基于表面电流的粗糙面上方圆柱距离像仿真  

Range profile analysis of target above rough surface based on surface current model

作　　者：何思远[1] 张凡[1] 李超[1] 胡卫东[2] 郁文贤[3] 朱国强[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430079 [2]国防科技大学自动目标识别重点实验室,湖南长沙410073 [3]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《电波科学学报》2011年第3期431-436,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助(No.61001059);中国博士后科学基金资助;中央高校基本科研业务费专项资金资助

摘　　要：在矩量法和物理光学混合算法的框架内,引入矩阵压缩技术提高计算效率,降低计算机内存需求,实现粗糙面上方二维导电圆柱宽带复合电磁散射建模。通过求解复合模型表面电流在频域仿真回波信号,结合傅里叶逆变换(IDFT)获取粗糙面环境下圆柱的高分辨一维距离像(HRRP),实现了粗糙面上方目标HRRP特性仿真与分析。采用定量与定性的综合分析手段,结合表面电流分解与射线路径相位预估,揭示了目标与粗糙面之间复杂电磁耦合机理与作用过程,明确了HRRP各峰值形成的来源,定量研究了各阶耦合相互作用回波对雷达成像的贡献。Combined the method of moment and the physical optics method with the matrix decomposition technique, a hybrid method is applied in this paper for the so- lution of the composite scattering from the two-dimension perfect electric conductor column target above a rough surface. By calculating the radiation of the surface cur- rents and simulating the radar echoes in the frequency domain, the high resolution range profiles（HRRP） of the column above a rough surface are obtained by per- forming the inverse discrete Fourier transform on the wideband backscattered field. Combining the surface current decomposition and the ray theory prediction tech- niques, the connection between the simulated range profiles and the complex scat- tering mechanisms are established. The cause of the HRRP is identified and the dif- ferent order coupling interactions give rise to different order range profiles

关 键 词：距离像 目标与粗糙面 耦合相互作用 电磁建模 

分 类 号：TM15[电气工程—电工理论与新技术]