介質(zhì)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(yīng)用幾何繞射理論對介質(zhì)覆蓋體上過渡區(qū)和焦散區(qū)的場進(jìn)行了詳細(xì)地分析。在對過渡區(qū)的分析中,通過對留數(shù)級數(shù)解的修正,實(shí)現(xiàn)了場的直接計(jì)算。而對于由爬行波產(chǎn)生的焦散區(qū)則通過擴(kuò)展等效電磁流的概念來加以分析。計(jì)算結(jié)果均與經(jīng)典解進(jìn)行了比較以證實(shí)本方法的有效性。
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關(guān)鍵詞:
- 介質(zhì)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(xué)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(xué)技術(shù)出版社,1964,318. -
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