一种基于蜂窝式的光学透明宽带超材料吸波器  

An optical transparent broadband metamaterial absorber based on honeycomb structure

作　　者：凌慧敏 LING Huimin(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学信息科学与工程学院,宁波315211

出　　处：《无线通信技术》2025年第1期27-30,35,共5页Wireless Communication Technology

摘　　要：在本文中,我们介绍了一种基于蜂窝结构的透明宽带超材料吸波器(MMA)。雷达吸波材料(RAM)在消除电磁干扰(EMI)或减小雷达散射截面(RCS)方面被广泛应用。我们提出的结构由六边形蜂窝结构组成,其侧壁贴有不同面阻值的氧化铟锡(ITO)薄膜。我们采用等效介质理论解释了该模型的工作原理,并对吸波器的物理机制进行了描述,同时进一步分析了不同面阻值的ITO薄膜的吸收功率。同时,我们还分析了高频衍射部分的影响。最后,通过电场分布说明TE模式和TM模式的吸收差异。通过仿真,我们展示了基于蜂窝结构的宽带超材料吸波器在正入射下4.26GHz至80GHz的超宽频段具有良好的电磁吸收功能。此外,该结构对TE模式的入射角高达60°,对TM模式的入射角高达70°不敏感。CST仿真结果表明,该结构不仅在宽频带内实现了高效吸收,而且具有极化不敏感特性,并且在结构上具有一定的力学稳定性。由于采用了透明介质和透明损耗薄膜的复合,该结构具有一定的光学透明性。In this paper,we introduce a transparent wideband metamaterial absorber(MMA)based on honeycomb structure.Radar absorbing materials(RAM)are widely used to eliminate electromagnetic interference(EMI)or reduce the radar scattering cross section(RCS).The proposed structure consists of hexagonal honeycomb structure with indium tin oxide(ITO)films with different surface resistance values on the side walls.We use the equivalent medium theory to explain the working principle of the model,describe the physical mechanism of the absorber,and further analyze the absorbed power of ITO films with different surface resistance values.At the same time,we also analyze the influence of the high frequency diffraction part.Finally,the absorption difference between TE mode and TM mode is illustrated by electric field distribution.Through simulation,we show that the broadband metamaterial absorber based on honeycomb structure has good electromagnetic absorption function in the ultra-wide band from 4.26GHz to 80GHz under normal incident.In addition,the structure is insensitive to incidence angles of up to 60°in TE mode and up to 70°in TM mode.CST simulation results show that the structure not only realizes high efficiency absorption in the wide band,but also has polarization insensitive characteristics and mechanical stability.Due to the composite of transparent medium and transparent loss film,the structure has certain optical transparency.

关 键 词：超材料吸波器 蜂窝结构 等效介质 衍射 极化不敏感 光学透明 

分 类 号：O441[理学—电磁学]