Optimum ON/OFF resistances of the ASK modulator for passive RFID tags

In this paper, we propose optimized ON/OFF resistances for the backscattering amplitude-shift keying (ASK) modulator for a passive RFID tag considering the effective backscattered power level. Based on an analysis of power transfer between the passive RFID tag and reader, we obtain the optimal condition for the ASK modulator to maximize the harvestable power. We calculate the performance of the proposed modulator configuration that is superior to the conventional scheme.

[1]  Martin Fischer,et al.  Fully integrated passive UHF RFID transponder IC with 16.7-μW minimum RF input power , 2003, IEEE J. Solid State Circuits.

[2]  P.V. Nikitin,et al.  Theory and measurement of backscattering from RFID tags , 2006, IEEE Antennas and Propagation Magazine.

[3]  G. Iannaccone,et al.  Design criteria for the RF section of UHF and microwave passive RFID transponders , 2005, IEEE Transactions on Microwave Theory and Techniques.

[4]  P.V. Nikitin,et al.  Performance limitations of passive UHF RFID systems , 2006, 2006 IEEE Antennas and Propagation Society International Symposium.