摘要
采用Monte Carlo方法模拟一维指数型粗糙土壤表面,运用矩量法研究了一维指数型粗糙土壤表面与下方二维导体方形截面柱体的复合电磁散射。通过数值计算得到了复合散射系数随散射角的变化曲线,并将目标尺寸趋于零和目标深度趋于无穷大时的结果与单独粗糙面FDTD结果进行了比对,验证了该算法的正确性。讨论了粗糙面高度起伏均方根、相关长度、土壤湿度、方形截面柱埋藏深度、方形截面边长、方形截面方位角、入射波频率对复合散射系数的影响。结果表明粗糙土壤表面面高度起伏均方根、相关长度、土壤湿度、方形截面柱埋藏深度、方形截面边长、方形截面方位角、入射波频率对复合散射系数的影响是比较复杂的。
One-dimensional exponential rough soil surface is simulated by Monte Carlo method,the composite electromagnetic scattering from one-dimensional exponential rough soil surface with buried PEC square cross-section column is studied using Method of Moment.The varying curves of composite scattering coefficient with scattering angle are obtained by numerical calculation,Further,the results when the dimension of target tends to zero and the buried depth tends to infinity were compared with the FDTD results based on the single rough surface.,validity of this method is verified.The influence of the root mean square and the correlation length of rough soil surface,the moisture of soil,the buried depth,the length of side and the placement azimuth of buried square cross-section column and the frequency of incident wave on the composite scattering coefficient are discussed.The numerical results show that the influence of the root mean square and the correlation length of rough soil surface,the moisture of soil,the buried depth,the length of side and the placement azimuth of buried square cross-section column and the frequency of incident wave on the composite scattering coefficient is more complex.
出处
《电子测量技术》
2011年第4期36-41,85,共7页
Electronic Measurement Technology
基金
中国博士后科学基金资助项目(20090461284)
陕西省自然科学基金资助项目(2010JM80177)
