非调制连续微波雷达发射机泄漏影响研究  

Research on the effect of transmitter leakage in non-modulated continuous microwave radar

作　　者：郑大青[1] 陈伟民[1] 章鹏[1] 李存龙[1] 

机构地区：[1]重庆大学光电技术及系统教育部重点实验室,重庆400044

出　　处：《仪器仪表学报》2014年第4期775-780,共6页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51078369);中央高校基本科研业务费科研专项(CDJXS10120002)资助项目

摘　　要：为降低非调制连续微波雷达发射机泄漏对测量的影响,从发射微波信号的空间分布出发,分析了发射天线主瓣、旁瓣信号的反射特点,并在相位测距理论的基础上,利用信号矢量分析法,得到了泄漏信号引入的测量误差式,据此建立了泄漏信号对雷达测量影响的数学模型,揭示了非调制雷达有效作用距离与各影响因素的定量关系,并提出了解决泄漏影响的异频雷达方法,搭建了相应实验系统,实验表明该系统有效测距范围可达160 m,证明了泄漏影响分析的有效性。To reduce the effect of leakage on measurement result in non-modulated continuous microwave radar,based on the spatial distribution of microwave signals of radar transmitter,the reflection characteristics of the main lobe and side-lobe signals of the transmitter antenna are analyzed ; then,based on phase-ranging theory,the formula of the measurement error caused by leakage signal is obtained using signal vector analysis method,based on which the mathematical model of leakage signal affecting microwave radar measurement result is established; and the quantitative relationship between the effective range of non-modulated radar and various affecting factors is revealed.A method of transponder is proposed,which adopts different transmitting and receiving frequencies to solve the effect of leakage,and the related experiment system was built.The experiment results show that the effective working range of the system can reach up to 160 meters,which proves the effectiveness of the analysis on the effect of radar leakage.

关 键 词：非调制 微波雷达 泄漏影响 异频雷达 

分 类 号：TN958.94[电子电信—信号与信息处理] TH76[电子电信—信息与通信工程]