介質覆蓋體上過渡區(qū)和焦散區(qū)的場分析
ANALYSIS OF THE FIELD TRANSITION AND CAUSTIC REGIONS OF DIELECTRIC COATED OBJECTS
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摘要: 本文應用幾何繞射理論對介質覆蓋體上過渡區(qū)和焦散區(qū)的場進行了詳細地分析。在對過渡區(qū)的分析中,通過對留數級數解的修正,實現(xiàn)了場的直接計算。而對于由爬行波產生的焦散區(qū)則通過擴展等效電磁流的概念來加以分析。計算結果均與經典解進行了比較以證實本方法的有效性。
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關鍵詞:
- 介質覆蓋; 幾何繞射理論; 電磁散射
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.幾何繞射理論.西安:西北電訊工程學院出版社,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,孟侃譯.正弦電磁場,上海:上?？茖W技術出版社,1964,318. -
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