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Andia Vera G, Duroc Y, Tedjini S. 2014. Analysis and exploitation of harmonics in wireless power transfer (H-WPT): passive UHF RFID case. Wireless Power Transfer 1(2): 65-74 doi: 10.1017/wpt.2014.11 
Analysis and exploitation of harmonics in wireless power transfer (H-WPT): passive UHF RFID case
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Author Bio:
Gianfranco Andía Vera He was born in Puno, Peru, in 1986. He received the engineering degree from the Escola Tècnica Superior d'Enginyeria de Telecomunicació de Barcelona – ETSETB at the Universitat Politecnica de Catalunya-UPC in 2009. He received his master degree in Development and Management on Information Technologies, in 2010 also by UPC. From May 2010 to September 2011 he worked as an engineer in a carrier telecom in Barcelona, Spain on the planning of wireless networks to distribute VoIP and IP services. In October 2011, he has joined the Laboratoire de Conception et d'integration des Systemes LCIS Valence, France where he is currently pursuing a Ph.D. diploma at the Grenoble Institute of Technology. His primary interest includes RFID, antennas, energy harvesting, wireless networks, and microwave devices. 
Yvan Duroc He received the Teaching degree Agregation (French national degree) in applied physics in 1995, the Ph.D. degree in electrical engineering from the Grenoble Institute of Technology in 2007 and the HDR degree (Habilitation à Diriger des Recherches) from the Grenoble University in 2012. He was a Teaching Associate with Esisar Engineering School from 1997 to 2009, where he was an Associate Professor from 2009 to 2013. Since 2013, he has been a Professor with the University Claude Bernard Lyon 1, France. He is In-charge of lectures in signal and image processing, electronics, RF, and embedded systems for the engineer and M.Sc. levels. His current research interests include microwave and signal processing with special attention to radio frequency identification, ultrawideband, and radio cognitive technologies. Professor Duroc is the Vice President of the URSI Commission C, France. 
Smail Tedjini He received Doctorate in Physics, from Grenoble University in 1985, and became full Professor in 1993. His main topics of interest are electromagnetism, RF, Wireless, and optoelectronics. His current research concerns wireless systems in particular RFID. He is the founder and past Director of LCIS Laboratory. Actually, he is the ORSYS group leader. He supervised more than 30 Ph.D. and has more than 300 research publications. He served as the Examiner/reviewer for tens of Ph.D. for different universities (France, Germany, Italy, Vietnam, Australia, Singapore, India, Brazil, Maghreb, etc.). He is the Member of several TPC and serves as the expert for international scientific committees and conferences, including ISO, Piers, IEEE, URSI, and EuCap. He organized several conferences/workshops. Past President and founder of the IEEE-CPMT French Chapter, the Vice-President of IEEE France Section and the Chair of URSI Commission D for the Triennium from 2011 to 2014 - Corresponding author: G. Andia Vera Email: gianfranco.andia-vera@lcis.grenoble-inp.fr
Abstract: This paper discusses novel methodologies for the characterization of harmonic signals generated by wireless powered devices, i.e. passive ultra-high frequency (UHF) radio frequency identification (RFID) tags, due to the wireless power transferred from reader to tag. Theoretical aspects, as well as measurements to characterize these non-linear phenomena are exposed. Particular care is taken to explain the analysis methodology and setup for two kinds of characterization measurements: radiated and conducted. The existence of harmonic signals carrying information is exploited in an advanced application example. A dual-band RFID tag is designed to increase the backscattered harmonic level in the tag-to-reader link. Measurement of this dual band tag demonstrates the exploitation of the hitherto neglected harmonic power; it also opens the door to more advanced applications exploiting the harmonic-link communication.
