光电子快报(英文版), 2015, 11 (6): 414, Published Online: Oct. 12, 2017  

Multi-band polarization insensitive metamaterial absorber with dual cross-wires structure

Author Affiliations
College of Information Science and Engineering, Ningbo University, Ningbo 315211, China
Abstract
A five-band metamaterial absorber (MMA) based on a simple planar structure is proposed. It utilizes different areas of a single unit cell to match impedance, and produces different absorptive frequencies. Numerical calculation shows that the MMA has five different absorption peaks at 3.78 GHz, 7.66 GHz, 10.9 GHz, 14.5 GHz and 16.7 GHz, and their absorption rates reach 95.5%, 98.6%, 95.7%, 96.6% and 99.8%, respectively. The proposed structure is polarization insensitive for transverse electric (TE) and transverse magnetic (TM) incident waves. Also, the absorptive characteristics over large incident angles are examined. In addition, we analyze the absorption mechanism by the surface current density and power flow density distributions. This simple structure provides a way to design multi-band MMA, and also saves the cost of fabrication.
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YAO Li-fang, LI Min-hua, ZHAI Xiao-min, WANG Hui-bo, DONG Jian-feng. Multi-band polarization insensitive metamaterial absorber with dual cross-wires structure[J]. 光电子快报(英文版), 2015, 11(6): 414.

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