靶场毫米波信号高灵敏度接收与测试新方法  

A Novel Approach of High Sensitivity Receiving and Testing for Range Millimeter-Wave Signal

作　　者：陈曦[1] 许建中[1] 吴礼[1] 杨健 

机构地区：[1]南京理工大学电子工程与光电技术学院 [2]解放军73691部队

出　　处：《电讯技术》2013年第2期209-213,共5页Telecommunication Engineering

基　　金：中国博士后科学基金资助项目(20100481151)~~

摘　　要：基于靶场毫米波测试中微弱信号(低至-128 dBm)检测的实际需求,通过信噪比分析,采用外差式宽带多通道快速扫频复合信道化技术,在W频段实现了-128 dBm接收灵敏度的测试系统。同时,设计了毫米波信标源并利用空间衰减理论,提出了一种W频段高灵敏度(-128 dBm)测试的新方法。理论分析表明,测试距离为290m、相应的衰减值约为-121.5 dB时,可提供一个功率最小达到-128 dBm的W频段毫米波信号源。利用标定后的毫米波信号源进行外场实际测量,证明了该测试方法的可行性。According to the actual demand of weak signal （as low as - 128 dBm） detection in millimeter-wave range test, through the analysis of signal-to-noise ratio（SNR）, the W-band receiver system with - 128 dBm sensitivity is realized by using the technology of super-heterodyne broadband multi-channel fast swept-frequency composite channelization. Meanwhile, the millimeter- wave calibration source is designed, and combined with the spatial attenuation theory, a new test method of the high sensitivity （ - 128 dBm） in W-band is put forward. Theoretical analysis shows that the minimum power of the millimeter-wave signal source can reach - 128 dBm in W-band when the test distance is 290 m and the corresponding attenuation value is about - 121.5 dB. The practical measurements using the calibrated millimeter-wave signal source demonstrate the feasibility of the proposed test method.

关 键 词：靶场测试 高灵敏度 毫米波源 空间衰减 微弱信号检测 W频段 信噪改善比 

分 类 号：TN06[电子电信—物理电子学] TN850.7