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2018-10-15
Three Dimensional Electromagnetic Scattering of Two-Layer Rough Surfaces Using Physical Optics Approximation Algorithm
By
Progress In Electromagnetics Research M, Vol. 74, 159-168, 2018
Abstract
In this study, the physical optics approximation (POA) algorithm is described for predicting the electromagnetic (EM) scattering of three dimensional (3D) two-layer rough surfaces. The POA is initially used to calculate the composite scattering of an object and single layer rough surface for two dimensional (2D) situations. We extend this method to the case of a rough layer with two rough interfaces. The multiple coupling interactions between the upper and lower layer are considered based on an iterative strategy. Because the coupling effect is considered, the 3D model is quite time-consuming. In order to obtain numerical results rapidly, a parallel technique based on the OpenMP is adopted to accelerate the coupling iterative calculation. The model is applicable for moderate to large surface roughness. However, the rough surface should have small to moderate slopes so as to meet the conditions of POA. In numerical results, the normalized radar cross section of two-layer rough surfaces model under different polarizations is calculated, and the model is validated by comparison with a numerical reference method based on the method of moment. In addition, the influence of roughness on the scattering model is analyzed and discussed.
Citation
Ke Li Li-Xin Guo Juan Li , "Three Dimensional Electromagnetic Scattering of Two-Layer Rough Surfaces Using Physical Optics Approximation Algorithm," Progress In Electromagnetics Research M, Vol. 74, 159-168, 2018.
doi:10.2528/PIERM18081304
http://www.jpier.org/PIERM/pier.php?paper=18081304
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