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Article Dans Une Revue IEEE Antennas and Wireless Propagation Letters Année : 2019

Time Reversal Processing for Downlink Limited Passive UHF RFID in Pulsed Wave Mode

Résumé

This letter provides experimental evidences that, in a complex environment, a time reversal processing of electromagnetic waves can increase the energy efficiency of the reader to tag communication and, hence, can increase the activation range of a passive UHF RFID system. A first experiment performed in a free space environment shows that in addition to the classical continuous wave (CW) mode, a type AD222 passive UHF RFID tag can successfully operate in a pulsed wave (PW) mode using pulses with half-width 5 ns and period 35 ns. In a second experiment performed in a complex multipath environment, it is shown that the energy efficiency of the RFID system in PW mode can be increased by applying a TR processing strategy. Further, it is shown that both PW and TR strategies involve less energy to activate the tag than does the classical CW mode. As a consequence, given a fixed amount of energy, TR processing can increase the activation range of the RFID system.
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Dates et versions

hal-02297868 , version 1 (26-09-2019)

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Mingshan Zhang, Chengran Fang, Pavlos Doanis, Julien Huillery, Arnaud Bréard, et al.. Time Reversal Processing for Downlink Limited Passive UHF RFID in Pulsed Wave Mode. IEEE Antennas and Wireless Propagation Letters, 2019, pp.1-1. ⟨10.1109/LAWP.2019.2943211⟩. ⟨hal-02297868⟩
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