为了实现对天线-罩系统快速高精度的仿真计算,针对瞄准误差常规算法中反复迭代、小步长搜索与复杂窗函数变换等不足,文中引入远场有效观察角的概念,仅考虑极值点附近部分主瓣。并将远场方向图与瞄准误差计算在程序上分离,使用最小二乘法对远场方向图数据进行曲线拟合,通过拟合函数最值直接求解瞄准误差。仿真结果证明,该算法降低了对单个计算点精度的依赖。且在不降低精度的前提下大大提高计算效率。

In order to achieve high speed and effective simulation of antenna-radome system, according to the shortages such as step-itera-tions, small-step searching and complex window function transformation in conventional algorithms, in this article, the concept of far-field effective viewing angle was introduced, only small extent viewing angle near extreme point had been considered. The solving of far-field pattern and BSE was separated, far-field pattern was fitted by least square method curve fitting method, and the BSE can be solved by fit-ting function directly. The simulation result demonstrates that the independence on single point's precision is reduced; the new arithmetic's efficiency is highly improved without reducing the accuracy.