24GHz高线性低功耗CMOS混频器的设计  

Design of 24GHz high linearity low power CMOS mixer

作　　者：王巍[1] 曾勇[1] 彭能[1] 王宁[1] 王颖[1] 阮巍[1] 谭菲[1] 

机构地区：[1]重庆邮电大学光电学院,重庆400065

出　　处：《传感器与微系统》2011年第1期90-93,共4页Transducer and Microsystem Technologies

摘　　要：采用一种新颖的前馈补偿差分跨导结构和LC-tank折叠共源共栅技术设计了一种适用于汽车防撞雷达系统前端的24 GHz高线性低功耗CMOS下变频混频器,详细分析了Gilbert单元混频器的线性度指标和其优化技术。该混频器工作电压为1.8 V,射频信号为24.0 GHz,中频信号为100 MHz,采用TSMC 0.18μm RF CMOS工艺实现了电路仿真和版图的设计,仿真结果表明:该混频器IIP3可达4 dBm,增益为-9.2 dB,功耗为5.7 mW。A feedforward compensated differential transconductor and LC-tank folded-cascode structure are used to design a 24 GHz high linearity low power consumption down conversion mixer which is used to automotive anticollision radar system. The Gilbert cell mixer＇ s linearity and the optimization technology are detailed analyzed. This circuit is simulated with TSMC 0.18 μm RF CMOS process, and the layout is designed. The suppling voltage is 1.8 V, a RF signal is 24.0 GHz and an IF frequency is 100 MHz. The simulation results show that the IIP3 of the proposed structure can achieve 4dBm, gain is -9.2 dB and power consumption is 5.7 mW.

关 键 词：下变频混频器 K频段 CMOS 线性度 低功耗 

分 类 号：TN957.5[电子电信—信号与信息处理]