介质覆盖体上过渡区和焦散区的场分析

ANALYSIS OF THE FIELD TRANSITION AND CAUSTIC REGIONS OF DIELECTRIC COATED OBJECTS

本文应用几何绕射理论对介质覆盖体上过渡区和焦散区的场进行了详细地分析。在对过渡区的分析中,通过对留数级数解的修正,实现了场的直接计算。而对于由爬行波产生的焦散区则通过扩展等效电磁流的概念来加以分析。计算结果均与经典解进行了比较以证实本方法的有效性。

The fields in transition and caustic region of dielectric coated objects are obtained by geometric theory of diffraction. In transition region, direct computation is accomplished by modifying the residue series solution. The equivalent currents are extended to deal with the creeping wave in caustic region. The comparison of computation resuts with the eigenfunction solution shows that the presented methods are efficient.