理想導(dǎo)電凸曲面上振子電磁輻射UTD解的并矢格林函數(shù)方法
A UTD SOLUTION FOR RADIATION FROM THE SOURCE ON A CONVEX SURFACE BY DGF METHOD
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摘要: P.H.Pathak,Wang Nan等人在研究典型問題幾何繞射理論之后,于1981年發(fā)表了任意導(dǎo)電凸曲面振子天線高頻電磁輻射一致性幾何繞射理論近似解。本文應(yīng)用并矢格林函數(shù)方法,通過典型曲面高頻電磁輻射一致性近似解的研究和推廣,導(dǎo)出了理想導(dǎo)電凸曲面上電、磁振子電磁輻射場在高頻近似下一致性幾何繞射理論近似解。與P.H.Pathak,Wang Nan等人的結(jié)果相比,主項并矢轉(zhuǎn)移函數(shù)除個別系數(shù)外完全相同,高階并矢轉(zhuǎn)移函數(shù)在幾何光學(xué)區(qū)略有差異。Abstract: A UTD (uniform geometrical theory of diffraction for electromagnetic waves) solution for the field excited by electric and (or) magnetic dipoles on a perfectly conducting cylinder is derived by DGF (dyadic Green s function) technique at first. Then, with the fundamental principle of high-frequency electromagnetic field, the character of geometrical optics and the differential geometry theory, a UTD solution for the radiation field of dipole on a perfectly conducting smooth convex surface is obtained by directly extending the results of the canonical problem. The formulae given in this paper agree primarily with that obtained by P. H. Pathak et al. (1981) except for some factors of dyadic transfer function in lit region. Some factors derived by P. H. Pathak are corrected.
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G. L. James.[J].Geometrical theory of diffraction for electromagnetic wave, London New York, IEE.1980,:-[2]P. H. Pathak, Wang Nan, W. D. Burnside, R.C.Kouyoumjion, IEEE Trans. on AP, AP-29(1981)4, 609-622.[3]柯亨玉,黃錫文,李永俊,武漢大學(xué)學(xué)報(自然科學(xué)版),1990年,第3期,第57-67頁.[4]柯亨玉,黃錫文,武漢大學(xué)學(xué)報(目然科學(xué)版),1991年,第2期,第41-51頁.[5]吳大任,微分幾何講義,人民教育出版社,北京,1981年. -
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