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
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摘要: 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。
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关键词:
- 介质覆盖; 几何绕射理论; 电磁散射
Abstract: 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. -
Rao T C K, Hamid M A K. IEE Proc: H, 1980, 127(3):143-153.[2]Kim H T, Wang N. IEEE Trans. on AP, 1989, AP-37(11):1963-1472.[3]汪茂光.几何绕射理论.西安:西北电讯工程学院出版社,1985.[4]Ryan C E, Petera L. IEEE Trans. on AP, 1969, AP-17(3): 297-299.[5][5][6]R. F.哈林登著,孟侃译.正弦电磁场,上海:上海科学技术出版社,1964,318. -
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