一种基于天线空域极化特性差异的阵列极化滤波新方法  

A new array polarization filtering method based on the antenna space-polarization characteristic differences

作　　者：王奕清 王占领 周坚 庞晨 李永祯[1] WANG Yiqing;WANG Zhanling;ZHOU Jian;PANG Chen;LI Yongzhen(College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073

出　　处：《系统工程与电子技术》2025年第3期681-690,共10页Systems Engineering and Electronics

基　　金：国家自然科学基金(61921001,62301580);湖南省科技创新计划(2024RC3138)资助课题。

摘　　要：极化滤波方法能够在一定程度上有效对抗雷达主瓣干扰,但同时也对系统架构提出了较高要求。针对这一成本矛盾,提出一种基于单极化阵列中阵元空域极化特性差异的极化滤波新方法。该方法从差异机理出发,利用有源单元方向图求解极化方向图综合模型,得到同时多极化波束。对多波束接收信号进行正交极化分解,估计干扰极化参数,在此基础上实现干扰抑制极化滤波。基于阵列天线方向图暗室实测数据开展仿真实验,结果表明对于来波方向重合的目标和干扰信号,若其极化状态达到一定差异,所提方法能够实现有效的干扰抑制。该方法性价比优势明显,可为单极化阵列雷达系统升级改造提供新思路。Polarization filtering methods can effectively combat radar anti-mainlobe interference to a certain extent,but they also impose high demands on system architecture.In response to this cost contradiction,a new array polarization filtering method based on the differences in polarization spatial characteristics of elements in a single-polarization is proposed.Starting from the mechanism of differences,this method utilizes the active element patterns to solve the polarized beam synthesis model,obtaining multiple polarized beams simultaneously.By decomposing the received signals from multiple beams into orthogonal polarizations and estimating interference polarization parameters,interference suppression polarization filtering is achieved.Simulation experiments are conducted based on measured pattern data from an antenna array in the anechoic chamber,and the results indicate that for targets and interference signals with overlapping directions of arrival,effective interference suppression can be achieved if their polarization states exhibit a certain level of difference.This method demonstrates significant cost-effectiveness advantages and provides new insights for upgrading and transforming single-polarization array radar systems.

关 键 词：极化滤波 抗主瓣干扰 有源单元方向图 极化方向图综合 

分 类 号：TN95[电子电信—信号与信息处理]