@article{
 title = {Internet of Things (IoT) and Agricultural Unmanned Aerial Vehicles (UAVs) in Smart Farming: A Comprehensive Review},
 type = {article},
 year = {2020},
 pages = {100187},
 websites = {https://linkinghub.elsevier.com/retrieve/pii/S2542660520300238},
 month = {3},
 id = {d3cf56e5-e730-3a8b-9081-a2b21a430bd6},
 created = {2020-03-07T20:11:06.469Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-03-07T20:11:30.409Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {article},
 author = {Boursianis, Achilles D. and Papadopoulou, Maria S. and Diamantoulakis, Panagiotis and Liopa-Tsakalidi, Aglaia and Barouchas, Pantelis and Salahas, George and Karagiannidis, George and Wan, Shaohua and Goudos, Sotirios K.},
 doi = {10.1016/j.iot.2020.100187},
 journal = {Internet of Things}
}

@inproceedings{
 title = {MIMO antenna design for 5G communication systems using salp swarm algorithm},
 type = {inproceedings},
 year = {2020},
 keywords = {5G mobile communications,Bow tie antenna,MIMO antenna,Salp swarm algorithm,Swarm intelligence algorithms},
 month = {2},
 publisher = {Institute of Electrical and Electronics Engineers Inc.},
 day = {1},
 id = {24dc2833-7e5f-34bc-8e47-121118522668},
 created = {2020-09-12T19:12:33.475Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-09-12T19:12:50.269Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {Multiple Input Multiple Output (MIMO) antennas will be a part of every new user device in 5G networks. In this paper, we design a MIMO antenna for 5G networks using a nature-inspired algorithm, namely the Salp Swarm Algorithm (SSA). We select a bow tie antenna as the element of the MIMO operating in n257 frequency band (center frequency at 28GHz). Firstly, we design and optimize the antenna element using the SSA algorithm. Secondly, a MIMO antenna is designed using the optimal dimensions of the antenna element. Numerical results demonstrate that the proposed MIMO antenna has a small size and exhibits wideband operation in the desired frequency band.},
 bibtype = {inproceedings},
 author = {Boursianis, Achilles D. and Goudos, Sotirios K. and Yioultsis, Traianos V. and Siakavara, Katherine and Rocca, Paolo},
 doi = {10.1109/iWAT48004.2020.1570618331},
 booktitle = {2020 International Workshop on Antenna Technology, iWAT 2020}
}

Multiple Input Multiple Output (MIMO) antennas will be a part of every new user device in 5G networks. In this paper, we design a MIMO antenna for 5G networks using a nature-inspired algorithm, namely the Salp Swarm Algorithm (SSA). We select a bow tie antenna as the element of the MIMO operating in n257 frequency band (center frequency at 28GHz). Firstly, we design and optimize the antenna element using the SSA algorithm. Secondly, a MIMO antenna is designed using the optimal dimensions of the antenna element. Numerical results demonstrate that the proposed MIMO antenna has a small size and exhibits wideband operation in the desired frequency band.

@inproceedings{
 title = {Modified patch antenna design using moth search algorithm for rf energy harvesting applications},
 type = {inproceedings},
 year = {2020},
 keywords = {Microstrip antenna optimization,Moth search algorithm,Patch antenna,RF energy harvesting},
 month = {2},
 publisher = {Institute of Electrical and Electronics Engineers Inc.},
 day = {1},
 id = {18dca9be-8aea-3f80-a90c-68ae183bd73e},
 created = {2020-09-12T19:13:23.820Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-09-12T19:13:33.917Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {Radio frequency energy harvesting is a well-promising technique to power wireless sensor network devices that require small amounts of energy to operate. It can be utilized as an alternative technique for power-constrained systems, such as wireless sensor networks with limited battery lifetime, by extending their energy supply. In outdoor environments, the dominant ambient radio wave sources are the broadcasting and the mobile communication networks. In this paper, we apply an optimization technique by utilizing Moth Search algorithm to design a modified microstrip patch antenna of three varying slots. The proposed antenna exhibits tuning operation in the LoRa (Long Range) and the cellular communications frequency bands of GSM-1800 and UMTS. Numerical results exhibit an acceptable performance of the proposed antenna for RF energy harvesting applications.},
 bibtype = {inproceedings},
 author = {Boursianis, Achilles D. and Koulouridis, Stavros and Rocca, Paolo and Goudos, Sotirios K.},
 doi = {10.1109/iWAT48004.2020.1570609565},
 booktitle = {2020 International Workshop on Antenna Technology, iWAT 2020}
}

Radio frequency energy harvesting is a well-promising technique to power wireless sensor network devices that require small amounts of energy to operate. It can be utilized as an alternative technique for power-constrained systems, such as wireless sensor networks with limited battery lifetime, by extending their energy supply. In outdoor environments, the dominant ambient radio wave sources are the broadcasting and the mobile communication networks. In this paper, we apply an optimization technique by utilizing Moth Search algorithm to design a modified microstrip patch antenna of three varying slots. The proposed antenna exhibits tuning operation in the LoRa (Long Range) and the cellular communications frequency bands of GSM-1800 and UMTS. Numerical results exhibit an acceptable performance of the proposed antenna for RF energy harvesting applications.

@inproceedings{
 title = {Wearable 5-Gigahertz Wi-Fi Antenna Design Using Whale Optimization Algorithm},
 type = {inproceedings},
 year = {2020},
 keywords = {dual-band antenna,magneto-electric dipole antenna,textile antenna,wearable antenna},
 pages = {1-4},
 volume = {63},
 issue = {9},
 websites = {https://ieeexplore.ieee.org/document/9135735/},
 month = {3},
 publisher = {IEEE},
 day = {1},
 id = {487247e2-609c-3bfb-b098-58ac89c9c6d5},
 created = {2020-09-29T12:09:33.894Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-09-29T12:11:07.005Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {A wearable dual-band magneto-electric dipole antenna is proposed. Two U-shaped slots are introduced on a dipole and the resulting electric and magnetic resonances are combined with the aim to produce a dual band with wideband characteristics. The antenna is fabricated fully using textiles, except for the feeding connector. Simulations and measurements confirm the wide bandwidth and a low backward radiation in both the lower and the upper band. The antenna is robust and not very sensitive to bending when worn by the user. The specific absorption rate is studied numerically and proven to be well below the European limit of 2 W/kg.},
 bibtype = {inproceedings},
 author = {Boursianis, Achilles D. and Koulouridis, Stavros and Georgoulas, Dimitrios and Goudos, Sotirios K.},
 doi = {10.23919/EuCAP48036.2020.9135735},
 booktitle = {2020 14th European Conference on Antennas and Propagation (EuCAP)}
}

A wearable dual-band magneto-electric dipole antenna is proposed. Two U-shaped slots are introduced on a dipole and the resulting electric and magnetic resonances are combined with the aim to produce a dual band with wideband characteristics. The antenna is fabricated fully using textiles, except for the feeding connector. Simulations and measurements confirm the wide bandwidth and a low backward radiation in both the lower and the upper band. The antenna is robust and not very sensitive to bending when worn by the user. The specific absorption rate is studied numerically and proven to be well below the European limit of 2 W/kg.

@inproceedings{
 title = {Triple-band Inverted-F Antenna Using QR-OBL TLBO Algorithm for RF Energy Harvesting Applications},
 type = {inproceedings},
 year = {2020},
 keywords = {Inverted-F antenna,Quasi-Reflected Opposition Based Learning,RF energy harvesting,Teaching Learning Optimization Algorithm,optimization method.},
 pages = {1-4},
 websites = {https://ieeexplore.ieee.org/document/9200251/},
 month = {9},
 publisher = {IEEE},
 id = {7771bfa7-092a-31f6-9887-2be1633377e7},
 created = {2020-09-29T12:11:48.798Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-09-29T12:13:12.956Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {Radio Frequency Energy Harvesting (RF EH) is one of the popular emerging techniques in wireless sensor networks that can sufficiently supply low power electronic circuits. With the evolution of Internet of Things (IoT) technology, which exhibits an exponentially positive growth rate over the last years, RF EH can play a primary role in the next-generation wireless networks. In this paper, we apply an optimization technique by utilizing the Quasi-Reflected (QR) variant of Opposition Based Learning (OBL) technique in Teaching Learning Based Optimization (TLBO) algorithm to design a triple-band Inverted-F antenna (IFA) for RF energy harvesting applications. The proposed antenna is operating in the cellular communication frequency bands of EGSM-900 and GSM-1800, as well as at the Long Term Evolution (LTE) telecommunication networks frequency band of LTE-2600. Simulation results demonstrate that the designed antenna has features of operation which make it suitable for RF EH applications.},
 bibtype = {inproceedings},
 author = {Karampatea, Apostolia and Boursianis, Achilles D. and Goudos, Sotirios K. and Siakavara, Katherine},
 doi = {10.1109/MOCAST49295.2020.9200251},
 booktitle = {2020 9th International Conference on Modern Circuits and Systems Technologies (MOCAST)}
}

Radio Frequency Energy Harvesting (RF EH) is one of the popular emerging techniques in wireless sensor networks that can sufficiently supply low power electronic circuits. With the evolution of Internet of Things (IoT) technology, which exhibits an exponentially positive growth rate over the last years, RF EH can play a primary role in the next-generation wireless networks. In this paper, we apply an optimization technique by utilizing the Quasi-Reflected (QR) variant of Opposition Based Learning (OBL) technique in Teaching Learning Based Optimization (TLBO) algorithm to design a triple-band Inverted-F antenna (IFA) for RF energy harvesting applications. The proposed antenna is operating in the cellular communication frequency bands of EGSM-900 and GSM-1800, as well as at the Long Term Evolution (LTE) telecommunication networks frequency band of LTE-2600. Simulation results demonstrate that the designed antenna has features of operation which make it suitable for RF EH applications.

