Introduction
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, radio frequency identification (RFID) and wireless power transfer (WPT), flexible electronics, smart textiles, inkjet printing and 3D printing fabrication, carbon nanotube and graphene electronics and sensors, 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.
Scientific Publications & Patents
Books & Chapters
A. Georgiadis, A. Collado, Context Analysis, in Green RFID Systems, Chapter in Green RFID Systems, edited by Cambridge Univiversity Press, 2014. ISBN-13: 978-1107030404.
Journals
J. Kimionis, A. Georgiadis, A. Collado, M. Tentzeris, Enhancement of RF Tag Backscatter Efficiency with Low Power Reflection Amplifiers, IEEE Transactions on Microwave Theory and Techniques, Vol. 62, No. 12, pp. 3562-3571, December 2014.
K. Niotaki, A. Georgiadis, A. Collado, Dual-Band Resistance Compression Networks for Improved Rectifier Performance, IEEE Transactions on Microwave Theory and Techniques, Vol. 62, No. 12, pp. 3512-3521, December 2014.
K. Niotaki, A. Collado, A. Georgiadis, S. Kim, Solar/Electromagnetic Energy Harvesting and Wireless Power Transmission, Proceedings of the IEEE, Vol. 102, No. 11, pp. 1712-1722, November 2014.
S. Kim, R.Vyas, K. Niotaki, A. Collado, A. Georgiadis, M.M.Tentzeris, Ambient RF Energy-Harvesting Technologies for Self-Sustainable Standalone Wireless Sensor Platforms, Proceedings of the IEEE, Vol. 102, No. 11, pp. 1649-1666, November 2014 .
A. Georgiadis, C.Kalialakis, Evaluation of Error Vector Magnitude due to Combined IQ Imbalances and Phase Noise, IET Circuits, Devices and Systems, Vol. 8, No. 6, pp. 421-426, November 2014.
M. M. Tentzeris, A. Georgiadis, L. Rosseli, Energy harvesting and scavenging , Proceedings of the IEEE, Vol. 102, No. 11, pp. 1633-1634, November 2014.
C. Kalialakis, A. Georgiadis, The regulatory framework for wireless power transfer systems. Wireless Power Transfer, Wireless Power Transfer, Vol. 1, No. 2, pp. 108-118, September 2014.
M. Espinosa, B. G. M. de Oliveira, I. Llamas-Garro, M. T. de Melo, 2-Bit, 1-4 GHz Reconfigurable Frequency Measurement Device, IEEE Microwave and Wireless Components Letters, Vol. 24, No. 8, pp. 569-571, August 2014.
A. Collado, A. Georgiadis, Optimal Waveforms for Efficient Wireless Power Transmission, IEEE Microwave and Wireless Components Letters, Vol. 24, No. 5, pp. 354-356, May 2014.
A. Boaventura, A. Collado, A. Georgiadis, N. Borger Carvalho, Spatial Power Combining of Multi-Sine Signals for Wireless Power Transmission Applications, IEEE Transactions on Microwave Theory and Techniques, Vol. 62, No. 4, pp. 1022-1030, April 2014.
N. B. Carvalho, A. Georgiadis, A. Costanzo, H. Rogier, A. Collado, J.A. Garcia, Wireless Power Transmission: R&D Activities Within Europe, IEEE Transactions on Microwave Theory and Techniques, Vol. 62, No. 4, pp. 1031-1045, April 2014.
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, Journal of Applied Electromagnetics and Mechanics, Vol. 45, No. 1-4, pp. 235-240, April 2014.
K. Niotaki, A. Collado, A. Georgiadis, 5W GaN HEMT Power Amplifier for LTE, Radioengineering, Vol. 23, No. 1, pp. 338-34, April 2014.
K. Niotaki, F.Giuppi, A. Georgiadis, A. Collado, Solar/EM energy harvester for autonomous operation of a monitoring sensor platform, Wireless Power Transfer, Vol. 1, No. 1, pp. 44-50, March 2014.
L. Guenda, E.Santana, A. Collado, K.Niotaki, N.B.Carvalho, A. Georgiadis, Electromagnetic energy harvesting global information database, Wiley Transactions on Emerging Telecommunications Technologies, Vol. 25, No. 1, pp. 56-63, January 2014.
Conferences
B. G. M. de Oliveira, M. T. de Melo, I. Llamas-Garro, M.Espinosa, M. R. T de Oliveira, E.M.F de Oliveira, Integrated Instantaneous Frequency Measurement Subsystem Based on Multi-Band-Stop Filters, in Proceedings of Asia Pacific Microwave Conference (APMC 2014), 4-7 November 2014, Sendai (Japan).
A. Georgiadis, A. Collado, K.Niotaki, Optimal Signal Selection and Rectenna Design Challenges for Electromagnetic Energy Harvesting and Wireless Power Transfer, in Proceedings of 2014 Asia Pacific Microwave Conference (APMC 2014), 4-7 November 2014, Sendai (Japan).
A. Boaventura, N.B.Carvalho, A. Georgiadis, The Impact of Multi-sine Tone Separation on RF-DC Efficiency, in Proceedings of 2014 Asia Pacific Microwave Conference (APMC 2014), 4-7 November 2014, Sendai (Japan).
J. Rossello, F. Mira, A. Collado, A. Georgiadis, Substrate integrated waveguide aperture coupled patch antenna array for 24 GHz wireless backhaul and radar applications, in Proceedings of IEEE Conference on Antenna Measurements & Applications (CAMA), 16-19 November 2014, Antibes (France).
