基于北斗、GPS双模双通道的镜像抑制接收机射频前端设计

This paper introduces a fully integrated low power consumption radio receiver frontend circuit for a Compass(Beidou) and GPS dual mode dual channel system with 2.5 dB NF,1.02 mm~2 areas,and 8 mA of current in 0.18μm TSMC CMOS process.Except for a few passive components for input matching,other components such as an off-chip low noise amplifier or a balun are not required.With a non-tunable passive image rejection filter,the receiver frontend can achieve around 60 dB gain and 34 dB image rejection.