【作者】 武剑； 任新成； 朱小敏；

【Author】 WU jian;REN xincheng;ZHU xiaomin;School of Physics and Electronic Information, Yan‘an University;

【机构】 延安大学物理与电子信息学院；

【摘要】 利用一维带限Weierstrass分形函数模拟实际粗糙地面,运用时域有限差分方法研究超宽带高斯脉冲电磁波入射时分形粗糙地面的宽带电磁散射问题;通过数值计算得到了后向散射系数随频率的变化曲线;分析了粗糙地面高度起伏均方根、分维数、土壤湿度和入射角的变化对后向散射系数的影响,得到了一维分形粗糙地面的宽带后向电磁散射特性。更多还原

【Abstract】 1D band-limited Weierstrass fractal function is used to simulate the natural rough land surface, the broadband electromagnetic scattering from fractal rough land surface under UWB Gaussian pulse electromagnetic wave irradiation is studied using FDTD, and the curves of back electromagnetic scattering coefficient varied with frequency are obtained by numerical calculation. The influences of the variation of the root-mean-square of rough land height fluctuation, fractal dimension,the moisture capacity of soil, the angle of incidence wave on the back scattering coefficient is analyzed. The characteristics of the broadband back electromagnetic scattering from 1D fractal rough land surface are obtained.更多还原