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Ultra-Thin Multi-Band Polarization-Insensitive Microwave Metamaterial Absorber Based on Multiple-Order Responses Using a Single Resonator Structure

1
School of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
2
School of Electronic and Information Engineering, Hubei University of Science and Technology, Xianning 437100, China
3
School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
*
Author to whom correspondence should be addressed.
Materials 2017, 10(11), 1241; https://doi.org/10.3390/ma10111241
Received: 18 September 2017 / Revised: 19 October 2017 / Accepted: 26 October 2017 / Published: 27 October 2017
(This article belongs to the Section Advanced Composites)
We design an ultra-thin multi-band polarization-insensitive metamaterial absorber (MMA) using a single circular sector resonator (CSR) structure in the microwave region. Simulated results show that the proposed MMA has three distinctive absorption peaks at 3.35 GHz, 8.65 GHz, and 12.44 GHz, with absorbance of 98.8%, 99.7%, and 98.3%, respectively, which agree well with an experiment. Simulated surface current distributions of the unit-cell structure reveal that the triple-band absorption mainly originates from multiple-harmonic magnetic resonance. The proposed triple-band MMA can remain at a high absorption level for all polarization of both transverse-electric (TE) and transverse-magnetic (TM) modes under normal incidence. Moreover, by further optimizing the geometric parameters of the CSRs, four-band and five-band MMAs can also be obtained. Thus, our design will have potential application in detection, sensing, and stealth technology. View Full-Text
Keywords: metamaterial absorber; multi-band; polarization-insensitive; circular sector resonator structure metamaterial absorber; multi-band; polarization-insensitive; circular sector resonator structure
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MDPI and ACS Style

Cheng, Y.Z.; Cheng, Z.Z.; Mao, X.S.; Gong, R.Z. Ultra-Thin Multi-Band Polarization-Insensitive Microwave Metamaterial Absorber Based on Multiple-Order Responses Using a Single Resonator Structure. Materials 2017, 10, 1241.

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