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Ultra-thin broadband metamaterial absorber

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Abstract

The design, fabrication, and measurements of a broadband metamaterial absorber are reported. The proposed metamaterial absorber consists of circular metallic patches and a metallic ground plane separated by a dielectric layer. Increasing the number of metallic patches can broaden the frequency range when their resonances are closely packed together, thereby resulting in a broadband resonance. Experimental results show that the proposed absorber has high absorptivity, with a full width at half maximum absorption bandwidth of 2.8 GHz and the relative FWHM absorption bandwidth of 25.3 %. In addition, the absorber can operate at a wide range of incident angles under both transverse electric and transverse magnetic polarizations.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China under Grants 50872113, 50936002, and by the NPU Foundation for Basic Research under Grant JC201154.

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Authors and Affiliations

  1. Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi’an, 710072, People’s Republic of China

    Yahong Liu, Shuai Gu, Chunrong Luo & Xiaopeng Zhao

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  1. Yahong Liu
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  2. Shuai Gu
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  3. Chunrong Luo
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  4. Xiaopeng Zhao
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Correspondence to Yahong Liu.

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Liu, Y., Gu, S., Luo, C. et al. Ultra-thin broadband metamaterial absorber. Appl. Phys. A 108, 19–24 (2012). https://doi.org/10.1007/s00339-012-6936-0

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