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首页> 外文期刊>Applied Computational Electromagnetics Society journal >FDTD Investigation on Electromagnetic Scattering from Two-Dimensional Layered Rough Surfaces
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FDTD Investigation on Electromagnetic Scattering from Two-Dimensional Layered Rough Surfaces

机译：二维分层粗糙表面电磁散射的FDTD研究

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摘要

This paper presents an investigation into the electromagnetic scattering characteristic of two-dimensional (2-D) layered rough surfaces by using a finite-difference time-domain (FDTD) algorithm, which constitutes a three-dimensional scattering problem. The uniaxial perfectly matched layer medium is adopted for truncation of FDTD lattices, in which the finite-difference equations can be used for the total computation domain by properly choosing the uniaxial parameters. The upper and down rough surfaces are characterized with Gaussian statistics for the height and the autocorrelation function. The angular distribution of bistatic scattering coefficent from a 2-D single-layered rough surface is calculated, and it shows good agreement with the numerical result through the Kirchhoff Approximation except for with large scattering angles. Finally, the bistatic scattering coefficents versus scattered and azimuthal angle for different conditions are analyzed in detail.
机译：本文利用有限时域（FDTD）算法研究了二维（2-D）层状粗糙表面的电磁散射特性，该问题构成了三维散射问题。采用单轴完美匹配层介质截断FDTD晶格，通过适当选择单轴参数，可以将有限差分方程用于总计算域。上下粗糙表面的高度和自相关函数用高斯统计来表征。计算了二维单层粗糙表面的双基地散射系数的角分布，除具有较大的散射角外，它与通过基尔霍夫近似得到的数值结果吻合良好。最后，详细分析了不同条件下双基地散射系数与散射角和方位角的关系。

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