Energy Harvesting and Wireless Power Transfer for RFID and Wireless Sensors
Date of original webcast: Wednesday, July 12, 2017
Duration: 1 hour
RFID technology provides a foundation, an enabling technology towards the realization of ‘zero-power’ wireless sensors and implementing the Internet-of-Things (IoT) and machine-to-machine (M2M) communication. Interest in RFID technology is further enhanced by its fundamental capability for wireless powering of devices, allowing for battery-less operation. The presentation begins with an overview of ambient energy availability and energy harvesting technology challenges for low power circuits and sensors. Design challenges and novel technologies and materials, such as paper, textiles, and inkjet/3D printing are highlighted. Special focus is placed on electromagnetic energy transfer and harvesting for range maximization of passive RFID systems. Rectenna design and optimization under different operating conditions and in different operating frequencies from HF to millimeter waves is addressed. Multiple technology harvesters leading to the development of energy harvesting assisted RFIDs are discussed. Low profile and conformal solar antennas and solar–electromagnetic harvesters including examples implemented on paper and textile substrates are presented. The integration of an antenna with a thermo-electric generator is demonstrated. Waveform optimization in wireless power transfer is addressed, and the ability to improve the RF-DC power conversion efficiency of electromagnetic energy harvesting devices by tailoring the characteristics of the transmitted signals is discussed. The last part of the talk presents application examples including wireless sensors powered from solar and electromagnetic energy harvesting, millimeter wave back-scattering, solar energy harvesting for RFID tags and sensors based on ambient backscattering.
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Apostolos Georgiadis was born in Thessaloniki, Greece. He received the Ph.D. degree in electrical engineering from the University of Massachusetts, Amherst, in 2002. He is Associate Professor at Heriot-Watt University, Edinburgh, UK. He has been involved for more than 20 years in the field of RF/microwave wireless systems and his research interests include energy harvesting and wireless power transmission and more recently inkjet and 3D printed electronics. He serves as an Associate Editor of the IEEE Journal on RFID and he is the founder and Editor in Chief of the Wireless Power Transfer journal by Cambridge University Press. He is a EU Marie Curie Global Fellow. He has published more than 160 papers in peer reviewed journals and international conferences. In 2016 his proposal for Inkjet/3D printed millimeter wave systems received the Bell Labs Prize, 3rd place among more than 250 proposals recognizing ideas that ‘change the game’ in the field of information and communications technologies.
Michael C. Hamilton, Ph.D.
Dr. Michael C. Hamilton is an Associate Professor in the Electrical and Computer Engineering Deptartment at Auburn University and the Assistant Director of the Alabama Microelectronics Science and Technology Center.