分形粗糙面与上方导体目标的宽带后向电磁散射研究  

Study on Wideband Back Electromagnetic Scattering from Fractal Rough Surface and Conductor Target above It

作　　者：石延梅[1] 武剑[1] 朱小敏[1] 

机构地区：[1]延安大学物理与电子信息学院,陕西延安716000

出　　处：《河南科学》2016年第3期338-342,共5页Henan Science

基　　金：国家自然科学基金项目(61379026);陕西省科学技术研究发展计划项目(工业攻关)(2014K05-61);陕西省教育厅科研计划项目(14JK1830)

摘　　要：采用一维带限Weierstrass分形函数模拟实际粗糙地面,运用时域有限差分法研究了高斯脉冲波入射时粗糙地面与上方二维等边三角形导体目标的宽带后向电磁散射问题,得到了后向复合散射系数随频率的变化曲线.分析了后向复合散射系数随粗糙地面高度起伏均方根、分维数、土壤湿度和三角形边长、倾角、高度的变化情况,得到了分形粗糙地面与上方导体目标复合的宽带后向电磁散射特性.In this paper,1D band-limited Weierstrass fractal function is used to simulate the natural rough landsurface. The wideband back electromagnetic scattering from rough land surface and conductor with two-dimensionalequilateral triangle above it under pulse wave incidence is studied by using FDTD,and the curves of back electromagneticscattering coefficients varied with frequency are obtained. The back composite scattering coefficient varyings withthe root-mean-square of fractal rough land surface,fractal dimensions and the moisture capacity of soil,the sidelength,tilt angle and height of triangle are analyzed. The characteristics of the wideband back electromagnetic scatteringfrom fractal rough land surface and conductor target above it are obtained.

关 键 词：宽带电磁散射 分形粗糙地面 后向复合散射系数 三角形目标 FDTD 

分 类 号：TN011.5[电子电信—物理电子学]