The 2019 edition of Prof. Durgin’s technical tutorial delivered at in Phoenix, AZ at the IEEE RFID 2019 conference. Download the slides here.
Cheng Qi and Coauthors Win Best Paper Award for IEEE RFID 2019
ECE PhD student Cheng Qi, along with co-authors Dr. Francesco Amato and Prof. Gregory D. Durgin, has won the Best Paper Award at the IEEE International Conference on RFID 2019. Held from April 2-4 in Phoenix, AZ, IEEE RFID 2019 is the world’s premier science and engineering conference for RF identification and related technologies.
Qi’s paper, entitled “Breaking the Range Limit of RFID Localization: Phase-based Positioning with Tunneling Tags”, presented a radically new way to do ultra-precise localization of a low-powered RFID tag. By using a Georgia Tech innovation — a quantum tunneling RFID tag — and a new algorithm to adjust for radio multiparty, Qi demonstrated centimeter-scale position location of a tag at tens of meters of range. The technique can work at hundreds-of-meters range and through walls as well.
It is uncomfortable to note that 3 of the last 4 best paper awards in the IEEE RFID conference series have been presented to GTPG papers.
Dr. Francesco Amato Wins Clive Hohberger Technology Award
Dr. Francesco Amato, currently at the University of Rome, was named the recipient of the inaugural Clive Hohberger Technology Award by the Advancing Identification Matters (AIM) industry organization. This award is given annually to scientists and engineers who are pioneers of disruptive technology in the RFID industry. Francesco was honored for his Georgia Tech PhD research in the field of Quantum Tunnel Reflectors (completed in 2017) which scatter signals to radios over remarkably long distances using very little power. The award was presented at the AIM partnership breakfast on Wednesday, April 3rd, 2019 during the RFID Journal LIVE! trade show in Phoenix, AZ. The photograph shows Francesco receiving the award from its namesake, Dr. Clive Hohberger.
From the AIM website:
The award was named to honor the lifetime contributions of Dr. Clive Hohberger, prolific inventor, collaborator and executive who has become an internationally renowned industry leader. It will recognize scientists, engineers, software developers or systems integrators for outstanding contributions that have furthered the growth of the industry through important applications and new technological developments.
Retrodirective Microwave Backscatter Tag
M. Alhassoun, M. Varner, G.D. Durgin. “Theory and Design of a Retrodirective Rat-Race-Based RFID Tag“, IEEE Journal on RFID, vol 3, no 1, March 2019, pp 25-34.
Movement toward mm-wave backscatter communications in radio-frequency identification (RFID) systems necessitates seeking designs that compensate for the path loss introduced by the radio channel. A viable, simple, and power-efficient solution is to equip RFID tags with retrodirective arrays, which guarantee reflection with maximal gain in the direction of incidence. In this paper, we build upon a previous work to design and implement an original retrodirective tag in which its feeding network is a properly terminated rat-race coupler. We start by deriving the required terminations that ensure retrodirectivity. Then, we build a retrodirective tag and experimentally compare its radar cross section to that of a single-antenna tag. The measurements reveal that the radar cross section of the proposed retrodirective tag is, on average, approximately 6 dB more than that of a single-antenna tag while both tags have the same field-of-view. From the promising results in this paper, the proposed design is a potential candidate for next-generation microwave and mm-wave RFID tags because it is compatible with low-power reflection amplifiers (e.g., tunnel diodes), it can implement multiple modulation schemes without changing the circuit layout, and it can be implemented using only a single RF switch.
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