多光谱雷达-红外兼容超宽带隐身超表面  

Multispectral Radar-Infrared Compatible Ultra-Wideband Stealth Metasurface

作　　者：王佳云 康晋峰 屈增 段俊萍 张斌珍 Wang Jiayun;Kang Jinfeng;Qu Zeng;Duan Junping;Zhang Binzhen(State Key Laboratory of Dynamic Measurement Technology,School of Instrument and Electronics,North University of China,Taiyuan 030051,Shanxi,China)

机构地区：[1]中北大学仪器与电子学院省部共建动态测试技术国家重点实验室,山西太原030051

出　　处：《光学学报》2024年第20期260-268,共9页Acta Optica Sinica

基　　金：国家自然科学基金(52175555);创新研究群体项目(51821003);山西省基础研究计划(20210302123074,202203021212120);省部共建动态测试技术国家重点实验室开放基金(2023-SYSJJ-03)。

摘　　要：随着目标隐身的需求日益增长,以及多光谱结合探测技术的应用越来越广泛,对多光谱结合隐身技术的研究显得尤为紧迫。本文提出并制备了一种基于高集成度超表面的超宽带多光谱隐身材料,并对其进行了测试。该材料由雷达吸波层和红外屏蔽层组成,能够在雷达频段4.16~23.15 GHz范围内实现超过90%的电磁屏蔽,雷达散射截面(RCS)缩减达到-10 dB以上。同时,在红外频段3~14μm范围内,该材料的红外发射率低于0.3。通过等效电流分布和等效电路模型对超表面的工作原理进行了分析,并探讨了其工作性能的角度稳定性。此外,制备样品的实验测试结果与仿真计算结果相吻合。Objective In modern military strategic and tactical operations,achieving low detectability of targets has become a critical requirement.With the continuous enhancements in battlefield intelligence and reconnaissance capabilities,as well as the steady improvements in sensor technology,traditional singleband stealth techniques are no longer sufficient to address the complexities of modern warfare.Consequently,the ability to counter multispectral sensing systems is crucial for ensuring the survival and operational effectiveness of military units.In this study,we propose and successfully fabricate a novel,highintegrity,ultrawideband multispectral stealth material.This material is primarily composed of two functional layers:an absorbing layer specifically designed for radar frequencies and a shielding layer for the infrared spectrum.This configuration allows the material to manage electromagnetic waves over a broad bandwidth,effectively achieving signal shielding and a significant reduction in radar cross section(RCS)during radar detection.Simultaneously,the infrared shielding layer has a very low emissivity,thus reducing detectability in the infrared spectrum.To validate the material’s effectiveness,systematic experimental fabrication and testing are conducted on material samples.The results demonstrate that the material exhibits excellent stealth characteristics within the specified frequency ranges,with experimental outcomes consistent with simulation predictions.Methods A key challenge in designing multifunctional devices integrated with multilayer metasurfaces is eliminating interference among various functionalities.In our structural design process,we employ joint simulations using MATLAB and CST to optimize the geometric parameters of the structure.The MATLAB Optimization Toolbox is used to refine the postprocessing outputs from CST,ensuring an optimal design structure.For the simulations,unit cell boundary conditions are applied along the X and Y axes to simulate a periodic array model,while an open boundary

关 键 词：表面光学 超表面 多光谱 雷达隐身 红外隐身 超宽带 

分 类 号：O441[理学—电磁学]