求解电大尺寸目标与地海面复合散射的SBR-IEM混合算法  

A SBR-IEM hybrid method for solution of electrically large size and composite electromagnetic scattering from soil/sea surface

作　　者：李雅萍[1] 齐萌[1] 李西敏[2] 苗海[3] 

机构地区：[1]洛阳理工学院计算机与信息工程学院,河南洛阳471023 [2]空军工程大学导弹学院,西安710000 [3]海军工程大学动力工程学院,武汉430033

出　　处：《海军工程大学学报》2016年第4期85-91,共7页Journal of Naval University of Engineering

基　　金：航空科学基金资助项目(20130196005)

摘　　要：提出了一种研究大范围地海面背景与电大尺寸目标复合电磁散射的新型混合算法。该算法首先将地海面划分为大尺寸粗糙面元,采用基于快速射线寻迹技术的改进射线追踪(SBR)方法计算目标面元和粗糙面元上产生的相干散射分量;然后,结合积分方程解(IEM)计算粗糙面元上产生的非相干散射分量;最后,通过实例计算,并与KA-MoM结果进行了对比分析,结果表明:改进SBR-IEM混合算法具有较高的计算效率,节省大量存储空间和运算时间。A hybrid algorithm for analyzing composite EM scattering from soil/sea surface and electri- cally large object is proposed. Firstly, the soil/sea surface is divided into rough facets in large size and the coherent scattering is calculated according to improved SBR. Then, the diffused incoherent scat- tering is calculated with IEM. Finally, the accuracy and efficiency of the hybrid method are validated in numerical examples by contrasting to the KA-Mom,which proves that the improved SBR_IEM al- gorithm has higher computation efficiency and can save a lot of storage and computation time.

关 键 词：复合电磁散射 粗糙面 射线追踪法 积分方程解 混合算法 

分 类 号：TM153[电气工程—电工理论与新技术]