雪层覆盖的粗糙地面与导体目标复合电磁散射FDTD研究

运用时域有限差分方法（FDTD）研究了指数型分布的雪层覆盖的粗糙地面与上方矩形截面导体柱的复合电磁散射，计算了复合电磁散射的双站散射系数，得到了复合散射系数随散射角变化的曲线，讨论了粗糙面高度起伏均方根、相关长度、雪层厚度、土壤湿度以及目标高度、尺寸等参数对复合散射系数的影响，得到了指数型分布分层地面与矩形截面柱复合电磁散射的特性。

FDTD for Investigation of Electromagnetic Scattering Interaction between the conducting target and rough Land Surface Covered with Snow

The electromagnetic scattering interaction between the exponential type distribution rough land surface covered with snow and the conducting column with rectangular cross-section is studied using FDTD.The composite bistatic electromagnetic scattering coefficient is calculated.The curves of composite scattering coefficient with varying scattering angle are obtained.The influence of the root mean square and correlation length of rough land surface with layered medium,the depth of snow,the moisture capacity of soil,and the height,size of the target on the composite scattering coefficient are discussed.The characteristics of composite electromagnetic scattering from the exponential type distribution layered land surface with the conducting column with rectangular cross-section is obtained.