星载多波束天线在轨性能评估方法

为解决星载多波束天线测试波束数量大、在轨测试成本高、性能评估困难等问题，在合成多波束形成原理基础上，通过分析天线系统中波束成形网络和馈源阵之间的映射关系，提出了一种以馈源阵性能为基础评估天线性能的策略。采用最小二乘估计法，对馈源性能估计中典型波束的数量、组合方式选取与平均估计误差等问题进行了分析，并通过仿真实验得出了典型波束数量、组合方式、平均估计误差三者间的定量关系以及在实际条件下，测试波束数量的选取范围和波束最佳组合方式，为高效地处理在轨测试数据提供了一种低复杂度的分析方法，对实际系统中星载多波束天线在轨测试具有重要意义。

In orbit performance evaluation of multiple beam antenna on satellites

To solve such problems as the high in orbit testing cost and the difficult evaluation of Multiple Beam Antenna with large number of beams, an antenna evaluation strategy based on the feed properties was proposed, through the analysis of the beam forming principle of the composite beams and exploration of the relation between the beam forming network and the feed Source Array. By employing the least squares evaluation method, the typical beam selection, combination and average estimation error for the feed properties were analyzed. The simulation results show the quantitative correlation among the typical beam number, combination and the average estimation error, and the selection of the typical test beam number and the optimal test beams sequence in actual conditions. The proposed method can provide an excellent reference value to process the In Orbit testing data efficiency and reduce the complexity of finding the optimal test beams sequence for a practical system.