摘要
Abstract
In response to the urgent demand for low cost and high integration in the application of vehicle mounted millimeter-wave phased array radar,a K-band frequency modulated continuous wave(FMCW)radar receiver front-end implemented in 180 nm complementary metal oxide semiconductor(CMOS)process is presented.The receiver with two channels is realized by zero-IF architecture considering system complexity.Various gain-boosting techniques are introduced to maintain sufficient link gain in the K-band.In this design,a fully compact and symmetrical topology structure for passive network is adopted to reduce the local oscillator(LO)feed-through and output signal I/Q imbalance.Moreover,a novel phase compensation circle is also implemented for further obtaining high precise IQ output signal,which has the advantages of simple implementation structure,strong process robustness,minimal impact on output amplitude consistency during adjustment,and occupying no additional chip area.According to the measurement results,the receiver achieves a conversion gain of 21.7 dB with dual-channel imbalance less than 0.3 dB,an I/Q output phase error less than 2° without tuning and less than 0.5° after compensation in 22.5～26.5 GHz.The whole chip occupies a silicon area of 2.3 mm×1.4 mm including all pads and consumes a total DC power of 142 mW.关键词
车载毫米波雷达/相控阵/硅基射频芯片/正交相位补偿/紧凑型全对称拓扑设计Key words
vehicle mounted millimeter-wave radar/phased array/RF CMOS chip/IQ phase compensation/compact and symmetrical design分类
电子信息工程
