基于超表面的三频带吸波器
Tri-band absorber based on metasurface
喻卫军 1盛子腾 2张易成 2韩连福 3刘兴斌 1付长凤2
作者信息
- 1. 东北石油大学物理与电子工程学院,黑龙江大庆 163318
- 2. 常熟理工学院电子信息工程学院,江苏苏州 215500
- 3. 常熟理工学院电气与自动化工程学院,江苏苏州 215500
- 折叠
摘要
针对多频带和完美吸波器的应用需求,本文设计一种基于超表面的三频带吸波器.所提出的吸波器由金属图案层、中间介质层和金属底板组成.研究表明,该吸波器在5.16 GHz(C波段)、7.27 GHz(C波段)和8.32 GHz(X波段)3个谐振频率处的吸波率分别为99.98％、99.94％和99.98％,可实现近乎完美吸收.利用阻抗匹配理论阐明所提出设计产生3个谐振频率的原因.对谐振频率处的表面电流、电场和磁场分布进行仿真,分析三频带吸波机理.通过改变吸波器顶层金属图案的数量可实现单频带、双频带和三频带的调控.此外,研究吸波率对极化角和入射角的依赖性,结果表明该吸波器具有良好的极化不敏感性和广角稳定性(0°-60°).所提出的基于超表面的三频带吸波器具有易于设计和轻薄等特点,在电磁吸波、隐身、传感等领域有巨大的应用潜力.
Abstract
For the application requirements of multi-band and perfect absorber,a tri-band absorber based on metasurface is designed in this paper.The proposed absorber consists of a metallic pattern layer,an intermediate dielectric layer and a metallic bottom plate.The results show that the absorber has absorptivity of 99.98％,99.94％and 99.98％at three resonant frequencies of 5.16 GHz(C-band),7.27 GHz(C-band)and 8.32 GHz(X-band),which can achieve almost perfect absorption.The origin of three resonant frequencies is analyzed by impedance matching theory.The analysis of the surface current,electric field and magnetic field distributions are simulated at resonant frequency to explain the tri-band absorption mechanism.The regulation of single band,dual band and tri-band can be obtained by changing the number of metallic patterns on the top layer of the absorber.Moreover,the dependence of the absorptivity on polarization angle and incidence angle is studied,and the results show that the absorber has good polarization insensitivity and wide-angle stability(0°-60°).The proposed tri-band absorber based on metasurface has the characteristics of easy design and thin and light,and has great application potential in the fields of electromagnetic absorption,stealth,and sensing.
关键词
超表面/三频带/吸波器/极化不敏感Key words
metasurface/tri-band/absorber/polarization insensitive引用本文复制引用
出版年
2024
NETL
NSTL
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