Low Frequency Ultra-Thin Compact Metamaterial Absorber Comprising Split-Ring Resonators

We present a design of a low frequency ultra-thin compact and polarization-insensitive metamaterial absorber （MA）. The designed MA is a two-layer structure, a periodic array of novel split-ring resonators （SRRs）, which are constructed in an FR4 dielectric layer, and another ultra-thin grounded sheet...

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Bibliographic Details
Published in:Chinese physics letters 2014-06, Vol.31 (6), p.211-214
Main Author: 林宝勤 达新宇 赵尚弘 蒙文 李凡 郑秋容 王布宏
Format: Article
Language:English
Subjects:
Arrays
Computer simulation
Dielectrics
Low frequencies
Metamaterials
Resonators
Simulation
Wavelengths
低频
偏振不敏感
吸波体
开口环
材料
紧凑型
谐振器
超薄
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Summary:We present a design of a low frequency ultra-thin compact and polarization-insensitive metamaterial absorber （MA）. The designed MA is a two-layer structure, a periodic array of novel split-ring resonators （SRRs）, which are constructed in an FR4 dielectric layer, and another ultra-thin grounded sheet is attached to the bottom. Numerical simulated results show that the proposed MA can realize effective absorption at the frequency 281.9 MHz, and its overall thickness is just only 0.29% of the resonant wavelength, the unit space is only 2.57%, and the absorbanee is kept well for a wide range of incident angles for different polarizations. In addition, the proposed MA is changed into a more compact one when the inter-digital structures are introduced in the SRRs. One convenient experiment is carried out in a rectangular waveguide simulator.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/31/6/067801