Demodulator for multi-carrier UHF RFID tags

A multi-carrier UHF RFID system provides the required power of a passive tag via multiple carriers. It is proved that the method can effectively extend the tag access range since the tag operating power is almost always satisfied. However, the extension is confined due to waveform distortion of read...

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Bibliographic Details
Published in2013 IEEE International Symposium on Consumer Electronics (ISCE) pp. 5 - 6
Main Authors Ming-Hsien Lee, Chia-Yu Yao, Naim, Muhammad Khaerul, Hsin-Chin Liu
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2013
Subjects
Band-pass filters
Demodulation
Envelope detectors
Passive RFID tags
RF signals
SAW filters
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Summary:A multi-carrier UHF RFID system provides the required power of a passive tag via multiple carriers. It is proved that the method can effectively extend the tag access range since the tag operating power is almost always satisfied. However, the extension is confined due to waveform distortion of reader command at the tag's demodulator. This work discusses this problem and proposes a solution by adding an additional bandpass filter before the envelope detector. Computer simulation results show that the proposed solution effectively mitigates the demodulation problem.
ISBN:1467361984
9781467361989
ISSN:0747-668X
2159-1423
DOI:10.1109/ISCE.2013.6570247