SMALL-SLOPE APPROXIMATION METHOD: A FURTHER STUDY OF VECTOR WAVE SCATTERING FROM TWO-DIMENSIONAL SURFACES AND COMPARISON WITH EXPERIMENTAL DATA
SMALL-SLOPE APPROXIMATION METHOD: A FURTHER STUDY OF VECTOR WAVE SCATTERING FROM TWO-DIMENSIONAL SURFACES AND COMPARISON WITH EXPERIMENTAL DATA
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DOI：
10.2528/pier02070603
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发表时间：
2002
影响因子：
6.7
通讯作者：
G. Berginc
中科院分区：
文献类型：
--
作者：
G. Berginc
本文研究了二维金属和介质随机粗糙表面极化电磁平面波散射截面的计算。利用局部小斜率近似法计算了目标的散射截面，并与实验数据进行了比较。为了在较大的斜率范围内得到准确的结果，本文对SSA方法的二阶项进行了数值实现。本文考虑了任意方向上的散射波矢量和入射波矢量，以及具有互补性的金属材料和介电材料。表面高度用高斯概率密度函数和高斯或非高斯相关函数来考虑。在双基地情况下，计算了交叉极化和共极化的电磁强度的相干和非相干分量，并将理论与实测数据进行了比较。
This paper deals with the calculation of the scattering cross-section of polarized electromagnetic plane waves from 2-D metallic and dielectric randomly rough surfaces. The scattering cross- section of object is calculated by the Local Small Slope Approximation (SSA), the scattering cross-section is then compared with experimental data. In this paper, second order terms of the SSA method have been numerically implemented in order to obtain accurate results for a large range of slope. In this paper, we consider scattered and incident wave vectors in arbitrary directions, metallic and dielectric materials with complexpermittivity. Surfaces are considered with Gaussian probability density functions for surface heights and Gaussian or non-Gaussian correlation functions. The coherent and incoherent components of the electromagnetic intensity for cross- and co-polarization are calculated in the bistatic case and we give several comparisons of the theory with measured data.