星载可展开天线波束指向测试方法研究

Research of the Satellite Antenna Alignment Testing

综合天线方向图测量和光学测量方法研究了天线远场测量和近场测量光学测试系统,进而利用光学仪器测试了星载天线波束指向的两种测试方法.望远镜结合天线远场测试系统能较准确地测试出天线波束指向.同时,提出了采用准直仪及波罗棱镜在天线平面近场测试系统测试波束指向的方法.海洋二号卫星载荷校正辐射计观测天线波束指向的测试表明,该方法是有效和准确的,其可以推广至一般高增益天线测试.

The synthesis of the antenna pattern measurement and optics measurement is outlined to test the antenna beam alignment. This paper will discuss the application of alignment techniques and tools in the far-field and near-field test facility. Boresight of the antenna was measured by the standard alignment telescope together with the far field pattern test, while the new method to measure the antenna＇s beam alignment based on the planar near field method was also proposed. This method used the auto collimator and porroprism with the antenna near-field planar scan test system. The boresight of Haiyang-2 satellite calibration radiometer antenna measurement results verified the validity and accuracy of this method. Both of these two methods can also be applied to the common high gain antenna measurement.