@inproceedings{
 title = {Waveform Design for Optimal Wireless Power Transfer Using Evolutionary Algorithms},
 type = {inproceedings},
 year = {2020},
 keywords = {Channel State Information,Evolutionary Algorithms,Waveform Design,Wireless Power Transfer},
 pages = {1-4},
 websites = {https://ieeexplore.ieee.org/document/9200277/},
 month = {9},
 publisher = {IEEE},
 id = {f105ac41-1429-3372-a2da-05da8ca26df0},
 created = {2020-09-29T12:14:02.807Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-09-29T12:14:17.785Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {One of the possible ways to increase the end-to-end power transfer efficiency in a radiative Wireless Power Transfer (WPT) system is by transmitting multi-tone signals optimized according to the receiver rectenna's nonlinear behavior and the Channel State Information (CSI). This optimization problem is a non-convex problem that has been tackled in the past with Sequential Convex Programming (SCP) algorithms. Since SCP algorithms do not guarantee to track the globally optimal solutions, there is interest in applying some other optimization methods to this problem. Here we apply various Evolutionary Algorithms (EAs) with different characteristics. The performance of the designed waveforms is evaluated in Matlab, using a simplified Single Input Single Output (SISO) system model. EAs are successfully applied to waveform design for WPT and seem to track the optimal solutions in the tested cases. Moreover, the effectiveness of the SCP-QCLP method is verified.},
 bibtype = {inproceedings},
 author = {Doanis, Pavlos and Boursianis, Achilles D. and Huillery, Julien and Breard, Arnaud and Duroc, Yvan and Goudos, Sotirios K.},
 doi = {10.1109/MOCAST49295.2020.9200277},
 booktitle = {2020 9th International Conference on Modern Circuits and Systems Technologies (MOCAST)}
}

One of the possible ways to increase the end-to-end power transfer efficiency in a radiative Wireless Power Transfer (WPT) system is by transmitting multi-tone signals optimized according to the receiver rectenna's nonlinear behavior and the Channel State Information (CSI). This optimization problem is a non-convex problem that has been tackled in the past with Sequential Convex Programming (SCP) algorithms. Since SCP algorithms do not guarantee to track the globally optimal solutions, there is interest in applying some other optimization methods to this problem. Here we apply various Evolutionary Algorithms (EAs) with different characteristics. The performance of the designed waveforms is evaluated in Matlab, using a simplified Single Input Single Output (SISO) system model. EAs are successfully applied to waveform design for WPT and seem to track the optimal solutions in the tested cases. Moreover, the effectiveness of the SCP-QCLP method is verified.

@inproceedings{
 title = {Dual-Band RF-to-DC Rectifier with High Efficiency for RF Energy Harvesting Applications},
 type = {inproceedings},
 year = {2020},
 keywords = {RF to DC rectifier,dual-band,energy harvesting,impedance matching,voltage multiplier,wireless sensors},
 pages = {1-4},
 websites = {https://ieeexplore.ieee.org/document/9200262/},
 month = {9},
 publisher = {IEEE},
 id = {8080da49-b1b2-305c-88eb-1b97c68091c7},
 created = {2020-09-29T12:15:14.944Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-09-29T12:15:24.996Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {Radio Frequency (RF) energy harvesting is emerging as a potentially reliable method to replace the costly and, difficult to maintain, source of low-power wireless sensors networks. In this paper, a dual-band RF-to-DC rectifier, that operates at LoRaWAN and GSM-900 cellular communication frequency bands, is presented. The system is composed of an impedance matching circuit, an RF-to-DC rectifier, that converts the ambient RF energy into DC voltage able to feed low power devices, and an output load. The proposed system resonates at two different frequencies of 866 MHz and 937 MHz. Numerical results demonstrate that the overall system exhibits an efficiency of 80% with 4.32 V of output voltage at 0 dBm of input power.},
 bibtype = {inproceedings},
 author = {Papadopoulou, Maria S. and Boursianis, Achilles D. and Skoufa, Anastasia and Volos, Christos K. and Stouboulos, Ioannis N. and Nikolaidis, Spyridon and Goudos, Sotirios K.},
 doi = {10.1109/MOCAST49295.2020.9200262},
 booktitle = {2020 9th International Conference on Modern Circuits and Systems Technologies (MOCAST)}
}

Radio Frequency (RF) energy harvesting is emerging as a potentially reliable method to replace the costly and, difficult to maintain, source of low-power wireless sensors networks. In this paper, a dual-band RF-to-DC rectifier, that operates at LoRaWAN and GSM-900 cellular communication frequency bands, is presented. The system is composed of an impedance matching circuit, an RF-to-DC rectifier, that converts the ambient RF energy into DC voltage able to feed low power devices, and an output load. The proposed system resonates at two different frequencies of 866 MHz and 937 MHz. Numerical results demonstrate that the overall system exhibits an efficiency of 80% with 4.32 V of output voltage at 0 dBm of input power.

@inproceedings{
 title = {Joint User Association and Power Allocation Using Swarm Intelligence Algorithms in Non-Orthogonal Multiple Access Networks},
 type = {inproceedings},
 year = {2020},
 keywords = {5G,Non-Orthogonal Multiple Access (NOMA),evolutionary algorithms,power allocation,user association},
 pages = {1-4},
 websites = {https://ieeexplore.ieee.org/document/9200248/},
 month = {9},
 publisher = {IEEE},
 id = {c2e3c4c0-5ea1-3c24-8da5-213c87bd0af3},
 created = {2020-09-29T12:19:08.474Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-09-29T12:19:17.599Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {In this paper, we address the problem of joint user association and power allocation for non-orthogonal multiple access (NOMA) networks with multiple base stations (BSs). A user grouping procedure into orthogonal clusters, as well as an allocation of different physical resource blocks (PRBs) is considered. The problem of interest is mathematically described using the maximization of the weighted sum rate. We apply two different swarm intelligence algorithms, namely, the recently introduced Grey Wolf Optimizer (GWO), and the popular Particle Swarm Optimization (PSO), in order to solve this problem. Numerical results demonstrate that the above-described problem can be satisfactorily addressed by both algorithms.},
 bibtype = {inproceedings},
 author = {Goudos, Sotirios K. and Diamantoulakis, Panagiotis D. and Boursianis, Achilles D. and Papanikolaou, Vasilis K. and Karagiannidis, George K.},
 doi = {10.1109/MOCAST49295.2020.9200248},
 booktitle = {2020 9th International Conference on Modern Circuits and Systems Technologies (MOCAST)}
}

In this paper, we address the problem of joint user association and power allocation for non-orthogonal multiple access (NOMA) networks with multiple base stations (BSs). A user grouping procedure into orthogonal clusters, as well as an allocation of different physical resource blocks (PRBs) is considered. The problem of interest is mathematically described using the maximization of the weighted sum rate. We apply two different swarm intelligence algorithms, namely, the recently introduced Grey Wolf Optimizer (GWO), and the popular Particle Swarm Optimization (PSO), in order to solve this problem. Numerical results demonstrate that the above-described problem can be satisfactorily addressed by both algorithms.

@article{
 title = {Differential Evolution in Waveform Design for Wireless Power Transfer},
 type = {article},
 year = {2020},
 pages = {96-113},
 volume = {1},
 month = {8},
 publisher = {MDPI AG},
 day = {4},
 id = {032114f7-1850-3ef3-ac02-c06d7756fa0c},
 created = {2020-09-29T12:20:04.122Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-09-29T12:20:15.741Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {The technique of transmitting multi-tone signals in a radiative Wireless Power Transfer (WPT) system can significantly increase its end-to-end power efficiency. The optimization problem in this system is to tune the transmission according to the receiver rectenna’s nonlinear behavior and the Channel State Information (CSI). This is a non-convex problem that has been previously addressed by Sequential Convex Programming (SCP) algorithms. Nonetheless, SCP algorithms do not always attain globally optimal solutions. To this end, in this paper, we evaluate a set of Evolutionary Algorithms (EAs) with several characteristics. The performance of the optimized multi-tone transmission signals in a WPT system is assessed by means of numerical simulations, utilizing a simplified Single Input Single Output (SISO) model. From the model evaluation, we can deduce that EAs can be successfully applied to the waveform design optimization problem. Moreover, from the presented results, we can derive that EAs can obtain the optimal solutions in the tested cases.},
 bibtype = {article},
 author = {Doanis, Pavlos and Boursianis, Achilles D. and Huillery, Julien and Bréard, Arnaud and Duroc, Yvan and Goudos, Sotirios K.},
 doi = {10.3390/telecom1020008},
 journal = {Telecom},
 number = {2}
}

The technique of transmitting multi-tone signals in a radiative Wireless Power Transfer (WPT) system can significantly increase its end-to-end power efficiency. The optimization problem in this system is to tune the transmission according to the receiver rectenna’s nonlinear behavior and the Channel State Information (CSI). This is a non-convex problem that has been previously addressed by Sequential Convex Programming (SCP) algorithms. Nonetheless, SCP algorithms do not always attain globally optimal solutions. To this end, in this paper, we evaluate a set of Evolutionary Algorithms (EAs) with several characteristics. The performance of the optimized multi-tone transmission signals in a WPT system is assessed by means of numerical simulations, utilizing a simplified Single Input Single Output (SISO) model. From the model evaluation, we can deduce that EAs can be successfully applied to the waveform design optimization problem. Moreover, from the presented results, we can derive that EAs can obtain the optimal solutions in the tested cases.

