基于高频混合方法的海上目标电磁散射特性分析  

EM Backscattering of Simplified Ship Model over Sea Surface Based on a High Frequency Hybrid Method

作　　者：崔凯[1] 许小剑[1] 毛士艺[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100083

出　　处：《电子与信息学报》2008年第6期1500-1503,共4页Journal of Electronics & Information Technology

摘　　要：三面空腔反射器是一种特殊的反射结构,空腔内的多次散射是形成其雷达散射截面(RCS)的主要贡献之一。该文在计算机图形学裁剪的基础上,改进了现有的区域投影方法,结合物理光学法和阻抗边界条件,分析了正确处理目标几何结构的遮挡和消隐之后三面空腔反射器内的多次散射机理。最后,将阻抗边界条件扩展到海上环境,对两类带有反射器结构的海上舰船简化模型进行了RCS计算与分析。结果表明,海面与目标之间以及目标内部的多次散射作用在一定情况下可形成明显的散射特征。This paper focuses on a special kind of three-plate cavity reflectors which is useful in EM backscattering model of large complex targets over land or sea surface. After employing Computer Graphics （CG） method to eliminate shadowing effect, Physical Optics （PO） and Area Projection （AP） method are combined to analyze specular reflection and multiple scattering mechanism to calculate the Radar Cross Section （RCS） of different reflectors. Finally, by combining with sea reflection coefficient under different sea states, a procdure is proposed to compute the RCS of simplified ship targets over sea surface. The results show that multiple scattering can form obvious RCS characterization under certain conditions.

关 键 词：雷达散射截面 三面空腔反射器 多次散射 区域投影法 

分 类 号：TN011[电子电信—物理电子学]