对地观察卫星赋形反射面数传天线设计

根据几何光学原理对近地轨道卫星地球匹配波束赋形反射面进行了设计 ,在此基础上利用物理光学近似估算该反射面的二次辐射方向图和增益 ,并以地球匹配波束为目标函数对赋形反射面进行了优化。在进行反射面赋形设计时提出了两种端值条件 ,并对其进行了数值仿真和比较。同时对如何减少第一端值条件下馈源影响进行了有益的研究。

Shaped-Beam Reflector Design for Data Transmission of Earth Resource Satellite

The shaped reflector for a low-orbital earth resource satellite is synthesized using geometrical optics in this paper. The secondary radiation patterns of the reflector are calculated based on physical optics technique, and the reflectors is optimized for obtaining the earth-matched beam. Two different boundary conditions are offered in synthesis of the reflector, and the corresponding calculated results are given and compared with each other. The effect of the blockage of feed on the secondary radiation pattern is studied. The calculated results agree well with the tested results.