三类新型随机粗糙面模型的快速散射特性分析  

Analysis on fast electromagnetic scattering characteristics for three novel randomly rough surface models

作　　者：李昌泽[1] 童创明[1] 齐立辉[2] 武光辉[1] 王安 

机构地区：[1]空军工程大学防空反导学院,西安710051 [2]中国人民解放军786厂军代室,西安710051 [3]中国电子系统工程公司,北京100058

出　　处：《电波科学学报》2015年第6期1093-1101,共9页Chinese Journal of Radio Science

基　　金：国家自然科学基金(No.61372033)

摘　　要：基于表面粗糙度对雷达目标电磁散射特性的影响,为真实地模拟实际自然场境,提出了三类粗糙环境中表面粗糙度不同的新型分区域复合随机粗糙面模型.采用在同一粗糙面上使用不同均方根高度和相关长度的方法进行建模,替代了传统的单一谱函数模型.应用稀疏矩阵平面迭代/规范网格法快速计算了此三类新型随机粗糙面模型的电磁散射特性,重点分析了不同表面粗糙度模型对于环境电磁散射特性的影响,为研究、分析和探测符合实际自然环境的地形、地貌提供了理论依据.Based on the effect of surface roughness on the electromagnetic scattering properties of the radar target, three kinds of novel sub-regionally composite randomly rough surface models with different surface roughnesses are presented to simulate the realistic environment. Instead of the traditional single spectral function model, the rough surface is modeled with different root mean square (RMS) heights and correlation lengths parameters. Finally, the sparse-matrix flat-surface iterative approach (SMFSIA) canonical grid (CAG) method is proposed to analyze the electromagnetic scattering characteristics of the three kinds of surface cases, especially for the influence of different surface roughnesses. Therefore, it provides a theoretical basis for the research, analyzes detection of terrain and landform accords with the actual natural environment. Copyright © 2015 by Editorial Department of Chinese Journal of Radio Science

关 键 词：随机粗糙面模型 稀疏矩阵平面迭代法 规范网格法 电磁散射 

分 类 号：TN011[电子电信—物理电子学]