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A Novel Carrier Leakage Suppression Front-End for UHF RFID Reader
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- Authors
- Jae-Young Jung, Chan-Won Park, Kyung-Whan Yeom
- Issue Date
- 2012-05
- Citation
- IEEE Transactions on Microwave Theory and Techniques, v.60, no.5, pp.1468-1477
- ISSN
- 0018-9480
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- In this paper, a novel carrier leakage suppression (CLS) front-end for UHF RF identification (RFID) reader is presented. We demonstrated through experiment in the laboratory environment that the proposed CLS front-end has a significant improvement in the carrier-to-data ratio by more than 36 dBc in the UHF RFID frequency band. When inserted between the antenna and a Class-1 RFID reader, measurements show that the reader can successfully demodulate the generated tag signal for a power level of -80 dBm, which corresponds to the backscattered power at 20-m distance. The read range of the reader with the proposed CLS front-end is verified again in an indoor environment. The measured read range is found to be about 23 m for a commercial battery-assisted passive (BAP) tag. We showed that a Class-3 RFID system for a long read range of 20 m can be successfully established with BAP tags and the Class-1 reader with the proposed CLS front-end. © 2012 IEEE.
- KSP Keywords
- Carrier leakage suppression, Front-End, Indoor Environment, Long read range, Power Levels, RF identification(RFID), RFID system, Tag Signal(TS), UHF RFID Reader, backscattered power, frequency band