Title :
A design of RF receiving circuit of RFID reader
Author :
Zhang, Jianming ; Xie, ZeMing ; Lai, Shengli ; Wu, Zehai
Author_Institution :
Coll. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China
Abstract :
A design method of the received radio circuit of a radio frequency identification (RFID) reader is introduced, which works in the 915MHz ISM frequency. Because the RFID tag uses back-scattered modulation signal to communicate with reader, and the back-scattered signal much weaker than transmitted signal of the reader, to receive back-scattered signal while transmit is the key problem. To solve it a multichannels receiver is used. It can eliminate blind spot, and improve its sensitivity. A lumped-distributed low-pass filter with high frequency capacitance is present. It rejects unwanted harmonic frequency, and has low insertion loss, small dimension and low cost.
Keywords :
backscatter; low-pass filters; radio receivers; radiofrequency identification; 915 MHz; ISM frequency; RF receiving circuit; RFID reader; backscattered modulation signal; blind spot; frequency capacitance; harmonic frequency; lumped-distributed low-pass filter; multichannels receiver; radio frequency identification; transmitted signal; Capacitance; Costs; Design methodology; Insertion loss; Low pass filters; Power harmonic filters; RFID tags; Radio frequency; Radiofrequency identification; Radiofrequency integrated circuits;
Conference_Titel :
Microwave and Millimeter Wave Technology, 2004. ICMMT 4th International Conference on, Proceedings
Print_ISBN :
0-7803-8401-6
DOI :
10.1109/ICMMT.2004.1411552
