White Paper: RFID Radio Circuit Design In CMOS

In this paper we discussed the design and simulation of a UHF RFID tag and system that complies with the EPCglobal, Class-1, Generation-2 specifi cation. It was found that circuit performance on par with modern commercial RFID tag chips was achieved using the TSMC 0.18µm CMOS process. The paper included an antenna design that provides conjugate match with the input impedance of the rectifier. The paper closed with a top-level verifi cation that combines behavioral modeling, HFSS antenna system modeling, plus Nexxim transient simulation, showing that the design provides reliable DC power and demodulated signals for both uplink and downlink. Submitted by Ansoft Corporation