@inproceedings{
 title = {Dual-Band Single-Layered Modified E-shaped Patch Antenna for RF Energy Harvesting Systems},
 type = {inproceedings},
 year = {2020},
 keywords = {E-shaped patch antenna,energy harvesting,optimization method,radio frequency,salp swarm algorithm},
 pages = {1-4},
 websites = {https://ieeexplore.ieee.org/document/9218354/},
 month = {9},
 publisher = {IEEE},
 id = {08ec44c7-0f02-3719-b764-728f59e9a9b2},
 created = {2020-10-10T14:46:50.181Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-10-10T14:47:45.394Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {Radio Frequency Energy Harvesting (RF EH) is an alternative, yet well-promising technique to deliver power in electronic circuits of wireless sensor networks that require small amounts of energy. The design of the receiving module (antenna) in RF EH systems is a demanding and, in most cases, a complex task. As a result, an optimization method is often required. In this paper, we apply The Salp Swarm Algorithm to design and optimize a receiving module (dual-band modified E-shaped antenna) for RF EH systems. The proposed antenna operates in the frequency bands of LTE-2600 and 5G NR mobile communication networks. Numerical results exhibit a satisfactory operation of the optimized antenna as a receiving module in an RF EH system.},
 bibtype = {inproceedings},
 author = {Boursianis, Achilles D. and Papadopoulou, Maria S. and Nikolaidis, Spyridon and Goudos, Sotirios K.},
 doi = {10.1109/ECCTD49232.2020.9218354},
 booktitle = {2020 European Conference on Circuit Theory and Design (ECCTD)}
}

Radio Frequency Energy Harvesting (RF EH) is an alternative, yet well-promising technique to deliver power in electronic circuits of wireless sensor networks that require small amounts of energy. The design of the receiving module (antenna) in RF EH systems is a demanding and, in most cases, a complex task. As a result, an optimization method is often required. In this paper, we apply The Salp Swarm Algorithm to design and optimize a receiving module (dual-band modified E-shaped antenna) for RF EH systems. The proposed antenna operates in the frequency bands of LTE-2600 and 5G NR mobile communication networks. Numerical results exhibit a satisfactory operation of the optimized antenna as a receiving module in an RF EH system.

@article{
 title = {Smart Irrigation System for Precision Agriculture - The AREThOU5A IoT Platform},
 type = {article},
 year = {2020},
 pages = {1-1},
 websites = {https://ieeexplore.ieee.org/document/9239397/},
 id = {9ce11202-7bcd-38b5-bc31-7aade07709de},
 created = {2020-10-30T12:34:03.083Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-10-30T12:34:20.174Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {article},
 author = {Boursianis, Achilles D. and Papadopoulou, Maria S. and Gotsis, Antonis and Wan, Shaouha and Sarigiannidis, Panagiotis and Nikolaidis, Spyridon and Goudos, Sotirios K.},
 doi = {10.1109/JSEN.2020.3033526},
 journal = {IEEE Sensors Journal}
}

@inproceedings{
 title = {Modified Printed Bow-Tie Antenna for RF Energy Harvesting Applications},
 type = {inproceedings},
 year = {2020},
 pages = {67-71},
 websites = {https://ieeexplore.ieee.org/document/9245049/},
 month = {10},
 publisher = {IEEE},
 day = {1},
 id = {0c16efaa-8a0e-356c-b73e-84f5afaf18df},
 created = {2020-11-06T22:34:06.752Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-11-06T22:34:20.344Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {inproceedings},
 author = {Boursianis, Achilles D. and Papadopoulou, Maria S. and Nikolaidis, Spyridon and Goudos, Sotirios K.},
 doi = {10.1109/MTTW51045.2020.9245049},
 booktitle = {2020 IEEE Microwave Theory and Techniques in Wireless Communications (MTTW)}
}

@article{
 title = {Application of New Hybrid Jaya Grey Wolf Optimizer to Antenna Design for 5G Communications Systems},
 type = {article},
 year = {2019},
 pages = {71061-71071},
 volume = {7},
 websites = {https://ieeexplore.ieee.org/document/8723127/},
 id = {49c466f9-d8ce-338f-b7ac-fe5a2821705a},
 created = {2019-11-03T15:50:51.779Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T15:50:51.779Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {article},
 author = {Goudos, Sotirios K. and Yioultsis, Traianos V. and Boursianis, Achilles D. and Psannis, Kostas E. and Siakavara, Katherine},
 doi = {10.1109/ACCESS.2019.2919116},
 journal = {IEEE Access}
}

@article{
 title = {Advancing Rational Exploitation of Water Irrigation Using 5G-IoT Capabilities: The AREThOU5A Project},
 type = {article},
 year = {2019},
 keywords = {Internet of Things,Low-power wide-access technology,RF energy harvesting,Smart Agriculture},
 pages = {127-132},
 websites = {https://ieeexplore.ieee.org/document/8862146/},
 month = {7},
 publisher = {IEEE},
 id = {35db715f-b645-384e-80ce-3a5fb2b6e6cf},
 created = {2019-11-03T15:56:24.633Z},
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 last_modified = {2019-11-03T16:15:25.527Z},
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 authored = {true},
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 hidden = {false},
 private_publication = {false},
 abstract = {Water scarcity and desertification are considered to be among the greatest challenges of humanity over the coming decades. Worldwide, agriculture accounts to 69% of total water usage, while industry accounts for 23%, and urban use to 8%. In Greece, a rural development model and poor farming practices have resulted in an overwhelming 83% of total water consumption to be directed to farming uses. Furthermore, excessive use of water in agriculture combined with existing pesticides and fertilizers usage levels creates exponential problems in the water cycle in Greece. Taking into account the above challenges, the AREThOU5A Project aims to exploit the state-of-the-art technologies and, in particular, the emerging developments in the field of Internet of Things (IoT) as a means to promote rational use of water resources in agriculture. In particular, AREThOU5A Project aims at accelerating penetration of low-power wide-access (LPWA) technologies through a series of research and innovation actions focusing on the design, development, operation and commercial exploitation of relevant hardware/software IoT applications. Preliminary results of the AREThOU5A Project are depicted and future remarks are outlined.},
 bibtype = {article},
 author = {Boursianis, A. D. and Papadopoulou, M. S. and Damantoulakis, P. and Karampatea, A. and Doanis, P. and Geourgoulas, D. and Skoufa, A. and Valavanis, D. and Apostolidis, C. and Babas, D. G. and Baltzis, K. B. and Kaifas, T. N. and Siozios, K. and Siskos, S. and Samaras, T. and Siakavara, K. and Nikolaidis, S. and Goudos, S. K. and Liopa-Tsakalidi, A. and Barouchas, P. and Kasimis, I. and Kalamaras, G. and Merkouris, D. and Perrakis, G. and Tsirogiannis, C. and Gotsis, A. and Maliatsos, K.},
 doi = {10.1109/PATMOS.2019.8862146},
 journal = {2019 29th International Symposium on Power and Timing Modeling, Optimization and Simulation (PATMOS)}
}

Water scarcity and desertification are considered to be among the greatest challenges of humanity over the coming decades. Worldwide, agriculture accounts to 69% of total water usage, while industry accounts for 23%, and urban use to 8%. In Greece, a rural development model and poor farming practices have resulted in an overwhelming 83% of total water consumption to be directed to farming uses. Furthermore, excessive use of water in agriculture combined with existing pesticides and fertilizers usage levels creates exponential problems in the water cycle in Greece. Taking into account the above challenges, the AREThOU5A Project aims to exploit the state-of-the-art technologies and, in particular, the emerging developments in the field of Internet of Things (IoT) as a means to promote rational use of water resources in agriculture. In particular, AREThOU5A Project aims at accelerating penetration of low-power wide-access (LPWA) technologies through a series of research and innovation actions focusing on the design, development, operation and commercial exploitation of relevant hardware/software IoT applications. Preliminary results of the AREThOU5A Project are depicted and future remarks are outlined.

