| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Low Frequency Ultra-Thin Compact Metamaterial Absorber Comprising Split-Ring Resonators |
| LIN Bao-Qin**, DA Xin-Yu, ZHAO Shang-Hong, MENG Wen, LI Fan, ZHENG Qiu-Rong, WANG Bu-Hong |
Institute of Information and Navigation, Air Force Engineering University, Xi'an 710077
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| Cite this article: |
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LIN Bao-Qin, DA Xin-Yu, ZHAO Shang-Hong et al 2014 Chin. Phys. Lett. 31 067801 |
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Abstract 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 absorbance 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.
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Published: 26 May 2014
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| PACS: |
78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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