矩量法研究分层粗糙面与运动圆形截面柱的复合电磁散射  

Method of Moment Investigation on Composite Electromagnetic Scattering of Layered Rough Surface and Moving Circular Cross-Section Column

作　　者：于少帅 任新成[1] 杨天赐 朱小敏[1] 赵晔[1] YU Shaoshuai;REN Xincheng;YANG Tianci;ZHU Xiaomin;ZHAO Ye(School of Physics and Electronic Information,Yan’an University,Yan’an,Shaanxi Province 716000,China)

机构地区：[1]延安大学物理与电子信息学院,陕西延安716000

出　　处：《现代应用物理》2023年第3期196-201,共6页Modern Applied Physics

基　　金：国家自然科学基金资助项目(61861043,62261054,62061048)。

摘　　要：为满足地、海表面上方雷达目标检测、识别和分类等的需要,采用蒙特卡罗方法生成高度起伏遵守指数分布的分层土壤表面;选用Topp模型模拟土壤介电常数。运用矩量法研究了锥形波入射条件下分层土壤表面与其上方运动的圆形截面柱的复合电磁散射问题,数值计算了复合散射系数随散射角的变化关系,分析了圆形截面柱在土壤表面上方横向移动、纵向移动、斜向移动及电磁波入射角和粗糙面间距对复合散射系数的影响。研究结果表明,目标在纵向移动和斜向移动时,散射系数会受到较大的影响,而横向移动的对散射系数的影响较小,同时两层粗糙面的间距对复合散射系数的影响也比较显著。相关结果可为相关领域工程问题提供理论依据和实践方法。To meet the needs of radar target detection,recognition,and classification above the ground and sea surfaces,Monte Carlo method is used to generate a layered soil surface with high undulation that follows an exponential distribution.Topp model is chosen to simulate soil dielectric constant.Method of moment is used to study the composite electromagnetic scattering of a layered soil surface and a moving circular cross-section column above it under the condition of conical wave incidence.The relationship between the composite scattering coefficient and the scattering angle is numerically calculated,and the effects of the transverse,longitudinal,and oblique movements of the circular cross-section column above the soil surface,as well as the electromagnetic wave incidence angle and the spacing between rough surfaces,on the composite scattering coefficient are analyzed.The results indicate that the scattering coefficient is greatly affected when the target moves longitudinally and obliquely,while the influence of lateral movement is relatively small.At the same time,the distance between the two rough surfaces has a significant impact on the composite scattering coefficient.The relevant results can provide theoretical basis and practical methods for engineering problems in the civil and military fields.

关 键 词：复合电磁散射 矩量法 圆形截面柱 运动目标:分层粗糙面 

分 类 号：TN011[电子电信—物理电子学] O441[理学—电磁学]