@techreport{
 title = {Low-Cost Dual-Band E-shaped Patch Antenna for Energy Harvesting Applications Using Grey Wolf Optimizer},
 type = {techreport},
 year = {2019},
 source = {2019 13th European Conference on Antennas and Propagation, EuCAP},
 keywords = {E-shaped antenna,Grey Wolf Opti-mizer (GWO) algorithm,Index Terms-Energy harvesting,LoRaWAN,mobile commu-nications,patch antenna},
 pages = {1-5},
 month = {3},
 publisher = {Institute of Electrical and Electronics Engineers Inc.},
 day = {1},
 id = {60dfe37e-25bd-348a-b6d8-a89993898877},
 created = {2019-11-03T16:02:21.133Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-09-30T07:02:51.295Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {Radio frequency energy harvesting is a well promising technique for proactive energy replenishment in next-generation wireless networks. To meet the challenging requirements of power consumption in future wireless networks, new antennas must be designed. In this paper, we refer to the antenna design problem for energy harvesting applications, by introducing a low-cost dual-band E-shaped patch antenna that operates at LoRaWAN and mobile communication frequency bands. The designed antenna is tuned at two different frequencies (866 MHz, 937 MHz) with a satisfactory bandwidth for both frequency bands.},
 bibtype = {techreport},
 author = {Boursianis, Achilles D and Goudos, Sotirios K and Yioultsis, Traianos V and Siakavara, Katherine}
}

Radio frequency energy harvesting is a well promising technique for proactive energy replenishment in next-generation wireless networks. To meet the challenging requirements of power consumption in future wireless networks, new antennas must be designed. In this paper, we refer to the antenna design problem for energy harvesting applications, by introducing a low-cost dual-band E-shaped patch antenna that operates at LoRaWAN and mobile communication frequency bands. The designed antenna is tuned at two different frequencies (866 MHz, 937 MHz) with a satisfactory bandwidth for both frequency bands.

@article{
 title = {Patch Antenna Design for C2C Communication Systems Using Monarch Butterfly Optimization},
 type = {article},
 year = {2019},
 pages = {239-241},
 websites = {https://ieeexplore.ieee.org/document/8730626/},
 month = {3},
 publisher = {IEEE},
 id = {5e066475-dab6-37c1-b45c-02b94a022488},
 created = {2019-11-03T16:09:20.259Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T16:09:20.259Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {article},
 author = {Boursianis, Achilles D. and Goudos, Sotirios K. and Kantartzis, Nikolaos V. and Koulouridis, Stavros},
 doi = {10.1109/IWAT.2019.8730626},
 journal = {2019 International Workshop on Antenna Technology (iWAT)}
}

@article{
 title = {Novel Methodology for Designing Antenna Arrays with Reduced Number of Elements Based on Differential Evolution with Ranking-Based Mutation Operators},
 type = {article},
 year = {2018},
 pages = {1-2},
 websites = {https://ieeexplore.ieee.org/document/8669304/},
 month = {7},
 publisher = {IEEE},
 id = {76e18c37-fd24-38cf-8fb2-c9c08d9e1a1e},
 created = {2019-11-03T16:15:00.224Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T16:15:00.224Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {article},
 author = {Goudos, Sotirios K. and Boursianis, Achilles and Siakavara, Katherine and Kantartzis, Nikolaos and Psannis, Kostas E.},
 doi = {10.23919/ACESS.2018.8669304},
 journal = {2018 International Applied Computational Electromagnetics Society Symposium - China (ACES)}
}

@article{
 title = {Phased Antenna Array Design using Shuffled Frog-Leaping Algorithm},
 type = {article},
 year = {2018},
 pages = {1845-1846},
 websites = {https://ieeexplore.ieee.org/document/8609068/},
 month = {7},
 publisher = {IEEE},
 id = {f405a244-a5dd-3840-a7b9-4bf024ce411f},
 created = {2019-11-03T16:18:19.390Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T16:18:19.390Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {article},
 author = {Boursianis, Achilles and Patakakis, Kostas and Goudos, Sotirios K. and Salucci, Marco and Massa, Andrea},
 doi = {10.1109/APUSNCURSINRSM.2018.8609068},
 journal = {2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting}
}

@article{
 title = {Prototype Wireless Sensor Network for Real-Time Measurements in Hydroponics Cultivation},
 type = {article},
 year = {2018},
 keywords = {Precision agriculture,rockwool substrate,soilless growing system,wireless sensor network},
 pages = {1-4},
 websites = {https://ieeexplore.ieee.org/document/8376576/},
 month = {5},
 publisher = {IEEE},
 id = {941edea2-a243-3b33-a91f-1774da8f79e4},
 created = {2019-11-03T16:19:41.290Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T16:31:01.710Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {This paper presents a prototype wireless sensor network (WSN) for real-time measurements in hydroponics cultivation. The proposed system exploits the advantages of wireless sensor networks (low cost, high reliability, scalability) and delivers a turn-key solution in soilless indoor growing systems. It consists of wireless sensor transmitter nodes (WSTNs) and a wireless sensor receiver node (WSRN). The sensors are deployed in a pre-determined manner (structured WSN); however, the deployment of the WSTNs can easily change. The infrastructure of the prototype wireless sensor network is achieved with Enhanced ShockBurst Protocol. A customized-driven application for the process of the real-time measurements is also presented. Preliminary results validate the systems operation and accuracy compared to a calibrated handheld system.},
 bibtype = {article},
 author = {Theopoulos, Argyris and Boursianis, Achilles and Koukounaras, Athanasios and Samaras, Theodoros},
 doi = {10.1109/MOCAST.2018.8376576},
 journal = {2018 7th International Conference on Modern Circuits and Systems Technologies (MOCAST)}
}

This paper presents a prototype wireless sensor network (WSN) for real-time measurements in hydroponics cultivation. The proposed system exploits the advantages of wireless sensor networks (low cost, high reliability, scalability) and delivers a turn-key solution in soilless indoor growing systems. It consists of wireless sensor transmitter nodes (WSTNs) and a wireless sensor receiver node (WSRN). The sensors are deployed in a pre-determined manner (structured WSN); however, the deployment of the WSTNs can easily change. The infrastructure of the prototype wireless sensor network is achieved with Enhanced ShockBurst Protocol. A customized-driven application for the process of the real-time measurements is also presented. Preliminary results validate the systems operation and accuracy compared to a calibrated handheld system.

@article{
 title = {Novel Three-Level Architecture for Broadband Fiber-Optic Networks},
 type = {article},
 year = {2018},
 pages = {1-4},
 websites = {https://ieeexplore.ieee.org/document/8376609/},
 month = {5},
 publisher = {IEEE},
 id = {9064b73d-549e-3f93-82b2-bcc6184d878a},
 created = {2019-11-03T16:25:13.687Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T18:32:52.480Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {This paper presents a novel three-level architecture model for broadband fiber-optic networks. The proposed model exploits the advantages (protocol transparency, reduced cost, infrastructure scalability) of the physical layer in a broadband fiber-optic network. It consists of three layers (central, distribution, access) of hierarchy and six network elements. A bottom-up approach is used to analyze the architecture of the proposed model. Moreover, an integrated system for broadband fiber-optic networks is presented, which is based on the proposed model. Representative examples of fiber-optic metropolitan area networks (MANs) that have been implemented in the region of Central Macedonia, Greece, are illustrated.},
 bibtype = {article},
 author = {Boursianis, Achilles and Samaras, Theodoros and Sahalos, John N.},
 doi = {10.1109/MOCAST.2018.8376609},
 journal = {2018 7th International Conference on Modern Circuits and Systems Technologies (MOCAST)}
}

This paper presents a novel three-level architecture model for broadband fiber-optic networks. The proposed model exploits the advantages (protocol transparency, reduced cost, infrastructure scalability) of the physical layer in a broadband fiber-optic network. It consists of three layers (central, distribution, access) of hierarchy and six network elements. A bottom-up approach is used to analyze the architecture of the proposed model. Moreover, an integrated system for broadband fiber-optic networks is presented, which is based on the proposed model. Representative examples of fiber-optic metropolitan area networks (MANs) that have been implemented in the region of Central Macedonia, Greece, are illustrated.

@article{
 title = {Assessment of General Public Exposure to LTE Signals Compared to Other Cellular Networks Present in Thessaloniki, Greece},
 type = {article},
 year = {2017},
 pages = {388–393},
 volume = {175},
 websites = {https://academic.oup.com/rpd/article-lookup/doi/10.1093/rpd/ncw362},
 month = {12},
 day = {15},
 id = {02e6b8e4-170a-389e-8da1-d7deba1e3fbd},
 created = {2019-11-03T15:48:52.707Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T18:24:44.960Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {To assess general public exposure to electromagnetic fields from Long Term Evolution (LTE) base stations, measurements at 10 sites in Thessaloniki, Greece were performed. Results are compared with other mobile cellular networks currently in use. All exposure values satisfy the guidelines for general public exposure of the International Commission on Non-Ionizing Radiation Protection (ICNIRP), as well as the reference levels by the Greek legislation at all sites. LTE electric field measurements were recorded up to 0.645 V/m. By applying the ICNIRP guidelines, the exposure ratio for all LTE signals is between 2.9 × 10-5 and 2.8 × 10-2. From the measurements results it is concluded that the average and maximum power density contribution of LTE downlink signals to the overall cellular networks signals are 7.8% and 36.7%, respectively.},
 bibtype = {article},
 author = {Gkonis, Fotios and Boursianis, Achilles and Samaras, Theodoros},
 doi = {10.1093/rpd/ncw362},
 journal = {Radiation Protection Dosimetry},
 number = {3}
}

To assess general public exposure to electromagnetic fields from Long Term Evolution (LTE) base stations, measurements at 10 sites in Thessaloniki, Greece were performed. Results are compared with other mobile cellular networks currently in use. All exposure values satisfy the guidelines for general public exposure of the International Commission on Non-Ionizing Radiation Protection (ICNIRP), as well as the reference levels by the Greek legislation at all sites. LTE electric field measurements were recorded up to 0.645 V/m. By applying the ICNIRP guidelines, the exposure ratio for all LTE signals is between 2.9 × 10-5 and 2.8 × 10-2. From the measurements results it is concluded that the average and maximum power density contribution of LTE downlink signals to the overall cellular networks signals are 7.8% and 36.7%, respectively.

