复杂陆地粗糙面及其上方坦克目标复合散射研究  

Composite electromagnetic scattering from tank target above complicated ground rough surface

作　　者：邹高翔 童创明[1,2] 高飞[3] 孙华龙[1] 彭鹏[1,4] 王童[1] 

机构地区：[1]空军工程大学防空反导学院 [2]东南大学毫米波国家重点实验室 [3]中国人民解放军93942部队 [4]西安电子科技大学物理与光电工程学院

出　　处：《电波科学学报》2017年第3期261-272,共12页Chinese Journal of Radio Science

基　　金：国家自然科学基金(No.61372033)

摘　　要：研究了复杂陆地粗糙面及其上方坦克目标的复合散射特性.基于Monte Carlo方法,利用高斯谱函数模拟不同统计特性的陆地表面,运用加权反正切函数滤波处理以构造边界和连接相邻区域,构建了复杂陆地分区域复合粗糙面的几何模型.提出了一种快速精确求解复杂陆地粗糙面及其上方坦克目标复合散射的混合方法,利用迭代物理光学法求解目标与环境间的多次耦合,运用等效电磁流法修正棱边绕射.分析了复杂陆地粗糙面的散射特性,研究了入射角、均方根高度、相关长度和粗糙面表面结构对复合散射特性的影响.本研究为探测复杂环境上方的坦克目标提供了理论基础,数值仿真结果对雷达目标的探测与识别具有借鉴意义.The composite electromagnetic scattering characteristics of tank target above complicated ground rough surface are studied. Based on the Monte Carlo method, the Gauss spectral function is used to simulate different ground surfaces with different statistic properties. Weighted inverse tangent function is presented to filter in order to structure the boundary and connect adjacent regions. The geometrical model of composite rough surface of complicated ground environment is established. Aiming at fast and accurately computing composite scattering from tank target above complicated ground rough surface, a kind of new hybrid method is proposed, in which iterative physical optics （IPO） is used to calculate the multiple cou- pling of facets between target and environment and method of equivalent currents （MEC） is applied to mel- iorate edge diffr face is analyzed. action. The curve of bi-static scattering coefficient （BSC） of complicated ground rough sur The influences of incident angle, root mean square （RMS）, correlation length and construction on composite electromagnetic scattering characteristics are discussed. This research provides theoretical basis for detection of tank target above complicated ground rough surface. Numerical results can be used for reference in the filed of radar object detection and identification.

关 键 词：复杂陆地粗糙面 分区域复合粗糙面 坦克目标 迭代物理光学法 等效电磁流法 

分 类 号：TN011[电子电信—物理电子学]