The research activities within the Department of Microwave Systems and Nanotechnology focus on emerging communications and sensing technologies, with expertise covering a broad spectrum of frequencies from RF, microwave and millimeter wave, to sub-THz. The areas of applications address a number of sectors from telecommunications, automotive, space, defense, to health and biomedical, security and monitoring. The focus of our work includes energy harvesting systems and self-powered sensors, communication theory and random networks, radio frequency identification (RFID) and wireless power transfer (WPT), flexible electronics, smart textiles, inkjet printing fabrication and carbon nanotubes, substrate integrated waveguide technology, micromachining technology, RF-MEMS and solid state based reconfigurable microwave/millimeter-wave circuits, power amplifiers, and new electronic materials including multiferroics, superconductors and acoustic devices.
F. Mira, A. A. San Blas, V. E. Boria, L. J. Roglà, B. Gimeno, Wideband generalized admittance matrix representation for the analysis and design of waveguide filters with coaxial excitation, Radio Science, Vol. 48, No. 1, pp. 50-60, February 2013.
A. Boaventura, A. Collado, N. Borges Carvalho, A. Georgiadis, Optimum Behavior: Wireless Power Transmission System Design Through Behavioral Models and Efficient Synthesis Techniques, IEEE Microwave Magazine, Vol. 14, No. 2, pp. 26-35, April 2013 .
N. Michelusi, K.Stamatiou, M. Zorzi, Transmission policies for energy harvesting sensors with time-correlated energy supply, IEEE Transactions on Communications, Vol. PP, No. 99, pp. 1-14, May 2013.
T. Mikulasek, A. Georgiadis, A. Collado, J. Lacik, 2×2 Microstrip Patch Antenna Array Fed by Substrate Integrated Waveguide for Radar Applications, IEEE Antennas and Wireless Propagation Letters, No. 99, Vol. PP, pp.1, September 2013.
A. Collado, F. Mira, A. Georgiadis, Mechanically Tunable Substrate Integrated Waveguide (SIW) Cavity based Oscillator, IEEE Microwave and Wireless Components Letters, No. 23, Vol. 9, pp. 489-491, August 2013.
A. Collado, A. Georgiadis, Conformal Hybrid Solar and Electromagnetic (EM) Energy Harvesting Rectenna, IEEE Transactions on Circuits and Systems I, Vol. 60, No. 8, pp. 2225-2234, August 2013.
A. Georgiadis, RFID-Enabled Sensors and Technologies, From the Editor’s Desk, IEEE Microwave Magazine, Vol. 14, No. 5, pp. 24-25, August 2013.
S. Kim, C. Mariotti, F. Alimenti, P. Mezzanote, A. Georgiadis, A. Collado, L. Roselli, M.M. Tentzeris, No Battery Required: Perpetual RFID-Enabled Wireless Sensors for Cognitive Intelligence Applications, IEEE Microwave Magazine, Vol. 14, No. 5, pp. 66-77, July 2013.
S. Kim, B. Cook, T. Le, J. Cooper, H. Lee, V. Lakafosis, R. Vyas, R. Moro, M. Bozzi, A. Georgiadis, A. Collado, M.M. Tentzeris, Inkjet-printed Antennas, Sensors and Circuits on Paper Substrate, IET Microwaves Antennas and Propagation, Vol. 7, No. 10, pp. 858-868, July 2013.
K. Stamatiou, P. Casari, M. Zorzi, The throughput of underwater networks: analysis and validation using a ray-tracing simulator, IEEE Transactions on Wireless Communications, Vol. 12, No. 3, pp. 1108-1117, June 2013.
K. Niotaki, F. Giuppi, A. Collado, A. Georgiadis, A Broadband Power Amplifier Based on Composite Right/Left-Handed Half-Mode Substrate Integrated Waveguide, in Proceedings of The Conference on Design of Circuits and Integrated Systems (DCIS) , 27-29 November 2013, San Sebastian (Spain).
I. Kim, R. Vyas, M.M. Tentzeris, A. Georgiadis, A. Collado, Inkjet-printed RF Energy Harvesting and Wireless Power Trasmission Devices on Paper Substrate, in Proceedings of European Microwave Conference (EuMW 2013), 6-11 October 2013, Nuremberg (Germany).
S. Kim, H. Lee, A. Traille, Y. Kawahara, A. Georgiadis, A. Collado, H. Aubert, M.M. Tentzeris, Inkjet-printed Sensors on Paper Substrate for Agricultural Applications, in Proceedings of European Microwave Conference (EuMW 2013), 6-11 October 2013, Nuremberg (Germany).
