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Simple Test and Modeling of RFID Tag Backscatter



Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri, Aniwar Ibrahim, Zoya Popovic


We consider here worst-case analysis of backscatter from passive radio frequency identification (RFID) tags. The basis is a figure of merit "B" to relate link power at reader ports to tag circuit parameters. A minimum bound for received monostatic backscatter can be determined by inspection from measured. The bound is general for narrowband signals in any causal linear propagation. For an assembled tag, this minimum varies only with reader transmit power, tag antenna tuning, and chip power sensitivity of different commands. To validate this model, we propose a backscatter calibration device to enable measurements with estimated 0.5 dB uncertainty. We then demonstrate how the minimum bound can inform reader sensitivity specification to help ensure reliable inventory performance.
IEEE Transactions on Microwave Theory and Techniques


Backscatter, power harvesting, radio frequency identification (RFID), ultrahigh frequency (UHF)


Kuester, D. , Novotny, D. , Guerrieri, J. , Ibrahim, A. and Popovic, Z. (2012), Simple Test and Modeling of RFID Tag Backscatter, IEEE Transactions on Microwave Theory and Techniques, [online], (Accessed May 22, 2024)


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Created July 1, 2012, Updated January 27, 2020