A Study on Multi-Carrier Transceiver for UHF Passive RFID Systems

• Main Authors: Yung-Ting Chen, 陳勇廷
• Other Authors: Hsin-Chin Liu
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/upb99y

碩士 === 國立臺灣科技大學 === 電機工程系 === 94 === In this thesis, we propose a new multi-band passive radio frequency identification system in which a reader is composed of a transceiver and a continuous wave emitter (CWE). The CWE is closer to tags than the transceiver. The CWE provides the required power of a passive tag by charging electronic microchip within tags using carrier frequency fc. The Reader-to-Tag command at carrier frequency ft is transmitted to tags by the transceiver. The two carrier frequencies fc and ft can be at the same or different. In this thesis, the frequency differences between the transceiver and the CWE, maximal readable distance, the required modulation depth of reader command are analyzed based on empirical results. Taking the advantages of the accessible range extension and the multi-band backscattering, the proposed scheme can achieve higher SNR and better anti-fading ability. Furthermore, the power consumption of the transceiver in this new RFID system can be less than an ordinary integral reader.