Design and Evaluation of a Multi-modulation Retrodirective RFID Tag

Mohammad Alhassoun; Michael A. Varner; Gregory D. Durgin
2018 IEEE International Conference on RFID, Orlando, FL, April 2018

This paper is Mohammad Alhassoun’s award-winning idea for an RFID tag exhibits retrodirectivity. Unlike previous designs, this scheme can be implemented by a single chip that alternately load-modulates two inner ports of a rat-race hybrid.  Previous retrodirective designs have all required switches and electronics at multiple locations to reconfigure the structure, which greatly increases the cost of production.

IEEE Virtual Journal on RFID — Issue 15

Editorial Note: This issue is part three in a three part series on the future of physical layers for RFID. In this part the following topics are covered: (1) Fine-scale Motion Capture: RFID Systems Achieve Millimeter-level Accuracy, and (2) The ComSoc Roundup: Selected Recent RFID Papers from IEEE Communications Society.

IEEE Virtual Journal on RFID — Issue 14

Editorial Note: This issue is part two in a three part series on the future of physical layers for RFID. In this part the following topics are covered: (1) Propagating on Objects: Wideband Antennas Resist On-Object Degradation, and (2) The Next Frontier: Millimeter-Wave Backscatter Communication.

IEEE Virtual Journal on RFID — Issue 13

Editorial Note: This issue is part one in a three part series on the future of physical layers for RFID. In this part the following topics are covered: (1) Resurrection of the Esaki Diode: Tunneling Becomes Cool Again, and (2) Retrodirectivity for RFID: Orientation-Independent Tag Design with Gain.