Alpha-stable粗糙面与下方目标的复合电磁散射研究

摘要

基于Alpha-stable分布在通信、电子、雷达等领域的应用,采用空间域合成法生成高度起伏遵守Alpha-stable分布的粗糙土壤表面,根据四成分模型模拟粉沙壤土的介电常数,运用矩量法研究了锥形入射波入射下粗糙土壤表面与下方三角形截面柱体的复合电磁散射问题.数值计算了散射系数随散射角的变化关系,分析了稳定性系数、归一化尺度参数、互相关长度、入射波频率、土壤湿度、三角形截面柱边长、目标方位角、三角形截面柱埋藏深度对散射系数的影响.该研究结果在军事、民用、通信、工业等多领域具有一定的理论价值.%The spatial domain building method is used to generate rough soil surface with Alpha-stable distributions based on the Alpha-stable distribution application in field of communication ,electronics and radar. According to the four-component model to simulate dielectric constant of silt loam,the composite electromagnetic scattering problems from the rough soil surface with underneath column of triangular cross section are studied by using the moment method under the tapered incident wave incident. The varying relationship of composite scattering coefficient with scattering angle is numerically calculated,and the influences of the stability coefficient,the normalized scale parameter,the cross-correlation length,the incident wave frequency,the moisture of soil,the length of side,the azimuth angle and the buried depth of triangular cross section column on the composite scattering coefficient are analyzed. This research results have certain theoretical value in the field of military,civil use,communication,industry and so on.