高斯粗糙面与临空目标复合电磁散射的KH-MoM解  

KH-MoM solution of composite EM scattering from object at low altitude over Gaussian random surfaces

作　　者：李西敏[1] 童创明[1,2] 付树洪[1] 李晶晶[1] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800 [2]毫米波国家重点实验室,江苏南京210096

出　　处：《电波科学学报》2010年第6期1146-1151,共6页Chinese Journal of Radio Science

基　　金：毫米波国家重点实验室基金项目资助(K200818)

摘　　要：提出了一种求解一维粗糙面与二维无限长临空目标复合电磁散射特性的新型混合算法。混合算法只需在粗糙面上进行一次积分运算,即可用基尔霍夫-亥姆霍兹方程(KH)描述电磁波经粗糙面后的散射情况,再用矩量法(MoM)分析目标的散射问题,通过KH与MoM的混合来体现粗糙面与目标之间的耦合作用。经与不同方法的对比,验证了混合方法的正确性,体现了混合方法较数值法在求解效率上的巨大优势。计算了粗糙面与临空目标的统计复合散射特性,分析了粗糙面的起伏参数、临空目标的形状以及粗糙面介质的电参数对复合散射特性的影响。A novel hybrid method for solving composite electromagnetic（EM）scattering problem of 1-D random surface and the 2-D object at low altitude is proposed.Kirchhoff-Helmholtz（KH）equations are adopted to describe the wave scattering on the rough surface,and only one integral operation is needed.Then method of moment（MoM）is used to calculate the induced current on the object,and the coupling of random surface and object is considered by introducing KH equations into MoM.Compared with different methods,the accuracy of the hybrid method is validated and its efficiency is proved to be much higher.By calculating the statistic composite EM characteristics of random surface and object,the influence of rough surface parameters,profile of the object and permittivity of media on the composite EM characteristics are investigated finally.

关 键 词：复合电磁散射 基尔霍夫-亥姆霍兹方程 矩量法 粗糙面与临空目标 

分 类 号：TN011[电子电信—物理电子学] O411.3[理学—理论物理]