摘要
采用指数型分布粗糙面和Monte Carlo方法模拟实际的粗糙地面,运用时域有限差分法研究了超宽带高斯脉冲电磁波入射时粗糙地面与上方等边三角形截面柱的宽带后向电磁散射问题;通过数值计算得到了后向复合散射系数随频率的变化曲线,分析了不同的粗糙地面高度起伏均方根、相关长度,土壤湿度和三角形边长、倾角、高度及介电常数条件下后向散射系数随频率的变化关系,得到了指数型分布粗糙地面与上方目标的宽带后向电磁散射特性。
The actual rough land surface is simulated with the exponential type distribution rough surface and Monte Carlo method,the wideband back electromagnetic scattering from rough land surface and column with equilateral triangle cross-section above it under UWB Gaussian pulse electromagnetic wave incidence is studied using FDTD.The curves of back electromagnetic scattering coefficient varied with frequency are obtained by numerical calculation.The back electromagnetic scattering coefficient varying with frequency is analyzed under the difference of the root-meansquare of rough land height fluctuation,correlation length and the moisture capacity of soil,the side length of triangle,tilt angle,height and dielectric parameter.The characteristics of the wideband back electromagnetic scattering from rough land surface with the exponential type distribution and column with equilateral triangle cross-section above it are obtained.
出处
《电子测量技术》
2015年第12期1-5,共5页
Electronic Measurement Technology
基金
国家自然科学基金(61379026)
陕西省科学技术研究发展计划(工业攻关)(2014K05-61)
陕西省教育厅科研计划(14JK1830)项目
关键词
宽带电磁散射
粗糙地面
后向散射系数
三角形截面柱
FDTD
the wideband electromagnetic scattering
rough land surface
the back scattering coefficient
column with triangle cross-section
FDTD
