Quad-channel broadband compact multi-antenna GNSS down-converter for high-reliability navigation  

作　　者：Riyan Wang Bin Li Hongyin He Kunming Yang Wei Feng Zhijian Chen 

机构地区：[1]School of Microelectronics,South China University of Technology,Guangzhou 510640,Guangdong,China [2]Guangzhou Runxin Information Technology Co.,Ltd,Guangzhou 510663,Guangdong,China

出　　处：《Transportation Safety and Environment》2023年第4期100-106,共7页交通安全与环境（英文）

基　　金：supported by the Key-area Research and Development Program,Guangdong Province of China(Grants No.2019B010141002 and 2020B0404030005).

摘　　要：A high-reliability broadband high-linearity down-converter for multi-antenna global navigation satellite system(GNSS)receiver is presented in this paper.Based on direction-of-arrival estimation,the multi-antenna GNSS receiver can separate the GNSS signals from the interfering signals and suppress harmful broadband radio frequency interferences.To drive the off-chip 50Ω2 resistive load and meet the stringent requirements of linearity,a quad-channel down-converter with a broadband common-gate low-noise transcon-ductance amplifier,current-driven passive mixer and novel bridge mode transimpedance driving amplifier have been proposed to contruct the multi-antenna recelver.The operating frequency of this down-converter is from 1.15 to 1.65 GHz,covering all bands for global positioning system(GPS),Beidou navigation satellite system(BDS),global navigation satellite system(GLONASS)and Galileo.The measured results show that the proposed quad-channel down-converter achieves+38 dBm output 3rd order intercept point(OIP3)and+17 dBm OP1dB(output-referred 1 dB compression point),9.5 dB to 12.9 dB noise figure(NF)across the variable gain of 10 dB to 27 dB and approximately 47 dB channel isolation.

关 键 词：DOWN-CONVERTER radio frequency(RF)front-end multi-antenna receiver quad-channel global navigation satellite system(GNSS) BROADBAND 

分 类 号：TN967.1[电子电信—信号与信息处理] V249.3[电子电信—信息与通信工程]