反射面天线机电耦合分析及实验验证

针对反射面天线分析设计中存在的机电分离问题，使用结构分析软件得到天线面板的 结构变形，将变形转化为相位差引入天线远区电场公式中。通过推导的网格转换矩阵，在结 构网格的基础上完成天线远区电场的计算。同时根据半功率波瓣宽度预估方向图的离散精度 。利用某3.7米卡氏通信天线进行了验证实验，试验结果表明本文方法是正确有效的。与软 件集成的分析方法相比，该方法不但电磁分析精度较高，而且分析时间更短。

The Electromechanical Coupling Analysis of Reflector Antennas and Its Experimental Verification

In the electromechanical coupling analysis of reflector antennas, structural deformation is obtained by structure analysis software, deformation was introduced in the formula of antenna's far field patterns by phase difference. Based on structure mesh, far field patterns of antenna is calculated through the mesh transformation matrix and the beam breadth of half power is used to estimate the calculation range and the discrete precision of far field patterns. A verification experiment has been designed for verifying the new method via a 3.7m Cassegrain antenna in Ku band. Results of experiment indicate that: the method in this paper is valid. Compared with integrated software method, the electromagnetic analysis precision improved computing time reduced.