@article{
 title = {Electromagnetic Field Exposure Changes Due to the Digital Television Switchover in Thessaloniki, Greece},
 type = {article},
 year = {2017},
 pages = {382-386},
 volume = {113},
 websites = {http://Insights.ovid.com/crossref?an=00004032-201711000-00007},
 month = {11},
 id = {43e8edf2-4514-3cb6-89b2-627b630e0c35},
 created = {2019-11-03T15:49:53.260Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T15:49:53.260Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {article},
 author = {Gkonis, Fotios and Boursianis, Achilles and Samaras, Theodoros},
 doi = {10.1097/HP.0000000000000718},
 journal = {Health Physics},
 number = {5}
}

@article{
 title = {A Preliminary Coverage Study in Millimeter Wave Bands for 5G Communication Networks},
 type = {article},
 year = {2017},
 keywords = {5G communication networks,millimeter wave bands,radio propagation models},
 pages = {1-4},
 websites = {http://ieeexplore.ieee.org/document/7937634/},
 month = {5},
 publisher = {IEEE},
 id = {b0b7fe2f-f58b-35ee-8a49-198611f07f14},
 created = {2019-11-03T16:26:06.449Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T18:25:19.867Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {In this paper, we make a preliminary coverage study for base stations (BS) in millimeter wave bands based on recently proposed propagation models. More specifically, we compute the cell radius and the coverage area of a future fifth generation (5G) cellular network based on the Close-In (CI) and the Alpha-Beta-Gamma (ABG) radio propagation models. Also, the required base station density is calculated corresponding to urban, suburban and rural regions.},
 bibtype = {article},
 author = {Kaitatzis, C. and Boursianis, A. and Goudos, S. K. and Dallas, P. I.},
 doi = {10.1109/MOCAST.2017.7937634},
 journal = {2017 6th International Conference on Modern Circuits and Systems Technologies (MOCAST)}
}

In this paper, we make a preliminary coverage study for base stations (BS) in millimeter wave bands based on recently proposed propagation models. More specifically, we compute the cell radius and the coverage area of a future fifth generation (5G) cellular network based on the Close-In (CI) and the Alpha-Beta-Gamma (ABG) radio propagation models. Also, the required base station density is calculated corresponding to urban, suburban and rural regions.

@article{
 title = {Fast Assessment of RF Power Absorption in Indoor Environments by Room Electromagnetics Theory},
 type = {article},
 year = {2016},
 pages = {477-482},
 volume = {171},
 websites = {https://academic.oup.com/rpd/article-lookup/doi/10.1093/rpd/ncv468},
 month = {11},
 day = {14},
 id = {4bc50aab-e0b6-3d6f-9bce-00bc687bd813},
 created = {2019-11-03T15:47:46.709Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T18:26:28.328Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {A fast method to assess radiofrequency (RF) radiation absorption in humans present in realistic indoor environments is proposed. The only required inputs are the room characteristics and the weight and position of the human with respect to the electromagnetic source. The method is compared and validated with full finite-difference time-domain simulations. Various realistic scenarios are investigated, in which one to six human phantoms are present. Whole-body power absorption ranges from 23.5 to 85.9 μW kg-1 with a median deviation of ~3.1 dB (51 %). While this difference may appear large, it is outbalanced by a calculation time of less than a second for the proposed method compared with ~17.5 h for a single full-wave electromagnetic simulation.},
 bibtype = {article},
 author = {Bamba, A. and Joseph, W. and Boursianis, A. and Samaras, T. and Vermeeren, G. and Thielens, A. and Martens, L.},
 doi = {10.1093/rpd/ncv468},
 journal = {Radiation Protection Dosimetry},
 number = {4}
}

A fast method to assess radiofrequency (RF) radiation absorption in humans present in realistic indoor environments is proposed. The only required inputs are the room characteristics and the weight and position of the human with respect to the electromagnetic source. The method is compared and validated with full finite-difference time-domain simulations. Various realistic scenarios are investigated, in which one to six human phantoms are present. Whole-body power absorption ranges from 23.5 to 85.9 μW kg-1 with a median deviation of ~3.1 dB (51 %). While this difference may appear large, it is outbalanced by a calculation time of less than a second for the proposed method compared with ~17.5 h for a single full-wave electromagnetic simulation.

@techreport{
 title = {Effects on Seedlings of Pre-Sowing Treated Tomato Seeds with Static Magnetic Field},
 type = {techreport},
 year = {2016},
 source = {2016 Annual Meeting of Bioelectromagnetics Society and European Bioelectromagnetics Association (BioEM 2016)},
 keywords = {magnetic seed field exposure mt},
 id = {bb3f87ce-9deb-35cb-9b29-4b3ece692387},
 created = {2019-11-03T16:28:34.900Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T18:31:09.837Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {Pre-sowing treatment of seeds with static magnetic field has been reported in the literature as a means of enhancing plant development. In the present work we have designed and constructed a setup for exposing vegetable seeds of tomato to static magnetic field (SMF). The results have shown that tomato seedlings significantly benefit from the pre-sowing treatment with magnetic flux density of 45 mT. The time of treatment that leads to improved growth is 90 min.},
 bibtype = {techreport},
 author = {Boursianis, Achilles and Koukounaras, Athanasios and Kostas, Stefanos and Theopoulos, Argyris and Samaras, Theodoros}
}

Pre-sowing treatment of seeds with static magnetic field has been reported in the literature as a means of enhancing plant development. In the present work we have designed and constructed a setup for exposing vegetable seeds of tomato to static magnetic field (SMF). The results have shown that tomato seedlings significantly benefit from the pre-sowing treatment with magnetic flux density of 45 mT. The time of treatment that leads to improved growth is 90 min.

@article{
 title = {UHF RFID antenna for ETSI and FCC reading applications},
 type = {article},
 year = {2016},
 pages = {1-4},
 websites = {http://ieeexplore.ieee.org/document/7495125/},
 month = {5},
 publisher = {IEEE},
 id = {b2733eed-28ee-3af0-be82-6db29c12d485},
 created = {2019-11-03T18:35:33.149Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T18:35:33.149Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {This paper presents the design of a UHF RFID reader antenna array suitable for applications in the frequency bands of ETSI and FCC standards. The antenna consists of geometrically alternating orthogonal elements (double-dipoles) which are fed in series and in phase by two parallel meander-shaped microstrip lines and creates beams with direction diversity. Simulated and measured results confirmed that for 30 dBm input power level, a semi-cylindrical volume along the longitudinal axis of the antenna with a radius of 500 mm is sufficiently covered. The operating bandwidth (RL>13 dB) of the antenna is about 72 MHz (861-933 MHz) and covers both the frequency bands of ETSI and FCC standards. Assuming tag sensitivity based on the worst-case scenario, experimental results verify that tagged items, which are randomly polarized within the coverage volume, can be properly identified regardless of their tag orientation.},
 bibtype = {article},
 author = {Boursianis, A. and Theopoulos, A. and Samaras, T. and Polycarpou, A. C. and Sahalos, J. N.},
 doi = {10.1109/MOCAST.2016.7495125},
 journal = {2016 5th International Conference on Modern Circuits and Systems Technologies (MOCAST)}
}

This paper presents the design of a UHF RFID reader antenna array suitable for applications in the frequency bands of ETSI and FCC standards. The antenna consists of geometrically alternating orthogonal elements (double-dipoles) which are fed in series and in phase by two parallel meander-shaped microstrip lines and creates beams with direction diversity. Simulated and measured results confirmed that for 30 dBm input power level, a semi-cylindrical volume along the longitudinal axis of the antenna with a radius of 500 mm is sufficiently covered. The operating bandwidth (RL>13 dB) of the antenna is about 72 MHz (861-933 MHz) and covers both the frequency bands of ETSI and FCC standards. Assuming tag sensitivity based on the worst-case scenario, experimental results verify that tagged items, which are randomly polarized within the coverage volume, can be properly identified regardless of their tag orientation.

