Title :
A Multi-Carrier UHF Passive RFID System
Author :
Liu, Hsin-Chin ; Chen, Yung-Ting ; Tzeng, Wen-Shin
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei
Abstract :
The "Gen2 " specification for UHF passive RFID system released by EPCglobal has become an intense research interest. A Gen2 tag derives its power from the RF wave emitted by a Gen2 RFID reader and responds its modulated backscatter signals to the reader. Due to the large propagation loss, the accessible range of a Gen2 tag is hence limited. Moreover, the readability of a Gen2 tag is often influenced by the multipath fading problem. In this paper we propose a multi-carrier UHF passive RFID system that can effectively extend the accessible range of a Gen2 tag. In addition, we investigate the multi-band backscatter property of Gen2 tags, which can be utilized to mitigate the multipath fading problems
Keywords :
UHF devices; backscatter; fading; modulation; radiofrequency identification; EPCglobal; Gen2 specification; RF wave; multiband backscatter property; multicarrier UHF passive RFID system; multipath fading problem; Backscatter; Equations; Fading; Impedance; Passive RFID tags; Propagation losses; RF signals; Radio frequency; Radiofrequency identification; Receiving antennas;
Conference_Titel :
Applications and the Internet Workshops, 2007. SAINT Workshops 2007. International Symposium on
Conference_Location :
Hiroshima
Print_ISBN :
0-7695-2757-4
Electronic_ISBN :
0-7695-2757-4
DOI :
10.1109/SAINT-W.2007.9
