A 1.65mW Direct-Conversion Receiver for UHF RFID Readers

摘要

A 900MHz direct-conversion receiver for UHF RFID readers with low power, high linearity, and low noise in UMC 0.18μm CMOS technology is proposed. This receiver possesses VQ two paths and each path consists of a passive mixer, an IF amplifier, a RC low-pass filter and a comparator. It supports a LO frequency from 860MHz to 960MHz and a data rate from 40kb/s to 1Mb/s which are in accordance with the requirements of global UHF RFID specifications. The simulation results show that the input 1dB compression point is +5dBm, and the noise figure is 6.88dB. The sensitivity of this receiver is -70dBm with a power consumption of only 1.65mW. The layout area is 1.9mm×0.75mm.