@article{
 title = {A Wideband UHF RFID Reader Antenna Array with Bow-Tie Elements},
 type = {article},
 year = {2016},
 keywords = {RFID,bow-tie elements,reader antenna},
 pages = {1-4},
 websites = {http://ieeexplore.ieee.org/document/7481912/},
 month = {4},
 publisher = {IEEE},
 id = {b5c2fe9a-51ec-3526-ac01-12a2a87ec190},
 created = {2019-11-03T18:39:49.833Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T18:40:26.378Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {This paper presents the design procedure of a wideband UHF RFID reader antenna with polarization diversity suitable for searching tagged items. The antenna consists of a microstrip array with alternating orthogonal bow-tie elements, which are fed in series by a pair of microstrip lines. The elements are designed to provide the required bandwidth. The inter-element distance is adjusted to be about 0.8λ at the center frequency, whereas the elements provide in-phase excitation and create two orthogonal electric field components that give beams with polarization diversity. Simulated results indicate that the bandwidth covers the frequency bands of ETSI and FCC (865-928 MHz) standards. Regarding the coverage, it was deduced that the antenna can identify tagged items in a semi-cylindrical volume around its axis. The radius of coverage depends on the input power and tag sensitivity. A case study of reading tagged items in front of a cabinet with shelves is presented.},
 bibtype = {article},
 author = {Boursianis, Achilles and Dimitriou, Antonis and Bletsas, Aggelos and Sahalos, John N.},
 doi = {10.1109/EuCAP.2016.7481912},
 journal = {2016 10th European Conference on Antennas and Propagation (EuCAP)}
}

This paper presents the design procedure of a wideband UHF RFID reader antenna with polarization diversity suitable for searching tagged items. The antenna consists of a microstrip array with alternating orthogonal bow-tie elements, which are fed in series by a pair of microstrip lines. The elements are designed to provide the required bandwidth. The inter-element distance is adjusted to be about 0.8λ at the center frequency, whereas the elements provide in-phase excitation and create two orthogonal electric field components that give beams with polarization diversity. Simulated results indicate that the bandwidth covers the frequency bands of ETSI and FCC (865-928 MHz) standards. Regarding the coverage, it was deduced that the antenna can identify tagged items in a semi-cylindrical volume around its axis. The radius of coverage depends on the input power and tag sensitivity. A case study of reading tagged items in front of a cabinet with shelves is presented.

@article{
 title = {Design Procedure of UHF RFID Reader Antennas Based on ETSI and FCC Standards},
 type = {article},
 year = {2015},
 pages = {32-43},
 volume = {2},
 websites = {https://www.cambridge.org/core/product/identifier/S2052841815000019/type/journal_article},
 month = {3},
 day = {10},
 id = {c2f587dd-210f-3979-91c6-e7e9ba6cbdbd},
 created = {2019-11-03T15:46:15.624Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T18:27:17.173Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {<p>This paper presents the design procedure of two ultra-high-frequency radio frequency identification reader antennas used in searching tagged items. They consist of microstrip arrays with alternating orthogonal dipoles, which are fed in series by a pair of microstrip lines. The dipoles are designed properly to provide the required bandwidth. The inter-element distance is adjusted to the center frequency, where the elements provide in-phase excitation and create two orthogonal electric-field components that give beams with direction diversity. Simulated results show that the return loss bandwidth (RL &gt; 13 dB) of the first antenna design covers the required frequency band of ETSI (865–868 MHz) standard. In addition, simulated and measured results of the second antenna design indicate that the return loss bandwidth covers both the frequency bands of european telecommunications standards institute (ETSI) and federal communications commission (FCC) (865–928 MHz) standards. Regarding the coverage volume in the vicinity of the antenna, it was deduced that both antennas can read tagged items in a semi-cylindrical volume that extends to a radius of more than 50 cm. Finally, a case study of reading tagged books in front of a library cabinet with six shelves has been presented.</p>},
 bibtype = {article},
 author = {Polycarpou, Anastasis C. and Boursianis, Achilles and Samaras, Theodoros and Bletsas, Aggelos and Sahalos, John N.},
 doi = {10.1017/wpt.2015.1},
 journal = {Wireless Power Transfer},
 number = {1}
}

This paper presents the design procedure of two ultra-high-frequency radio frequency identification reader antennas used in searching tagged items. They consist of microstrip arrays with alternating orthogonal dipoles, which are fed in series by a pair of microstrip lines. The dipoles are designed properly to provide the required bandwidth. The inter-element distance is adjusted to the center frequency, where the elements provide in-phase excitation and create two orthogonal electric-field components that give beams with direction diversity. Simulated results show that the return loss bandwidth (RL > 13 dB) of the first antenna design covers the required frequency band of ETSI (865–868 MHz) standard. In addition, simulated and measured results of the second antenna design indicate that the return loss bandwidth covers both the frequency bands of european telecommunications standards institute (ETSI) and federal communications commission (FCC) (865–928 MHz) standards. Regarding the coverage volume in the vicinity of the antenna, it was deduced that both antennas can read tagged items in a semi-cylindrical volume that extends to a radius of more than 50 cm. Finally, a case study of reading tagged books in front of a library cabinet with six shelves has been presented.

@techreport{
 title = {Comparison of a Fast Probabilistic Propagation Model Against an Analytical Computational-EM Model and Measurements for the Evaluation of Passive RFID Systems},
 type = {techreport},
 year = {2015},
 source = {2015 9th European Conference on Antennas and Propagation, EuCAP 2015},
 keywords = {RFID,analytical model,probabilistic model},
 pages = {1-4},
 month = {8},
 publisher = {Institute of Electrical and Electronics Engineers Inc.},
 day = {27},
 id = {dafaa96e-11cc-34e7-b5b8-6b78da11ec11},
 created = {2019-11-03T18:42:55.728Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-09-30T07:04:50.367Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {This paper presents the comparison of a fast prob-abilistic propagation model against an analytical computational electromagnetic (EM) model and measurements performed for the evaluation of passive RFID systems. The results of the probabilistic model compared to the ones of the analytical model, as well as to the measurements, are in fairly good agreement. Index terms-probabilistic model, analytical model, RFID.},
 bibtype = {techreport},
 author = {Dimitriou, Antonis G and Boursianis, Achilles and Markakis, Ioannis and Siachalou, Stavroula and Samaras, Theodoros and Sahalos, John N}
}

This paper presents the comparison of a fast prob-abilistic propagation model against an analytical computational electromagnetic (EM) model and measurements performed for the evaluation of passive RFID systems. The results of the probabilistic model compared to the ones of the analytical model, as well as to the measurements, are in fairly good agreement. Index terms-probabilistic model, analytical model, RFID.

@article{
 title = {A UHF RFID Reader Antenna for Searching Tagged Items},
 type = {article},
 year = {2014},
 keywords = {RFID,library management system,propagation,reader antennas},
 pages = {193-198},
 websites = {http://ieeexplore.ieee.org/document/6934226/},
 month = {9},
 publisher = {IEEE},
 id = {84c6c2f1-049c-38be-bd0d-1626245e1773},
 created = {2019-11-03T20:00:03.979Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T20:00:59.889Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {In this work, a mobile antenna of a UHF RFID reader for searching tagged items on the shelves is presented. The antenna consists of a microstrip array of alternating orthogonal double dipoles which are fed in series by a meander microstrip line. The individual dipoles are designed such as to provide high bandwidth. The distance between the double dipoles is adjusted in order to excite them in phase at 867MHz and create two orthogonal electric-field components. The number of dipoles and the inter-element distance create beams with direction diversity. Based on the analysis of the pattern and the radiated field in the near-field zone, it was found that a semi-cylindrical area around the axis of the antenna is sufficiently covered.},
 bibtype = {article},
 author = {Boursianis, Achilles and Samaras, Theodoros and Polycarpou, Anastasis C. and Sahalos, John N.},
 doi = {10.1109/RFID-TA.2014.6934226},
 journal = {2014 IEEE RFID Technology and Applications Conference (RFID-TA)}
}

In this work, a mobile antenna of a UHF RFID reader for searching tagged items on the shelves is presented. The antenna consists of a microstrip array of alternating orthogonal double dipoles which are fed in series by a meander microstrip line. The individual dipoles are designed such as to provide high bandwidth. The distance between the double dipoles is adjusted in order to excite them in phase at 867MHz and create two orthogonal electric-field components. The number of dipoles and the inter-element distance create beams with direction diversity. Based on the analysis of the pattern and the radiated field in the near-field zone, it was found that a semi-cylindrical area around the axis of the antenna is sufficiently covered.

@techreport{
 title = {On the Design of a Mobile RFID System for Searching of Misplaced or Lost Tagged Items},
 type = {techreport},
 year = {2014},
 source = {2014 8th European Conference on Antennas and Propagation (EUCAP)},
 keywords = {2,achilles boursianis 2,anastasis c,lost tagged items,mobile rfid system for,n,polycarpou 1 and john,sahalos 1,searching of misplaced or,the design of a,theodoros samaras 2},
 websites = {http://www.ansoft.com.},
 id = {246e4ad3-4d42-3775-8811-c0409bc07530},
 created = {2019-11-03T21:55:44.926Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-04T08:59:22.524Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {In this work, a UHF mobile RFID system for searching of misplaced or lost tagged items is presented. The system consists of a microstrip antenna array with alternate orthogonal dipoles which are fed in series by a microstrip line. The distance between the dipoles is adjusted in order to excite them in phase and radiate two orthogonal electric-field components. The number of dipoles and the large inter-element distance, create beams with direction diversity. From the analysis of the near zone field it is found that a semi-cylindrical area around the axis of the antenna is sufficiently covered. Index Terms-RFID, near-field antennas, propagation, library management system.},
 bibtype = {techreport},
 author = {Boursianis, Achilles and Samaras, Theodoros and Polycarpou, Anastasis C and Sahalos, John N}
}

In this work, a UHF mobile RFID system for searching of misplaced or lost tagged items is presented. The system consists of a microstrip antenna array with alternate orthogonal dipoles which are fed in series by a microstrip line. The distance between the dipoles is adjusted in order to excite them in phase and radiate two orthogonal electric-field components. The number of dipoles and the large inter-element distance, create beams with direction diversity. From the analysis of the near zone field it is found that a semi-cylindrical area around the axis of the antenna is sufficiently covered. Index Terms-RFID, near-field antennas, propagation, library management system.

