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Broadband and conformal metamaterial absorber |
Xiangkun KONG1,2( ), Junyi XU1, Jin-jun MO3, Shaobin LIU1 |
1. Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 2. State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China 3. College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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Abstract In this study, a new broadband and conformal metamaterial absorber using two flexible substrates was proposed. Simulation results showed that the proposed absorber exhibited an absorption band from 6.08 to 13.04 GHz and a high absorption of 90%, because it was planar. The absorber was broadband as its relative absorption bandwidth was 72.8%. Moreover, the proposed absorber was insensitive to the polarization of the TE and TM waves. The absorber was ultra-thin; its total thickness was only 0.07λ at the lowest operating frequency. Furthermore, different regions of absorption can be adjusted by lumping and loading two resistors onto the polyimide film, respectively. Moreover, compared with the conventional microwave absorber, the absorption bandwidth of the proposed absorber can be broadened and enhanced when it was bent and conformed to the surface of objects. Experimental and simulation results were in agreement. The proposed absorber is a promising absorbing element in scientific and technical applications because of its broadband absorption, polarization insensitivity, and flexible substrates.
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Keywords
absorber
metamaterials
flexible
broadband
conformal
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Corresponding Author(s):
Xiangkun KONG
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Just Accepted Date: 28 March 2017
Online First Date: 17 April 2017
Issue Date: 05 July 2017
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