摘要
针对海洋大气波导环境下电大尺寸目标电磁散射特性预测难题,提出了一种结合三维抛物方程(parabolic equation,PE)法和物理光学(physical optics,PO)法的混合计算方法。在该方法中,PE法被用于求解电磁波在背景环境中的传播,PO法被用于计算目标对雷达波的散射,同时平面波谱分解技术被引入以实现两种算法的有效衔接。为验证该方法的正确性和有效性,对平坦地面上金属球目标的散射进行了模拟,并将结果与多层快速多极子算法(multilevel fast multipole algorithm,MLFMA)和PO法的计算结果进行了对比。然后将该方法应用于不同高度蒸发波导环境下舰船目标的电磁散射预测。结果表明,所提出的PE-PO方法能够有效考虑大气波导对照射激励和目标散射过程的影响,为剖析和理解大气波导环境下电大尺寸目标的电磁散射特性提供了一种新的技术途径。
To address the challenge of predicting electromagnetic scattering characteristics of electrically large targets in a maritime atmospheric duct environment,this paper proposes a hybrid computational method combining the three-dimensional parabolic equation method(PE)and the physical optics method(PO).In this approach,the PE is employed to solve the propagation of electromagnetic waves in the background environment,while the PO is used to calculate the scattering of radar waves by the target.Additionally,a plane wave spectrum decomposition technique is introduced to facilitate the efficient integration of the two algorithms.The proposed method is validated through scattering simulation experiments involving a metallic sphere over a flat surface,where it is compared with results from the multilevel fast multipole algorithm(MLFMA)and the PO method.Finally,the proposed method is applied to predict the electromagnetic scattering of a ship target under evaporation ducts of varying heights.The results demonstrate that the proposed PE-PO method effectively accounts for the influence of atmospheric ducts on both the incident wavefront and the target scattering process,providing a novel technical approach for analyzing and understanding the electromagnetic scattering characteristics of electrically large targets in ducting environments.
作者
余洪鑫
冯菊
欧阳琪翔
廖成
YU Hongxin;FENG Ju;OUYANG Qixiang;LIAO Cheng(Institute of Electromagnetics,Southwest Jiaotong University,Chengdu 610031,China)
出处
《电波科学学报》
北大核心
2025年第1期29-36,共8页
Chinese Journal of Radio Science
基金
国家自然科学基金(62271416)。
关键词
电磁散射
大气波导
抛物方程(PE)法
物理光学(PO)法
混合方法
electromagnetic scattering
atmospheric duct
parabolic equation method(PE)
physical optics(PO)method
hybrid method
作者简介
通信作者:廖成(1964-),男,重庆人,西南交通大学电磁场与微波技术研究所教授,博士,研究方向为计算电磁学、天线理论及应用、电波传播和电磁兼容等。Email:c.liao@swjtu.edu.cn;余洪鑫(1996-),男,四川人,西南交通大学电磁场与微波技术研究所博士生,研究方向为计算电磁学、电波传播和电磁散射等。E-mail:yuhongxin@my.swjtu.edu.cn;冯菊(1979-),女,四川人,西南交通大学电磁场与微波技术研究所副教授,博士,研究方向为电波传播、无线信道建模和天线理论及应用等。E-mail:fengju-fj@swjtu.edu.cn;欧阳琪翔(2001-),男,江西人,西南交通大学电磁场与微波技术研究所博士生,研究方向为电波传播、电磁散射和涡旋电磁波理论等。E-mail:oyqx@my.swjtu.edu.cn。