@article{
 title = {Prediction of Transmission Path Loss in Indoor Environments with the Radiosity Method},
 type = {article},
 year = {2013},
 keywords = {indoor propagation,microwave propagation,progressive radiosity,transmission loss},
 pages = {2401-2405},
 volume = {55},
 websites = {http://doi.wiley.com/10.1002/mop.27864},
 month = {10},
 id = {d6cf6529-2b20-39f8-98a1-2069202dc85a},
 created = {2019-11-03T15:45:08.855Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T18:29:40.452Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {In this work, we present the implementation of the radiosity method for path loss prediction inside indoor environments. We demonstrate its accuracy and computational efficiency by comparing our calculations to the results obtained with measurements and a full wave solution.},
 bibtype = {article},
 author = {Mouhtaropoulos, Dimitris and Boursianis, Achilles and Samaras, Theodoros},
 doi = {10.1002/mop.27864},
 journal = {Microwave and Optical Technology Letters},
 number = {10}
}

In this work, we present the implementation of the radiosity method for path loss prediction inside indoor environments. We demonstrate its accuracy and computational efficiency by comparing our calculations to the results obtained with measurements and a full wave solution.

@techreport{
 title = {On the Worst-Case Whole-Body SAR Assessment Due to Far-Field Exposure},
 type = {techreport},
 year = {2013},
 source = {2013 Annual Meeting of Bioelectromagnetics Society and European Bioelectromagnetics Association (BioEM 2013)},
 pages = {438-441},
 websites = {https://www.bems.org/node/8386},
 id = {e32e27d1-ed23-3b14-b34e-24a130e8a0b4},
 created = {2019-11-03T22:00:09.015Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2020-09-30T08:00:30.786Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {In this study we report a deterministic approach to evaluate the worst-case whole-body SAR due to far-field exposure. The approach is validated against a statistical approach (Monte Carlo) and the Self-Adaptive Differential Evolution optimization method, for two human numerical models and two frequencies under illumination from twelve plane-waves. It appears that the statistical approach performs worse than the other two methods, because it predicts lower values for the SAR.},
 bibtype = {techreport},
 author = {Boursianis, Achilles and Markakis, Ioannis and Goudos, Sotirios K and Samaras, Theodoros}
}

In this study we report a deterministic approach to evaluate the worst-case whole-body SAR due to far-field exposure. The approach is validated against a statistical approach (Monte Carlo) and the Self-Adaptive Differential Evolution optimization method, for two human numerical models and two frequencies under illumination from twelve plane-waves. It appears that the statistical approach performs worse than the other two methods, because it predicts lower values for the SAR.

@article{
 title = {Measurements for Assessing the Exposure from 3G Femtocells},
 type = {article},
 year = {2012},
 pages = {158-167},
 volume = {150},
 websites = {https://academic.oup.com/rpd/article-lookup/doi/10.1093/rpd/ncr398},
 month = {6},
 day = {1},
 id = {4a043fac-116a-3f49-900d-7212e0c4d0a5},
 created = {2019-11-03T15:29:31.886Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T18:28:08.560Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {Femtocells are low-power access points, which combine mobile and broadband technologies. The main operation of a femtocell is to function as a miniature base station unit in an indoor environment and to connect to the operator's network through a broadband phone line or a coaxial cable line. This study provides the first experimental measurements and results in Greece for the assessment of exposure to a femtocell access point (FAP) indoors. Using a mobile handset with the appropriate software, power level measurements of the transmitted (Tx) and the received by the mobile handset signal were performed in two different and typical (home and office) environments. Moreover, radiofrequency electric field strength and frequency selective measurements with a radiation meter (SRM-3000) were carried out in the proximity of the FAP installation point. The cumulative distribution functions of the Tx power at most cases (except one) show that in 90% of all points the power of the mobile phone was lower by at least 7 dB during FAP operation. At a distance of ~1 m from the FAP (in its main beam), power flux density measurements show that there is very little difference between the two situations (FAP ON and OFF). As a conclusion, the use of femtocells indoors improves reception quality, reduces the Tx power of the user's mobile terminal and results in an indiscernible increase of the electromagnetic field in front of the unit, at values that are extremely low compared with reference levels of exposure guidelines. © The Author 2011. Published by Oxford University Press. All rights reserved.},
 bibtype = {article},
 author = {Boursianis, A. and Vanias, P. and Samaras, T.},
 doi = {10.1093/rpd/ncr398},
 journal = {Radiation Protection Dosimetry},
 number = {2}
}

Femtocells are low-power access points, which combine mobile and broadband technologies. The main operation of a femtocell is to function as a miniature base station unit in an indoor environment and to connect to the operator's network through a broadband phone line or a coaxial cable line. This study provides the first experimental measurements and results in Greece for the assessment of exposure to a femtocell access point (FAP) indoors. Using a mobile handset with the appropriate software, power level measurements of the transmitted (Tx) and the received by the mobile handset signal were performed in two different and typical (home and office) environments. Moreover, radiofrequency electric field strength and frequency selective measurements with a radiation meter (SRM-3000) were carried out in the proximity of the FAP installation point. The cumulative distribution functions of the Tx power at most cases (except one) show that in 90% of all points the power of the mobile phone was lower by at least 7 dB during FAP operation. At a distance of ~1 m from the FAP (in its main beam), power flux density measurements show that there is very little difference between the two situations (FAP ON and OFF). As a conclusion, the use of femtocells indoors improves reception quality, reduces the Tx power of the user's mobile terminal and results in an indiscernible increase of the electromagnetic field in front of the unit, at values that are extremely low compared with reference levels of exposure guidelines. © The Author 2011. Published by Oxford University Press. All rights reserved.

@article{
 title = {Continuous Εlectromagnetic Radiation Monitoring in the Environment: Analysis of the Results in Greece},
 type = {article},
 year = {2012},
 pages = {437-442},
 volume = {151},
 websites = {https://academic.oup.com/rpd/article-lookup/doi/10.1093/rpd/ncs028},
 month = {9},
 day = {1},
 id = {bc14e60f-6b8a-3fb2-854d-1e588e21b4c9},
 created = {2019-11-03T15:30:54.145Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T18:27:49.604Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {Non-ionising radiation-monitoring networks were initiated as a result of the public concerns about the potential health effects from telecommunication emissions. In the present study, the data acquired from such networks in Greece are used to assess the changes in the outdoor electromagnetic environment with respect to location and time. The study shows that there is a statistically significant difference between the urban (median electric field: 1.1 V m.-1) and the rural (median electric field: 0.3 V m.-1) installations of monitoring units and also shows that there is a median diurnal variation (daily maximum to minimum) of 20.2 and 33.8 % for the broadcasting and mobile telecommunication emissions, respectively. Moreover, there is a difference in the electric field between daytime and night, but not between morning and afternoon. The results are in line with previously published data from spot measurements, monitoring networks and personal exposimeter studies performed in several European countries. © The Author 2012. Published by Oxford University Press. All rights reserved.},
 bibtype = {article},
 author = {Manassas, A. and Boursianis, A. and Samaras, T. and Sahalos, J. N.},
 doi = {10.1093/rpd/ncs028},
 journal = {Radiation Protection Dosimetry},
 number = {3}
}

Non-ionising radiation-monitoring networks were initiated as a result of the public concerns about the potential health effects from telecommunication emissions. In the present study, the data acquired from such networks in Greece are used to assess the changes in the outdoor electromagnetic environment with respect to location and time. The study shows that there is a statistically significant difference between the urban (median electric field: 1.1 V m.-1) and the rural (median electric field: 0.3 V m.-1) installations of monitoring units and also shows that there is a median diurnal variation (daily maximum to minimum) of 20.2 and 33.8 % for the broadcasting and mobile telecommunication emissions, respectively. Moreover, there is a difference in the electric field between daytime and night, but not between morning and afternoon. The results are in line with previously published data from spot measurements, monitoring networks and personal exposimeter studies performed in several European countries. © The Author 2012. Published by Oxford University Press. All rights reserved.

