雷达目标散射中心正向模型扩展及散射特性分析  

Extension of Radar Target Scattering Center Forward Model and Analysis of Scattering Characteristics

作　　者：李臻 化梦博 杨泽望[1] 刘建[1] 何思远[2] 边志丹 LI Zhen;HUA Mengbo;YANG Zewang;LIU Jian;HE Siyuan;BIAN Zhidan(Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China;School of Electronic Information,Wuhan University,Wuhan 430072,China)

机构地区：[1]北京跟踪与通信技术研究所,北京100094 [2]武汉大学电子信息学院,武汉430072

出　　处：《电讯技术》2024年第11期1850-1857,共8页Telecommunication Engineering

摘　　要：为满足雷达目标特性规划、特征信号控制和优化设计需求,有必要将散射中心正向建模方法拓展至涂覆目标。有鉴于此,从目标几何模型和分区部件涂覆介质阻抗参数出发,结合空间射线分集及追踪技术,通过正向途径将目标整体散射特性分解并离散化为多个部件级散射源。通过高频电磁理论定量计算和推导散射源三维相位中心(位置参数)、散射贡献(幅度参数)、频率依赖因子、分布宽度等参数,针对介质涂覆(或局部涂覆)电大尺寸目标开展了散射中心正向模型扩展与散射特性分析。以简化坦克为例,对目标强散射结构表面涂覆吸波材料,针对性降低其散射幅值,进而改变目标的强散射源分布,结果验证了所提模型的准确性和可行性。To meet the requirements of radar signature planning,feature signal control,and optimized design,it becomes imperative to extend the forward modeling approach to coated targets.In view of this,the research initiates from the geometric model of the target and the impedance parameters of its partitioned components.By integrating spatial ray diversity and tracking technique,the overall scattering characteristics of the target are systematically decomposed into multiple component-level scattering sources through a forward approach.Subsequently,employing high-frequency electromagnetic theory,the three-dimensional phase center(position parameter),scattering contribution(magnitude parameter),frequency-dependent factors,and distribution width of the scattering sources are quantitatively computed and derived.This research expands upon the forward modeling of scattering centers(SCs)and analyzes the scattering characteristics for large-scale targets with dielectric coatings(or localized coatings).Taking the example of a simplified tank coated with absorptive material on its strong scattering surface,the specific reduction in its scattering magnitude is achieved,subsequently altering the distribution of strong scattering sources.The results validate the accuracy and feasibility of the proposed model.

关 键 词：涂覆目标 雷达目标特性规划 散射中心 正向建模 

分 类 号：TN957.52[电子电信—信号与信息处理]