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Materials 2018, 11(1), 107; https://doi.org/10.3390/ma11010107

Theoretical Analysis and Design of Ultrathin Broadband Optically Transparent Microwave Metamaterial Absorbers

1
Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), Shanghai 200050, China
2
Department of Electronic Engineering and Information Science, University of Science and Technology of China (USTC), Hefei 230027, China
3
University of Chinese Academy of Sciences (UCAS), Beijing 100049, China
4
Department of Telecommunication Engineering, Mehran University of Engineering & Technology, Jamshoro 72062, Pakistan
*
Authors to whom correspondence should be addressed.
Received: 8 December 2017 / Revised: 7 January 2018 / Accepted: 8 January 2018 / Published: 11 January 2018
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Abstract

Optically Transparent Microwave Metamaterial Absorber (OTMMA) is of significant use in both civil and military field. In this paper, equivalent circuit model is adopted as springboard to navigate the design of OTMMA. The physical model and absorption mechanisms of ideal lightweight ultrathin OTMMA are comprehensively researched. Both the theoretical value of equivalent resistance and the quantitative relation between the equivalent inductance and equivalent capacitance are derived for design. Frequency-dependent characteristics of theoretical equivalent resistance are also investigated. Based on these theoretical works, an effective and controllable design approach is proposed. To validate the approach, a wideband OTMMA is designed, fabricated, analyzed and tested. The results reveal that high absorption more than 90% can be achieved in the whole 6~18 GHz band. The fabricated OTMMA also has an optical transparency up to 78% at 600 nm and is much thinner and lighter than its counterparts. View Full-Text
Keywords: metamaterial; microwave absorber; controllable design approach; optical transparency; absorption mechanism; broadband absorption metamaterial; microwave absorber; controllable design approach; optical transparency; absorption mechanism; broadband absorption
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Deng, R.; Li, M.; Muneer, B.; Zhu, Q.; Shi, Z.; Song, L.; Zhang, T. Theoretical Analysis and Design of Ultrathin Broadband Optically Transparent Microwave Metamaterial Absorbers. Materials 2018, 11, 107.

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