一维带限分形Weierstrass地面的宽带电磁散射特性研究  

Investigation on Broadband Electromagnetic Scattering from One- dimensional Band- limited Fractal Weierstrass Ground

作　　者：陈芬芬[1] 田炜[1] 葛菁菁[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：《延安大学学报（自然科学版）》2015年第4期44-47,共4页Journal of Yan'an University：Natural Science Edition

基　　金：2013年国家级大学生创新创业训练计划项目(201310719020)

摘　　要：应用微扰法理论并结合一维带限分形Weierstrass功率谱密度推导出了宽带散射系数的计算公式,然后运用微扰法实现了地面宽带电磁散射问题的计算,得到了散射系数随入射波波长的变化曲线。分析了高度起伏均方根、分维数、土壤湿度、温度对散射系数的影响结果。结果表明,高度起伏均方根、分维数、土壤湿度对散射系数的影响明显,而温度对散射系数几乎无影响。Firstly small perturbation method is applicated. The broadband scattering coefficient calculation formula is derived combined with 1D band- limited Weierstrass fractal power spectral density. Then the calculation of wide-band electromagnetic scattering problem of the ground is studied using small perturbation method. The curves of the scattering coefficient with varying of wavelength of the incident wave is derived. The influence of the root- mean-square of height fluctuation,fractal dimension,the moisture capacity of soil,temperature of soil on the scattering coefficient is discussed. The results show that the scattering coefficient is influenced by the root- mean- square of height fluctuation,fractal dimension and the moisture capacity of soil,while temperature of soil has little effect on the scattering coefficient.

关 键 词：宽带电磁散射 分形粗糙地面 微扰法 散射系数 

分 类 号：TN011[电子电信—物理电子学]