EM Wave Scattering by Random Surfaces With Different Contrast and Large Roughness Heights

IF 1.8 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2022-09-07 DOI:10.1109/JMMCT.2022.3204722

Mohsen Eslami Nazari;Weimin Huang

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引用次数: 1

Abstract

A solution for electromagnetic (EM) scattering over a two-dimensional random rough surface (three-dimensional scattering problem) with large roughness height using the generalized functions approach is proposed in this paper. The EM field derivation incorporates rough surface profile with small-slope, a radiation source and involves all scattering orders of the scattered electric field (E-field) for high and moderate contrast media. Subsequently, the first-order scattered E-field is calculated using the Neumann series solution for transverse magnetic (TM) polarization. By considering pulsed dipole antenna and a two-dimensional Gaussian rough surface distribution with different root mean square heights and correlation lengths, the scattered E-field along with the radar cross-section is calculated. Using the result of the method of moments (MoM) as reference, a numerical evaluation of the solution for different roughness heights and contrast media demonstrates that the proposed solution is better than those of the small perturbation method (SPM), Kirchhoff approximation (KA) and small-slope approximation (SSA).

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不同对比度和大粗糙度高度随机表面的电磁波散射

本文提出了一种利用广义函数方法求解大粗糙度二维随机粗糙表面上的电磁散射（三维散射问题）的方法。EM场推导结合了具有小斜率的粗糙表面轮廓、辐射源，并涉及高对比度和中等对比度介质的散射电场（E场）的所有散射阶数。随后，使用横向磁（TM）极化的Neumann级数解计算一阶散射E场。通过考虑脉冲偶极子天线和具有不同均方根高度和相关长度的二维高斯粗糙表面分布，计算了散射电场沿雷达截面的分布。以矩量法（MoM）的结果为参考，对不同粗糙度高度和对比度介质的解进行了数值评估，结果表明，该解优于小扰动法（SPM）、基尔霍夫近似法（KA）和小斜率近似法（SSA）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Journal on Multiscale and Multiphysics Computational Techniques Mathematics-Mathematical Physics

CiteScore

4.30

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0.00%

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