卫星定位有源天线性能测试接口转换装置

Interface conversion device of satellite positioning active antenna performance test

在卫星有源接收天线测试过程中,受天线自身所带放大器增益的限制,其输出的信号功率无法达到后端测试设备最低输入灵敏度的要求,致使天线的某些性能测试工作无法进行。针对有源天线测试过程中遇到的接口不匹配和接收信号场强不匹配问题,提出了在被测有源天线与后端测试设备之间增加一个接口转换装置。该装置由SMA接头、低噪声放大器、直流电源隔离电路和防浪涌冲击电路构成。仿真表明,该接口转换装置能有效地完成在微波暗室里进行的卫星有源接收天线性能测试。

In the process of satellite positioning active antenna performance test,it is limited by antenna＇s amplifier gain,the output of the signal power can not reach minimum input sensitivity of the back-end test equipment,resulting in the antenna performance test can not be processed.For interface mismatching and received signal field strength mismatching in the test process,an interface conversion device is added to measured active antenna and back-end test equipment.The device consists of SMA interface,low-noise amplifier,DC power isolation circuit and anti-surge circuit.The interface conversion device that can effectively be done in a dark room to satellite microwave active antenna performance testing.