摘要
采用一维带限分形函数模拟实际的粗糙地面,应用时域有限差分法研究了一维分形地面与半埋矩形截面目标复合电磁散射特性,得出了复合散射系数随散射角变化的曲线,分析了分形地面粗糙度参数、土壤介电参数、目标几何参数等对复合散射系数的影响,得到了分形地面与半埋目标复合电磁散射的特性。数值计算结果表明复合散射系数受地面粗糙度参数影响明显,目标表面散射波对表面镜反射方向复合散射系数影响较大。
The composite electromagnetic scattering from target of rectangular cross-section partially buried in fractal rough land surface is studied using FDTD,where the actual rough land surface is simulated with model of 1D band-limited fractal function.The curve of scattering angle distribution of composite scattering coefficient is obtained.The influence of the roughness parameters of fractal rough land surface,the dielectric parameters of soil,the geometric parameter of the target on the composite scattering coefficient is analyzed in details,obtaining the characteristics of the composite scattering from object partially buried in fractal rough land surface.The numerical results show that the influence of roughness parameters of rough land surface on composite scattering coefficient is obvious,and the influence of scattering wave of target surface on composite scattering coefficient in specular direction of target surface is remarkable.
出处
《电子测量技术》
2014年第9期23-27,共5页
Electronic Measurement Technology
基金
国家自然科学基金(61379026)
延安市科技计划(2012kg-10)资助项目
关键词
复合电磁散射
分形地面
半埋目标
FDTD
composite electromagnetic scattering
fractal rough land surface
partially buried target
FDTD
