小型化偏振不敏感宽带雷达吸波体结构研究  

Study on the Structure of Miniaturized Polarization Insensitive Broadband Radar Absorber

作　　者：陈洁萍[1] 陆世鹏 艾矫燕[2] CHEN Jieping;LU Shipeng;AI Jiaoyan(School of Big Data,Guangxi Vocational&Technical College,Nanning 530226,China;School of Electrical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西职业技术学院大数据学院,南宁530226 [2]广西大学电气工程学院,南宁530004

出　　处：《火力与指挥控制》2022年第12期59-64,71,共7页Fire Control & Command Control

基　　金：教育部科技中心重点项目(019ITA01002);广西高校中青年教师科研基础能力提升项目(2021KY0982,2019KY1215)。

摘　　要：针对传统频率选择雷达吸波体存在的尺寸和偏振敏感性问题,提出了一种偏振不敏感宽带吸波体结构。该结构的顶部为周期性排列的褶曲状交叉偶极拓扑,并在拓扑上采用了对称地集总电阻以实现宽带吸收。该结构的底部通过方形槽拓扑来实现带内传输。对整个结构的表面电流分布、等效电路模型和多种参数变化的影响进行分析。研究结果表明,无论是正入射情况还是斜入射情况,该结构原型的测量结果与模拟结果均吻合较好,在2.18 GHz~9.80 GHz范围内有较宽的吸收带(反射系数低于-10 dB),传输带出现在6 GHz处,插入损耗为0.56 dB。不同于现有的雷达吸波体结构,所提结构可以实现带内传输响应,且具有紧凑拓扑结构、偏振不敏感性和角度稳定性。Aiming at the problems of size and polarization sensitivity problem in traditional frequency selective radar absorber,a polarization insensitive broadband absorber structure is proposed.Firstly,the top of the structure is a periodically arranged folded cross dipole topology,and symmetrically lumped all-in resistors are used in topology to realize broadband absorption.Secondly,the square slot topology is used at the bottom of the structure to realize in-band transmission.Finally,the surface current distribution of the whole structure,the equivalent circuit model and the influence of various parameters variation are analyzed.The research results show that whether in normal incidence condition or in oblique incidence condition,the measured results of the prototype structure are in good agreement with the simulation results,and it has a wide absorption band(the reflection coefficient is lower than-10 dB)in the range of 2.18 GHz~9.80 GHz,and the transmission band appears at 6 GHz with an insertion loss of 0.56 dB.Different from the existing radar absorber structure,the proposed structure can realize in-band transmission response,and has compact topology,polarization insensitivity and angular stability.

关 键 词：雷达吸波体 频率选择 交叉偶极拓扑 偏振敏感性 角度稳定性 

分 类 号：TN820[电子电信—信息与通信工程]