平面隙缝阵列天线的宽带电磁散射特性分析

 针对主动雷达导引头对防空导弹武器系统制导雷达站检测与识别的需求,研究了平面隙缝阵列天线的宽带电磁散射特性.将天线的电磁散射机理与目标高频散射中心理论相结合,建立了天线的电磁散射模型,分别采用矩量法和物理光学法计算天线的模式项散射场和结构项散射场,并从理论上证明了天线散射中心的客观存在,分析了隙缝阵列天线的散射中心分布特征.最后对不同视角下天线的高分辨距离像进行了仿真,为进一步理解天线的电磁散射机理、分析其宽带电磁散射特性、以及采用高分辨率成像技术对雷达站进行检测与识别奠定了基础.

Analysis of Wide-Band EM Scattering Characteristics of Planar Slotted Array Antenna

A technique on analyzing the wide-band EM scattering characteristics of planar slotted array antenna is presented for detection and recognition to the guiding radar of Air Defense Missile Weapon System (ADMWS) using an active radar seeker.The EM scattering model of the antenna is firstly set up based on the electromagnetic scattering mechanism and the radar scattering center theory.Then the method of moments (MOM) and physical optics (PO) are used to calculate the mode scattering and structural scattering field of the antenna.The existence of scattering centers of antenna is proved in theory,and the distribution of antenna’s scattering centers is indicated.Finally,the paper presents a simulation of high range resolution profile (HRRP) of the antenna which establishes a foundation for the research on detection and recognition algorithms for antenna.