@techreport{
 title = {Measurements for assessing the exposure from 3G femtocells},
 type = {techreport},
 year = {2011},
 source = {2011 10th International Conference of the European BioElectromagnetics Association (EBEA)},
 id = {106ef022-43a6-34b6-9362-49e936b7ed85},
 created = {2019-11-03T22:06:06.722Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-04T08:58:29.195Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {Femtocells are low-power access points, which combine mobile and broadband technologies. The main operation of a femtocell is to function as a miniature base station unit in an indoor environment and to connect to the operator's network through a broadband phone line or a coaxial cable line. This study provides the first experimental measurements and results in Greece for the assessment of exposure to a femtocell access point (FAP) indoors. Using a mobile handset with the appropriate software, power level measurements of the transmitted (Tx) and the received by the mobile handset signal were performed in two different and typical (home and office) environments. Moreover, radiofrequency electric field strength and frequency selective measurements with a radiation meter (SRM-3000) were carried out in the proximity of the FAP installation point. The cumulative distribution functions of the Tx power at most cases (except one) show that in 90% of all points the power of the mobile phone was lower by at least 7 dB during FAP operation. At a distance of ~1 m from the FAP (in its main beam), power flux density measurements show that there is very little difference between the two situations (FAP ON and OFF). As a conclusion, the use of femtocells indoors improves reception quality, reduces the Tx power of the user's mobile terminal and results in an indiscernible increase of the electromagnetic field in front of the unit, at values that are extremely low compared with reference levels of exposure guidelines. © The Author 2011. Published by Oxford University Press. All rights reserved.},
 bibtype = {techreport},
 author = {Boursianis, Achilles and Markakis, Ioannis and Manoli, Zoi and Tachas, Nikolaos J and Samaras, Theodoros},
 doi = {10.1093/rpd/ncr398}
}

Femtocells are low-power access points, which combine mobile and broadband technologies. The main operation of a femtocell is to function as a miniature base station unit in an indoor environment and to connect to the operator's network through a broadband phone line or a coaxial cable line. This study provides the first experimental measurements and results in Greece for the assessment of exposure to a femtocell access point (FAP) indoors. Using a mobile handset with the appropriate software, power level measurements of the transmitted (Tx) and the received by the mobile handset signal were performed in two different and typical (home and office) environments. Moreover, radiofrequency electric field strength and frequency selective measurements with a radiation meter (SRM-3000) were carried out in the proximity of the FAP installation point. The cumulative distribution functions of the Tx power at most cases (except one) show that in 90% of all points the power of the mobile phone was lower by at least 7 dB during FAP operation. At a distance of ~1 m from the FAP (in its main beam), power flux density measurements show that there is very little difference between the two situations (FAP ON and OFF). As a conclusion, the use of femtocells indoors improves reception quality, reduces the Tx power of the user's mobile terminal and results in an indiscernible increase of the electromagnetic field in front of the unit, at values that are extremely low compared with reference levels of exposure guidelines. © The Author 2011. Published by Oxford University Press. All rights reserved.

@article{
 title = {A Broadband Monitoring System for Electromagnetic-Radiation Assessment},
 type = {article},
 year = {2009},
 pages = {71-79},
 volume = {51},
 websites = {http://ieeexplore.ieee.org/document/4939020/},
 month = {2},
 id = {6dab315c-d5bb-35f8-8af5-b1ad8562b33d},
 created = {2019-11-03T09:44:20.841Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-03T09:44:20.841Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {article},
 author = {Mavromatis, F. and Boursianis, A. and Samaras, T. and Koukourlis, C. and Sahalos, J.N.},
 doi = {10.1109/MAP.2009.4939020},
 journal = {IEEE Antennas and Propagation Magazine},
 number = {1}
}

@techreport{
 title = {Design of a Monitoring System for Electromagnetic Radiation Measurements},
 type = {techreport},
 year = {2008},
 source = {2008 XXIX General Assembly of the International Union of Radio Science, URSI GA},
 keywords = {Broadband probes,electromagnetic fields,isotropic probes,monitoring systems},
 id = {0a3f53e2-9f37-3fa0-a9b1-8ddec51d946f},
 created = {2019-11-03T22:09:06.059Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-04T08:58:14.069Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {The design of a monitoring system for measuring on a 24-hour basis the total electric field radiated from broadcasting and radiocommunications systems is presented. An omni-directional sensor antenna and the appropriate electronic circuits have been implemented. In the system various digital and analog peripherals are connected with a low-power, 8bit RISC microcontroller of Microchip, running at 10MHz. The measured data can be sending to a personal computer through a USB interface or through a GSM modem. Low cost electronics and high reliability of the system can deploy trustworthy electromagnetic radiation monitoring networks which will offer a security feeling to the public. The sensor's pattern, the response linearity and the frequency response have been tested and have shown the appropriate specifications.},
 bibtype = {techreport},
 author = {Mavromatis, F and Boursianis, A and Samaras, Th and Koukourlis, Ch and Sahalos, J N}
}

The design of a monitoring system for measuring on a 24-hour basis the total electric field radiated from broadcasting and radiocommunications systems is presented. An omni-directional sensor antenna and the appropriate electronic circuits have been implemented. In the system various digital and analog peripherals are connected with a low-power, 8bit RISC microcontroller of Microchip, running at 10MHz. The measured data can be sending to a personal computer through a USB interface or through a GSM modem. Low cost electronics and high reliability of the system can deploy trustworthy electromagnetic radiation monitoring networks which will offer a security feeling to the public. The sensor's pattern, the response linearity and the frequency response have been tested and have shown the appropriate specifications.

@article{
 title = {Hermes Program: the Greek Experience of an Electromagnetic Radiation Monitoring System},
 type = {article},
 year = {2008},
 id = {da80d6fe-9460-3803-b255-927ebea235da},
 created = {2019-11-04T08:54:59.049Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-04T09:17:13.569Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {article},
 author = {Manasas, A and Boursianis, A and Samaras, T and Sahalos, J},
 journal = {2008 3rd Management Committee Meeting & Workshop on "Antenna Systems & Sensors for Information Society Technologies", COST IC0603}
}

@article{
 title = {A Broadband Monitoring System for Electromagnetic Radiation Assessment},
 type = {article},
 year = {2007},
 id = {c0b8961f-6ba8-3364-bd7b-72ebd708cac8},
 created = {2019-11-04T08:56:57.018Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-04T09:16:33.573Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {article},
 author = {Mavromatis, F and Boursianis, A and Samaras, T and Koukourlis, C and Sahalos, J},
 journal = {2007 2nd Management Committee Meeting & Workshop on "Antenna Systems & Sensors for Information Society Technologies", COST IC0603}
}

@article{
 title = {Design, Development and Operation of an Electromagnetic Radiation Monitoring Network in Greece: “HERMES” Project},
 type = {article},
 year = {2006},
 pages = {744-753},
 id = {94d30653-c349-34a5-ab84-340f629c3f18},
 created = {2019-11-04T09:08:37.214Z},
 file_attached = {false},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-04T09:15:53.701Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {article},
 author = {Komnakos, D and Gotsis, A and Koutsianas, N and Yalofas, A and Constantinou, P and Ganatsos, T and Boursianis, A and Tsanidis, G and Samaras, T and Sahalos, J and Chera, E and Tyrakis, C and Belesiotis, G and Petkaris, M and Vasiliou, K},
 journal = {2006 Proceedings 4th International Workshop on Biological Effects of Electromagnetic Fields}
}

@article{
 title = {Installation and Operation of an Electromagnetic Radiation Monitoring Network in Greece},
 type = {article},
 year = {2004},
 pages = {360},
 volume = {1},
 id = {661e5140-5766-33bd-b5ab-2d98d1bb99d3},
 created = {2019-11-04T09:11:50.219Z},
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 last_modified = {2019-11-04T09:15:03.885Z},
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 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 bibtype = {article},
 author = {Gotsis, A and Yalofas, A and Constantinou, P and Boursianis, A and Ganatsos, T and Tachas, N and Samaras, undefined and Daskalou, undefined and Petkaris, M},
 journal = {2004 Proceedings of Biological Effects of EMFs 3rd International Workshop}
}

@techreport{
 title = {Land Planning of an Antenna Farm: Measurements and Simulations Aimed at Relocation of Broadcasting Stations and/or Reassignment of Frequencies},
 type = {techreport},
 year = {2004},
 source = {2004 Proceedings of EMC Europe 2004},
 pages = {338-341},
 volume = {1},
 id = {8f756bce-5b77-3952-bde7-e77c90249a46},
 created = {2019-11-04T09:12:42.751Z},
 file_attached = {true},
 profile_id = {92581d97-724a-345d-9f14-9035bd05a74d},
 last_modified = {2019-11-04T09:14:32.308Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {A methodology applied to land planning of an antenna farm is presented in this study. The first part of the study refers to measurements made at critical points around the existing antenna farm in order to evaluate the current situation. Broadband measurements have been made in a dense grid of sites that covers the broader area of interest. Narrowband measurements have also been conducted to estimate the contribution of existing broadcasting stations to current radiation levels and the safety index. The second part of the study refers to the future situation, which was predicted by use of computer simulations. The predicted radiation levels have been compared to the present levels and the exposure limits, thus leading to proposals for a new location and structure of the antenna farm.},
 bibtype = {techreport},
 author = {Miaris, G and Adamidis, G and Bourganis, E and Balaskas, A and Boursianis, A and Ganatsos, T and Kritikos, G and Matzaridou, M A and Moneda, A and Notis, D T and Siachalou, S J and Christodoulou, M G and Ioannidou, M P and Samaras, T and Vafiadis, E and Chrissoulidis, D P and Sahalos, J N}
}

A methodology applied to land planning of an antenna farm is presented in this study. The first part of the study refers to measurements made at critical points around the existing antenna farm in order to evaluate the current situation. Broadband measurements have been made in a dense grid of sites that covers the broader area of interest. Narrowband measurements have also been conducted to estimate the contribution of existing broadcasting stations to current radiation levels and the safety index. The second part of the study refers to the future situation, which was predicted by use of computer simulations. The predicted radiation levels have been compared to the present levels and the exposure limits, thus leading to proposals for a new location and structure of the antenna farm.