机械扫描天线电磁计算与距离像特征分析  

Electromagnetic computation of mechanical scanning antenna and characteristic analysis of its HRRP

作　　者：程永强[1] 秦玉亮[1] 李彦鹏[1] 王宏强[1] 黎湘[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《系统工程与电子技术》2010年第11期2317-2321,共5页Systems Engineering and Electronics

基　　金：武器装备预研基金(9140A03020408KG0109)资助课题

摘　　要：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,研究了机械扫描天线电磁散射特性的计算方法,并对其距离像特征进行了分析。首先采用图形电磁计算法对反射面天线的电磁散射特性进行了建模和计算,然后利用其宽频带雷达散射截面计算数据合成天线的一维距离像,进而对不同姿态下天线的距离像特征进行了分析。结果表明,由于天线的旋转,距离像序列的强度、宽度和位置呈现周期性的变化规律,从而为采用距离像序列对机械扫描天线进行识别以及对旋转周期和尺寸等参数的估计提供了可能。A graphical electromagnetic computing method for the mechanical scanning antenna is presented for detection and recognition to the guiding radar of air defense missile weapon system（ADMWS） using an active radar seeker.Firstly the electromagnetic scattering characteristic of the antenna is calculated using the graphical electromagnetic computation（GRECO） method,and then the high range resolution profile（HRRP） of the antenna is synthesized based on the wide-band calculation data.Finally the characteristics of range profiles of the antenna are analyzed.The results show that there are periodic changes such as intensity,width and distance in a series of HRRPs due to the rotation of the antenna,and it provides the possibility to estimate the size and rotation period of the antenna as well as to identify the mechanical scanning antenna using a series of HRRPs.

关 键 词：机械扫描天线 图形电磁计算 距离像序列 目标识别 

分 类 号：TN957[电子电信—信号与信息处理]