1.引言 在电磁散射计算问题中,过去研究较多的是高频情况,所用方法通常是几何绕射法、光学法等。用矩量法计基电磁散射问题,60年代提出了网格法。这种方法多用于尺寸较小的物体,如线天线、小平板等。l984年美国人用矩量法计算了飞机、导弹等的雷达截 1. Introduction In the electromagnetic scattering calculation, the past research is more about the high frequency, the method used is usually geometric diffraction method, optical method and so on. Using the moment method to calculate the basis of electromagnetic scattering, the grid method was proposed in the 1960s. This method is mostly used for smaller objects, such as wire antenna, tablet and so on. In l984, the U.S. nationals used radar to capture radar and missile radar