摘要
采用土壤介电常数的四成分模型表示沙土的介电特性,应用高斯型分布粗糙面模型和Monte Carlo方法模拟实际的沙地表面,运用矩量法研究了沙地粗糙面与下方埋藏导体圆柱的复合散射.数值计算得到了复合散射系数随散射角的变化曲线,得出了粗糙面高度起伏均方根、相关长度、圆柱埋藏深度、圆柱半径、圆柱水平位置及入射波频率对复合散射系数的影响,并分析了原因.结果表明,圆柱的埋藏深度、半径、水平位置、入射波频率等对复合散射系数有明显的影响.
The dielectric property of the sandy soil is described using four-component model of dielectric constant of soil. The sandy surface is simulated with model of gaussian type distribution rough surface and Monte Carlo method,and the composite electromagnetic scattering from rough sandy surface with buried cylinder is studied using moment method. The bistatic scattering coefficient（BSC）with scattering angle are obtained by numerical calculation. The influence of the root mean square,the correlation length of rough sandy surface,the buried depth,the radius of cylinder,the position of buried cylinder and the frequency of incident wave on the composite scattering coefficient are discussed. The numerical results show that the root mean square,the correlation length of rough sandy surface, the buried depth,the radius of cylinder,the horizontal position of buried cylinder and the frequency of incident wave have obvious influence on the composite scattering coefficient.
出处
《河南科学》
2015年第9期1504-1511,共8页
Henan Science
基金
国家自然科学基金资助(61379026)
陕西省自然科学基础研究计划项目(2014JM-6113)
延安市科技计划项目(2014ZC-4)
延安大学校级科研项目资助(YDQ2014-0040)
