合成孔径雷达(SAR)是一种高分辨率的成像雷达,为了保证良好的电性能,需控制其在轨展开后的全阵面平面度。文中以某星载 SAR 天线系统为研究平台,分析了影响其在轨展开后全阵面平面度的各个环节。通过对比各平面度分配的方法,最终选用方和根法来对该平面度各组成环进行指标分配,并采取一定的措施对各组成环进行严格的指标控制,通过仿真计算及实际测量进行指标比对,验证了分配方法及控制策略的可靠性。

Synthetic aperture radar (SAR) is a kind of imaging radars with high resolution. The flatness of the antenna array in the expansion state must be controlled in order to guarantee the good electrical performance of the SAR system. A satellite-borne SAR system is used as the research target. Every composition loop which effects the flatness of the antenna array in the expansion state is analyzed. The flatness index of every composition loop of the antenna array is allocated by square sum root method after comparing different flatness allocation methods. Some certain measures are taken to ensure the flatness index of every composition loop of the antenna array. Flatness allocation method and control strategy are proved to be reliable by index comparison between simulation calculation and real measurement.

TN821+. 8