理想導(dǎo)體半圓柱TE波散射的混合法解
A HYBRID METHOD FOR TE SCATTERING BY A PERFECTLY CONDUCTING SEMICYLINDER
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摘要: 本文應(yīng)用混合技術(shù)分析了在TE平面波激勵下,理想導(dǎo)體半圓柱的雙站散射。該混合技術(shù)是把半圓柱劈附近的電流表示為未知數(shù),圓柱曲面上的一階電流應(yīng)用Fock理論求解,高階繞射電流表示為含有未知系數(shù)的Fock型函數(shù)。圓柱平面上的一階電流用物理光學(xué)近似和曲劈的一致性幾何繞射理論得到。劈的二階繞射電流表示為含有未知系數(shù)的GTD形式。然后通過磁場積分方程,運用簡單矩量法求得劈附近的電流和未知的繞射系數(shù)。最后計算了理想導(dǎo)體半圓柱的雙站散射截面,結(jié)果與矩量法的結(jié)果吻合得相當好。
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關(guān)鍵詞:
- 電磁散射; 混合法; 半圓柱
Abstract: Bistatic scattering of a perfectly conducting semicylinder is analysed by using a hybrid method. In the hybrid method, the currents in the close vicinity of edges are represented as unknown coefficients; the first-order currents on the curved face are obtained by Fock theory; the high-order currents are described as the Fock type functions involving two unknown coefficients. The first-order currents on planar surface are physical optical currents and diffraction currents obtained by the uniform geometrical theory of diffraction form involving two unknown coefficients. The magnetic field equation is solved to obtained four coefficients and the currents in the close vicinity of the edges. The results obtained by the hybrid method are in good agreement with the results of moment method. -
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