新型变极化角反射器设计及散射特性分析  

Design and analysis of a novel variable polarization corner reflector

作　　者：陈焱 王占领 肖科 庞晨 计一飞 李永祯[1] 王雪松[1] CHEN Yan;WANG Zhanling;XIAO Ke;PANG Chen;JI Yifei;LI Yongzhen;WANG Xuesong(State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China;Department of Electronic Science,College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China;Department of Intelligent Perception,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,电子信息系统复杂电磁环境效应国家重点实验室,长沙410073 [2]国防科技大学电子科学学院电子科学系,长沙410073 [3]国防科技大学电子科学学院智能感知系,长沙410073

出　　处：《电波科学学报》2023年第6期913-920,共8页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61971429,61921001,62301580);博士后基金(2022M723917)。

摘　　要：面向无源干扰灵活可调的发展需求,提出了一种基于极化栅加载的新型变极化角反射器,通过在金属角反射器内壁加载极化栅,以极低的成本实现了角反射器散射回波极化状态的灵活调控.以方形三面角反射器底面内壁加载圆形极化栅为例开展了仿真工作,分别对电磁波正入射以及宽角度入射两种不同场景下散射回波的极化特性进行了分析.仿真结果表明,所设计的变极化角反射器随着极化栅的旋转,回波出现显著的变极化响应,在Poincaré球上呈近似“8”字形,极化状态依次经历垂直线极化、左旋椭圆极化、水平线极化和右旋椭圆极化.此外,特定旋转角度下,经变极化角反射器调制的电磁回波在口面内呈现空域差异性.为验证所设计的新型角反射器的极化调控能力,利用PCB工艺加工制作了极化栅,并将其加载至角反射器内壁,开展了暗室测试,测试数据表明本文所提出的变极化角反射器在时间维和空间维上具备极化调控能力.因此,本文所提出的变极化角反射器在雷达对抗领域有广阔的应用前景.In this paper,a novel polarization adjustable corner reflector integrated with the polarization grid is proposed.By loading the variable polarization grid on the metal panel of the metal corner reflector,the scattering characteristics and polarization states of the corner reflector can be flexibly modulated.Taking the square trihedral corner reflector loading with a circular polarization grating over the inner wall of the square trihedral corner reflector as an example,the polarization characteristics of the echo scattering field under normal incidence and wide-angle incidence are analyzed respectively.The simulation results show that the scattering field of the designed variable polarization corner reflector has a significant polarization response with the rotation of the polarization grating,which is approximately in the shape of“8”on the Poincarésphere,and the polarization states undergo vertical linear polarization,left-handed elliptical polarization,horizontal linear polarization and right-handed elliptical polarization in turn.In addition,for the specific rotation angle,the scattered electromagnetic echoes modulated by the variable corner reflector also show regional differences in the aperture.The variable polarization corner reflector proposed in this paper is processed and assembled,and the experiment is carried out in the anechoic chamber.The test data validates that the variable polarization corner reflector has the ability of modulating polarization in both time and space domains,and has bright application prospects in radar countermeasures.

关 键 词：角反射器 极化栅 极化调控 电磁散射 时空 

分 类 号：TN957[电子电信—信号与信息处理]