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

作　　者：丁锐[1] 金亚秋[1] 

机构地区：[1]复旦大学波散射与遥感信息教育部重点实验室,上海200433

出　　处：《物理学报》2011年第12期188-197,共10页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60971091;40637033);复旦大学研究生创新基金资助的课题~~

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.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.

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 

分 类 号：TN011[电子电信—物理电子学]