宽带柔性透明超材料吸波体设计  

Design of Flexible and Transparent Metamaterial Absorber with Broadband

作　　者：黄晓俊 高丽娜 曹苗 姚旺 杨河林[3] HUANG Xiaojun;GAO Lina;CAO Miao;YAO Wang;YANG Helin(College of Communication and Information Engineering,Xi′an University of Science and Technology,Xi′an 710054,China;School of Electronics and Information,Northwestern Polytechnical University,Xi′an 710072,China;College of Physical Science and Technology,Central China Normal University,Wuhan 430079,China)

机构地区：[1]西安科技大学通信与信息工程学院,西安710054 [2]西北工业大学电子信息学院,西安710072 [3]华中师范大学物理科学与技术学院,武汉430079

出　　处：《光子学报》2024年第8期91-101,共11页Acta Photonica Sinica

基　　金：国家自然科学基金(No.42274189);陕西省重点研发计划项目(No.2022GD-TSLD-64)。

摘　　要：基于阻抗匹配原理提出一种具有宽带微波吸收、高灵活性和高透光性的超薄反射型超材料吸波体,该吸波体由硬度小且高度光学透明的导电膜和介质基板构成,可实现柔性和高透光性。电磁仿真结果表明:在8.22~22.76 GHz的频率范围内,吸波体的吸收率大于90%,吸收总带宽为14.54 GHz,相对吸收带宽达93.9%。由于谐振层图案的中心对称特点,吸波体表现出对电磁波极化不敏感的特性。此外,对于入射角小于60°的电磁波,它仍然表现出良好的吸收性能。该研究结果表明所提出的超材料吸波体在医疗设备、航空航天以及雷达隐身方面具有巨大的应用潜力。Electromagnetic metamaterials absorbers provide indispensable technical support and important application value for communication,radio,radar,stealth technology and medical imaging due to their excellent electromagnetic wave regulation performance.Current research targets wideband absorbers,essential for handling multiple bands and adapting to complex electromagnetic environments.Traditional absorbers face challenges like complex structures and low transmittance and inflexibility,limiting technological progress.Recently,the transparent flexible metamaterial absorbers based on conductive films have played a great role in improving the absorption bandwidth.Nevertheless,most of the transparent flexible metamaterial absorbers that have been proposed still do not meet the size and thickness limitations of absorbers in special application scenarios such as mobile communication devices and satellite communication antennas.Therefore,the study of transparent flexible absorber with high absorption efficiency,thin thickness,light weight and wide absorption frequency band is of great significance for practical application.In this study,a transparent,flexible,small size and low profile metamaterial absorber is designed based on indium tin oxide conductive film and polyvinyl chloride.The absorber is mainly composed of three parts:a patterned conductive film layer at the top,a medium layer in the middle and a base layer completely covered by a low square resistance conductive film.Firstly,by combining the impedance matching principle,CST Studio Suite 2021 simulation software is used to calculate the absorptivity and S-parameters.Constantly adjust the pattern of the top conductive film,and finally determine the top periodic unit pattern.Secondly,other structural parameters are optimized by parameter scanning to achieve the best absorption,and the influence of the change of key parameters on the absorptivity is analyzed.In addition,the absorption performance of the 10×10 array structure at different bending angles is verified an

关 键 词：超材料 宽带吸波体 阻抗匹配 柔性结构 极化不敏感 光学透明 导电膜 

分 类 号：O451[理学—无线电物理]