A Cancellation Technique of TX Leakage Signal for Emhanced Readability in UHF-band RFID Readers 


Vol. 36,  No. 5, pp. 543-550, May  2011


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  Abstract

In order to improve readability, a leakage-signal canceller has been proposed in UHF-band RFID readers. The proposed canceller is composed of two blocks: an environment monitoring block for detection of Tx and RX power levels and a leakage cancellation block. The leakage canceller consists of directional-couplers, digital attenuators and phase shifters based on the feed-forward scheme. The leakage canceller is located between antenna and reader. An improved experimental characterization of the scheme is presented with results from the reader operating in the Korean RFID frequency band, conforming the validity of the approach with more than 29 ㏈ of leakage cancellation.

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  Cite this article

[IEEE Style]

E. Noh, J. Lee, N. Kim, C. Kim, "A Cancellation Technique of TX Leakage Signal for Emhanced Readability in UHF-band RFID Readers," The Journal of Korean Institute of Communications and Information Sciences, vol. 36, no. 5, pp. 543-550, 2011. DOI: .

[ACM Style]

Eui-ho Noh, Jong-hyuk Lee, Nam-yoon Kim, and Chang-woo Kim. 2011. A Cancellation Technique of TX Leakage Signal for Emhanced Readability in UHF-band RFID Readers. The Journal of Korean Institute of Communications and Information Sciences, 36, 5, (2011), 543-550. DOI: .

[KICS Style]

Eui-ho Noh, Jong-hyuk Lee, Nam-yoon Kim, Chang-woo Kim, "A Cancellation Technique of TX Leakage Signal for Emhanced Readability in UHF-band RFID Readers," The Journal of Korean Institute of Communications and Information Sciences, vol. 36, no. 5, pp. 543-550, 5. 2011.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880