A. Bechrakis Triantafyllos

PhD student
Terahertz Sensing (THZ), Department of Microelectronics

Expertise: Integrated antennas, near-field communications, and quasi-optical systems

Biography

Alexandros Bechrakis Triantafyllos (Graduate Student Member, IEEE) received the B.Sc. and M.Sc. degrees (cum laude) in electrical and computer engineering from the National Technical University of Athens (NTUA), Athens, Greece, in 2020, and the M.Sc. degree (cum laude) in electrical engineering from the Delft University of Technology, Delft, The Netherlands, in 2023, where he is currently pursuing the Ph.D. degree with the Terahertz Sensing Group, with a focus on the development of quasi-optical integrated front ends for backhauling applications in the THz band. His main research interests include integrated antennas, near-field communications, and quasi-optical systems. Mr. Bechrakis Triantafyllos was a recipient of the Onassis Foundation Scholarship in 2021.

Publications

A 220–340 GHz Modified Marchand Balun With Asymmetric Ground Shield in 90-nm SiGe-BiCMOS
Bechrakis Triantafyllos, A.; Cavallo, D.; Spirito, M.; Aufinger, K.; Llombart, N.; Alonso-delPino, M.;
IEEE Microwave and Wireless Technology Letters,
2026. Early Access. DOI: 10.1109/LMWT.2026.3677588
Design and characterization of wideband dual-polarized double-slot lens antenna with low cross-polarization at sub-THz in SiGe-BiCMOS
Bechrakis Triantafyllos, A.; Alonso-delPino, M.; Cavallo, D.; Aufinger, K.; Spirito, M.; Llombart, N.;
IEEE Open Journal of Antennas and Propagation,
2026. Early Access. DOI: 10.1109/OJAP.2026.3690779
Optimization of spherically conformal fly-eye's lens antenna arrays
van Rooijen, N.; Bechrakis Triantafyllos, A.; Alonso-delPino, M.; LLombar, N.;
In European Conference on Antennas and Propagation (EuCAP),
Dublin, Ireland, Apr. 19-24 2026.
A Reflector-Lens Hybrid Antenna System for Backhaul Links at 300 GHz
Bechrakis Triantafyllos, A.; Zhang, H.; Alonso-delPino, M.; LLombart, N.;
In European Conference on Antennas and Propagation (EuCAP),
Dublin, Ireland, Apr. 19-24 2026.
Quasi-Optical MIMO Antennas for Realizing Tbps near-Field Communication Links
Zhang, H.; Swist, D.; Bechrakis Triantafyllos, A.; Dörpinghaus, M.and Alonso-delPino, M.; Fettweis, G. P.; LLombart, N.;
In European Conference on Antennas and Propagation (EuCAP),
Dublin, Ireland, Apr. 19-24 2026.
Design of a Lens Based Quasi-Optical System with 26x26 Scanned Beams for Wireless Communication Links at 300GHz
Bechrakis Triantafyllos, A.; Zhang, H.; Alonso-delPino, M.; Llombart, N.;
In 2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz),
Helsinki, Finland, pp. 1-2, 17-22 Aug. 2025. DOI: 10.1109/IRMMW-THz61557.2025.11319842
Dual polarized double-slot lens antenna with low cross-polarization at 300 GHz in 90nm SiGe-BiCMOS
Bechrakis Triantafyllos, A.; Alonso-delPino, M.; Cavallo, D.; Spirito, M.; Llombart, N.;
In European Conference on Antennas and Propagation,
Stockholm, Sweden, Mar. 30 - Apr. 4 2025.
Design of a Scannable Multi-Lens Quasi-Optical System for THz Near-Field Backhaul Communication
Zhang, H.; Bechrakis Triantafyllos, A.; Llombart, N.; Alonso-delPino, M.;
In 16th German Microwave Conference (GeMiC),
Dresden, Germany, pp. 619-621, 17-19 Mar. 2025. DOI: 10.23919/GeMiC64734.2025.10979179
A Core-Shell Lens for Antenna On-Package Integration at D-Band
Rooijen, Nick van; Alonso-delPino, Maria; Bueno, Juan; Bechrakis Triantafyllos, Alexandros; Sberna, Paolo M.; Spirito, Marco; Llombart, Nuria;
IEEE Trans. Antennas Propag.,
Volume 72, Issue 8, pp. 6195-6208, 2024. DOI: https://doi.org/10.1109/TAP.2024.3417628
On the Asymptotic Evaluation of the Radiative Near-Field in Resonant Leaky Wave Antennas Using a Nonuniform Phase Center: Application to Small Lenses
Bechrakis Triantafyllos, Alexandros; N. Llombart;
IEEE Trans. Antennas Propag.,
Volume 72, Issue 12, pp. 9534-9539, Dec. 2024. DOI: 10.1109/TAP.2024.3481650
A Core-Shell Lens for Antenna On-Package Integration at D-Band
Rooijen, Nick van; Alonso-delPino, Maria; Bueno, Juan; Bechrakis Triantafyllos, Alexandros; Sberna, Paolo M.; Spirito, Marco; Llombart, Nuria;
IEEE Transactions on Antennas and Propagation,
Volume 72, Issue 8, pp. 6195-6208, 2024. DOI: 10.1109/TAP.2024.3417628

Keywords: ...
Lenses;Antennas;Antenna feeds;Permittivity;Geometry;Bandwidth;Antenna arrays;D-band;dual-lens antenna;lens antenna;millimeter-wave antenna;on-package antenna.
On the asymptotic evaluation of the near-field in resonant leaky-wave antennas using a non-uniform phase center
Bechrakis Triantafyllos, Alexandros; Llombart, Nuria;
In 18th European Conference on Antennas and Propagation,
Glasgow, UK, Mar. 17-22 2024.
A Near-Field Quasi-Optical Measurement Technique for Probe-Fed High-Gain Backside-Radiating Antennas
Van Rooijen, Nick; Spirito, M.; Bechrakis Triantafyllos, A.; Llombart, N.; Alonso-delPino, M.;
In IEEE/MTT-S International Microwave Symposium - IMS,
Washington, DC, USA, pp. 904-907, Jun. 16-21 2024. DOI: 10.1109/IMS40175.2024.10600366
Measurements and Magnetic Cleanliness Assessment for Reaction Wheels on CubeSats
Mavropoulou, A.; Bechrakis Triantafyllos, A.; Baklezos, A. T.; Kapetanakis, T. N.; Vardiambasis, I. O.; Nikolopoulos, C. D.;
In 7th International Conference on Mathematics and Computers in Sciences and Industry (MCSI),
Athens, Greece, pp. 164-169, 22-24 Aug. 2022. DOI: 10.1109/MCSI55933.2022.00033
Towards the Prediction of SpaceWire Radiated Emissions Employing an LVDS Signal Emulator
Bechrakis Triantafyllos, A.; Mavropoulou, A.; Baklezos, T.; Capsalis, C. N.; Nikolopoulos, C. D.;
IEEE Access,
Volume 9, pp. 34090-34097, 2021. DOI: 10.1109/ACCESS.2021.3062166
EMC Assessment on SpaceWire Link ELF Magnetic Behavior for Modeling Purposes
Bechrakis Triantafyllos, A.; Mavropoulou, A.; Nikolopoulos, C. D.; Baklezos, A. T.; Capsalis, C. N.;
In 24th International Conference on Circuits, Systems, Communications and Computers (CSCC),
Chania, Greece, pp. 247-251, 2020. DOI: 10.1109/CSCC49995.2020.00052

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Last updated: 8 May 2026