Abstract
This paper introduces a 2.4 GHz down-conversion quadrature mixer which applied in the Wireless Sensor Network (WSN). The mixer uses a folded structure which is modified based on the conventional Gilbert mixer. It is designed in 0.18μm RF CMOS process with a low supply voltage of 1V. The post-simulation results show that the mixer achieves a conversion gain (CG) of 9.0dB, the input 1dB compression point (IP1dB) of-7.6dBm, the third-order input intercept point (IIP3) of 2.2dBm, and the single side-band (SSB) noise figure (NF) is 13.9dB. The mixer core consumes current about 1.2mA from a 1V power supply.
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