不同吸波涂层对三维复杂目标的RCS影响的分析  

Analysis of Impacts of Various RAM on RCS of 3-D Complex Targets

作　　者：王湃[1] 周乐柱[1] 谭云华[2] 董硕[1] 

机构地区：[1]北京大学信息科学技术学院电子学系,北京100871 [2]香港城市大学电子工程系

出　　处：《微波学报》2005年第2期33-37,共5页Journal of Microwaves

基　　金：国家自然科学基金(6007016);教育部博士点基金(20010001037)项目资助

摘　　要：利用有限元-快速多极子算法(FEM-FMM)分析了三维复杂目标涂有不同吸波涂层的雷达散射截面(RCS)。以圆锥体为例,详细计算分析了涂敷有耗各向同性、正单轴各向异性、负单轴各向异性和纳米吸波材料4种典型吸波材料对目标电磁散射特性的影响,并首次讨论了每种吸波材料随不同涂层厚度对RCS的影响,得到了最佳隐身效果的吸波材料和涂层厚度的组合。结果表明,涂敷最佳吸波材料目标的后向RCS比目标没有吸波涂层时可以降低16. 6dB。The hybrid vector finite element method and fast multipole method(FEM-FMM) was used to calculate RCS of 3-D complex targets coated with various radar absorbing materials(RAM). For a cone as an example, this paper analyzed the impact of four kinds of canonical RAM including lossy isotropic, positive uniaxial anisotropic, negative uniaxial anisotropic and nanometer absorbing materials on electromagnetic scattering characteristics of the objects. For the first time , the effect of RCS caused by different coating RAM thickness was discussed and optimal RAM with its corresponding coating thickness were obtained to attain best stealth purpose. Numerical results showed that the back RCS can be reduced about 16.6dB compared with the uncoated objects by using optical coating RAM.

关 键 词：吸波涂层 复杂目标 雷达散射截面(RCS) 三维 单轴各向异性 快速多极子算法 电磁散射特性 纳米吸波材料 涂层厚度 各向同性 计算分析 隐身效果 有限元 圆锥体 涂敷 最佳 

分 类 号：TN97[电子电信—信号与信息处理]