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随机Gauss粗糙面上三维导体目标散射差场的随机泛函解析计算方法
A stochastic functional approach to difference scattering from a three-dimensional perfect electric conductor target on randomly rough surface
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摘要: 提出一种解析的随机泛函方法（SFA）,计算导体Gauss粗糙面上三维导体目标的复合电磁散射.推导粗糙面的随机Green函数,用一种新的四路径模型描述面体复合散射机理,用SFA求解双站差场雷达散射截面.以导体球目标为算例,与其他数值计算方法比较后验证了SFA的有效性与准确性,同时讨论了粗糙度、体目标尺寸以及距离粗糙面高度等参量变化对结果的影响,给出复杂形状体目标的双站差场雷达散射截面的空间角分布.
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关键词:
- 随机泛函方法 /
- 粗糙面随机Green函数 /
- 差场雷达散射截面 /
- 面体复合散射
Abstract: A stochastic functional approach （SFA） is developed to calculate electromagnetic composite scattering from a three-dimensional perfectly electric conducting （PEC） target on a randomly rough PEC surface.The stochastic Green＇s function for randomly rough surface is derived,and a novel four-path model is presented to describe the scattering mechanism of target-surface interactions.The SFA is used to obtain the difference scattering cross section due to the rough surface of target.As a simple example of a spherical target with rough surface,the SFA is numerically compared with other numerical approaches,showing its accuracy and effectiveness.Finally,the difference bistatic scattering from a complex electric large target with rough surface and its functional dependence on the parameters are discussed. -
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