C波段镜像抑制混频器的设计  

Design of C band mirror image rejection mixer

作　　者：于涛 冯帆 杜洪军 YU Tao;FENG Fan;DU Hongjun(No.29 Institute of China Electronics Technology Group Corporation,Chengdu 610036,China;The Third Chengdu Military Representative Office of Rocket Force Equipment Department,Chengdu 610052,China)

机构地区：[1]中国电子科技集团公司第二十九研究所,四川成都610036 [2]火箭军装备部驻成都地区第三军事代表室,四川成都610052

出　　处：《电子元件与材料》2020年第9期67-71,共5页Electronic Components And Materials

摘　　要：针对超外差接收机宽频带、通用化、小型化等发展趋势,提出了一种C波段镜像抑制混频器设计方案。该方案选用砷化镓高集成混频芯片HMC525LC4和中频正交混合电桥SLQ-302作为混频器主要组成部分,较传统的设计方法大幅度地减小了电路尺寸,保证电路有较好的相位平衡度和幅度平衡度,在设计上保证了较好的镜像抑制度。测试结果表明,该镜像抑制混频器的性能指标良好,在5~8 GHz的输入信号频率范围内,其镜像抑制度指标大于32 dB,插入损耗小于9 dB,通过选择不同频段的中频正交混合电桥可灵活应用于不同的超外差接收机。Aiming to broadband,universalization,miniaturization trend of superheterodyne receiver,a design of C band mirror image rejection mixer was proposed.GaAs highly integrated mixer chip HMC525 LC4 and intermediate frequency quadrature hybrid SLQ-302 were used as major components of the mirror image rejection mixer in order to reduce the circuit size and realize the phase balance and amplitude balance,resulting in better mirror image rejection.The test results show that the performance of the mirror image rejection mixer is good.The mirror image rejection is better than 32 dB and the insertion loss is less than 9 dB for the input signal with the frequency range of 5-8 GHz.This mirror image rejection mixer can be flexibly applied to different superheterodyne receiver by selecting different intermediate frequency quadrature hybrid.

关 键 词：镜频干扰 镜像抑制 超外差接收机 混频芯片 相位平衡度 幅度平衡度 

分 类 号：TN773[电子电信—电路与系统]