Title :
An improved RF front-end of UHF RFID
Author :
Liu, Lei ; You, Bin ; Wen, Xuan
Author_Institution :
Key Lab. of RF Circuits & Syst. of Minist. of Educ., Hangzhou Dianzi Univ., Hangzhou, China
Abstract :
The circulator is usually used in UHF RFID front end circuit to isolate the leakage from Tx to Rx, however, due to the insufficient of the circulator in isolation, there is still a lot of CW signal leaking into the Rx circuit inevitably. LNA is abnegated in order to prevent the demodulator from saturation, which will degrade the receive sensitivity and the dynamic range of the receive circuit. A case that can increase the isolation was proposed, which can also upgrade the architecture of the Rx. A design of LNA was simulated and accomplished in the basement of UHF RFID practice.
Keywords :
UHF amplifiers; low noise amplifiers; radiofrequency identification; CW signal leaking; LNA; UHF RFID front end circuit; dynamic range; receive circuit; receive sensitivity; Circuit simulation; Circuits and systems; Continuing education; Degradation; Demodulation; Laboratories; Phase shifters; Radio frequency; Radiofrequency identification; UHF circuits;
Conference_Titel :
Microwave and Millimeter Wave Technology (ICMMT), 2010 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-5705-2
DOI :
10.1109/ICMMT.2010.5524750