M. Espinosa, I. Llamas-Garro, B. G. M. de Oliveira, M. T. de Melo, J. Kim, A Comparison Between Fixed and Reconfigurable Frequency Measurement Circuits, in Proceedings of International Symposium on Information Technology Convergence (ISITC), 30-31 October 2014, Jeonju (Korea).
M. Espinosa, B. G. M. de Oliveira, I. Llamas-Garro, M. T. de Melo, J. M. Kim, 4-bit, 1 to 4 GHz Reconfigurable Discriminator for Frequency Measurement, In Proceedings of 44th European Microwave Conference (EuMW 2014), 5-10 October 2014, Rome (Italy).
M. Bozzi, F. Mira, A. Georgiadis, A novel multilayered SIW filter with two mono-modal cavities and three poles , In Proceedings of 44th European Microwave Conference (EuMW 2014), 5-10 October 2014, Rome (Italy).
A.Traille, S.Kim, A.Coustou, H.Aubert, M.Tentzeris, J.Kimionis, A. Georgiadis, A. Collado, Novel Inkjet Printed Modules for Sensing, Radar, and Energy Harvesting Applications, in Proceedings of European Microwave Conference (EUMC 2014), 5-10 October 2014, Rome (Italy).
J.Kimionis, A. Georgiadis, A. Collado, M.Tentzeris, Inkjet-Printed Reflection Amplifier for Increased Range Backscatter Radio, in Proceedings of European Microwave Conference (EUMC 2014), 5-10 October 2014, Rome (Italy).
C.Kalialakis, A. Collado, A. Georgiadis, Circularly Polarized Quadrifilar Antenna Array Using a Sequentially Rotated Feeding Network, in Proceedings of European Microwave Conference (EUMC 2014), 5-10 October 2014, Rome (Italy).
M. R. T. de Oliveira, L. S. A. Costa, M. T. de Melo, I. Llamas-Garro, Micromachined Impedance Transformer, in Proceedings of 16th Simpósio de Micro-ondas e Optoeletrônica – 11º Congresso Brasileiro de Eletromagnetismo (MOMAG Curitiba 2014), 31-3 September 2014, (Brasil).
M. Virili, A. Georgiadis, K.Niotaki, A. Collado, F. Alimenti, P. Mezzanotte, L. Roselli, N. B. Carvalho, Design and Optimization of an Antenna with Thermo-Electric Generator (TEG) for Autonomous Wireless Nodes, in Proceedings of 2014 IEEE RFID Technology and Applications (RFID-TA) , 8-9 September 2014, Tampere (Finland).
S. Rima, A. Georgiadis, A. Collado, R. Gonçalves, N.B. Carvalho, Passive UHF RFID Enabled Temperature Sensor Tag on Cork Substrate, in Proceedings of 2014 IEEE RFID Technology and Applications (RFID-TA) , 8-9 September 2014, Tampere (Finland).
C. Collado, E. Rocas, J. Verdú, J. Mateu, A. Hueltes, R. Aigner, A lateral modes model for BAW resonators , in Proceedings of IEEE International Ultrasonics Symposium Proceedings (IUS 2014), 3-6 September 2014, Chicago, Illinois (USA).
A. Georgiadis, Energy harvesting for Autonomous Wireless Sensors and RFID’s, in Proceedings of 2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS),16-23 August 2014, Beijing (China).
A. Georgiadis, A. Collado, K.Niotaki, Dual-band electromagnetic energy harvester with resistance compression network, in Proceedings of 2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 16-23 August 2014, Beijing (China).
A. Traille, A. Georgiadis, A. Collado, Y.Kawahara, H.Aubert, M.Tentzeris, Inkjet-printed “Zero Power” Wireless Sensor and Power Management Nodes for IoT and “Smart Skin” Applications, in Proceedings of 2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS),16-23 August 2014, Beijing (China).
M. Tentzeris, S.Kim, R. Vyas, A. Traille, P. Pons, H. Aubert, A. Georgiadis, A. Collado, Inkjet-printed “Zero Power” Wireless Sensor and Power Management Nodes for IoT and “Smart Skin” Applications, in Proceedings of 20th International Conference on Microwaves, Radar and Wireless Communication (MIKON), 16-18 June 2014, Gdansk (Poland).
J. Kimionis, A. Georgiadis, S. Kim, A. Collado, K. Niotaki, M.M. Tentzeris, An Enhanced-range RFID Tag Using an Ambient Energy Powered Reflection Amplifier, in Proceedings of International Microwave Symposium (IMS 2014), 1-6 June 2014, Tampa Bay (Florida).
K. Niotaki, A. Georgiadis, A. Collado, Dual-Band Rectifier Based on Resistance Compression Networks, in Proceedings of International Microwave Symposium (IMS 2014), 1-6 June 2014, Tampa Bay (Florida).
H. S. Kim, G.Y. Yun, S. H. Lee, I. Llamas-Garro, J. M. Kim, Inkjet-Printed Silver CPW with Narrow Gap, in Proceedings of 9th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (IEEE-NEMS), 13-16 April 2014, Hawaii (USA).
K. Niotaki, S. Kim, F. Giuppi, A. Collado, A. Georgiadis, M.M. Tentzeris, Optimized Design of Multi-band and Solar Rectennas, in Proceedings of Radio Wireless Week (RWW 2014), 19-23 January 2014, Newport Beach, CA (USA).
Patents
A. Georgiadis, A. Collado, Reflectarray Antenna System , International Application Nº: PCT/EP2009/061316. Granted patent: USA 9,048,544; ES2384836.