F. Giuppi, K.Niotaki, A. Collado, A. Georgiadis, Challenges in Energy Harvesting Techniques for Autonomous Self-Powered Wireless Sensors, in Proceedings of European Microwave Conference (EuMW 2013), 6-11 October 2013, Nuremberg (Germany).
M. Tentzeris, S. Kim, A. Traille, H. Aubert, Y. Kawahara, A. Georgiadis, A. Collado, Inkjet-printed RFID-enabled sensors on paper for IoT and “Smart Skin” applications, In proceedings of 21st International Conference on Applied Electromagnetics and Communications (ICECom), 14-16 October 2013, Dubrovnik (Croatia).
B. G. M. de Oliveira, M. T. de Melo, G. G. Machado, I. Llamas-Garro, Compact Coplanar Interferometers for a 5-6 GHz IFM System, in Proceedings of 16th International Symposium on Applied Electromagnetics and Mechanics, 31-2 August 2013, Quebec (Canada).
I. Llamas-Garro, Micromachining and MEMS for millimeter-wave applications (invited talk), in Proceedings of SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, 4-7 August, 2013, Rio de Janeiro (Brazil).
I. A. Echearte Atienzar, D. Jiménez López, M. Gasulla, F. Giuppi, A. Georgiadis, A High-efficiency Matching Technique for Low Power Levels in RF Harvesting, in Proceedings of Progress In Electromagnitics Research Symposium (PIERS), 12-15 August 2013, Stockholm (Sweden).
Z. B.-Brito, I. Llamas-Garro, Ll. Pradell, F. Giacomozzi, S.Colpo, Frequency and Bandwidth Control of Switchable Microstrip Bandpass Filters using RF-MEMS Ohmic Switches, in Proceedings of the 14th International Symposium on RF-MEMS and RF-Microsystems, 1-3 July 2013, Potsdam, (Germany).
S. Kim, A. Traille, H. Aubert, A. Georgiadis, M. M. Tentzeris, A Dual-Band Retrodirective Reflector Array on Paper Utilizing Substrate Integrated Waveguide (SIW) and Inkjet Printing Technologies for Chipless RFID Tag and Sensor Applications, in Proceedings of 2013 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, 7-12 July 2013, Orlando (USA).
E. Rocas, C. Collado, J. Mateu, A. Hueltes, J. Verdu, J. C. Booth, R. Aigner, Performance of BAW Resonators at Cryogenic Temperatures, in Proceedings 2013 IEEE International Ultrasonics Symposium (IUS), 21-25 July 2013, Prague (Czech Republic).
S. Kim, Y. Kawahara, A. Georgiadis, A. Collado, M.M. Tentzeris, Low-Cost Inkjet-Printed Fully Passive RFID Tags Using Metamaterial-inspired Antennas for Capacitive Sensing Applications, in Proceedings of IEEE MTT-S International Microwave Symposium (IMS 2013), 2-7 June 2013, SeaTtle (US).
A. Collado, A. Georgiadis, 24 GHz Substrate Integrated Waveguide (SIW) Rectenna for Energy Harvesting and Wireless Power Transmission, in Proceedings of IEEE MTT-S International Microwave Symposium (IMS 2013), 2-7 June 2013, SeaTtle (US).
S. Kim, B. Cook, J. Cooper, A. Traille, A. Georgiadis, H. Aubert, Manos M. Tentzeris, Inkjet-printed Substrate Integrated Waveguide (SIW) Passive Dual-band Retro-directive Array on Paper substrate for Chipless RFID Tag and Sensor Applications, , in Proceedings of IEEE MTT-S International Microwave Symposium (IMS 2013), 2-7 June 2013, SeaTtle (US).
A. Georgiadis, A. Collado, Mode Locked Oscillator Arrays for Efficient Wireless Power Transmission, in Proceedings of 2013 IEEE Wireless Power Transfer Conference (WPTC), 15-16 May 2013, Perugia (Italy).
A. Georgiadis, A. Collado, Solar Powered Class-E Active Antenna Oscillator for Wireless Power Transmission, in Proceedings of 2013 IEEE Radio and Wireless Week, 20-23 January 2013, Austin, TX (USA).
K. Niotaki, A. Georgiadis, A. Collado, Thermal Energy Harvesting for Power Amplifiers, in Proceedings of 2013 IEEE Radio and Wireless Week, 20-23 January 2013, Austin, TX (USA).
A. Georgiadis, A. Collado, Reflectarray Antenna System , International Application Nº: PCT/EP2009/061316. Granted patent: ES2384836.