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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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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Abstract 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.
AbstractList 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.
Author Naim, Muhammad Khaerul
Ming-Hsien Lee
Hsin-Chin Liu
Chia-Yu Yao
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  surname: Chia-Yu Yao
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  organization: Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
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  organization: Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
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  surname: Hsin-Chin Liu
  fullname: Hsin-Chin Liu
  organization: Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
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Snippet 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...
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StartPage 5
SubjectTerms Band-pass filters
Demodulation
Envelope detectors
Passive RFID tags
RF signals
SAW filters
Title Demodulator for multi-carrier UHF RFID tags
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