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Articles

A new tunable dual-band metamaterial absorber with wide-angle TE and TM polarization stability

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Pages 774-785 | Received 17 Nov 2014, Accepted 24 Feb 2015, Published online: 01 Apr 2015
 

Abstract

In this research, a new tunable dual-band metamaterial absorber with wide-angle TE and TM polarization stability is proposed. The designed absorber exhibits two high absorption peaks at 5.1 and 8.5 GHz with absorption peaks of 96 and 97%, respectively. The unit cell consists of a metallic background plane and two closed rings including two groups of T-shaped resonators, separated by a low-cost dielectric layer with thickness of 0.9 mm. By tuning the distance between the T-shaped structures and closed ring, the corresponding two resonance frequencies can be effectively separated with high absorption over 95% while keeping the closed ring unchanged. The simulated results demonstrate that the designed absorber has good characteristics of high absorption rates, polarization-insensitiveness and wide angle of incident waves. A waveguide experiment is performed to verify the good agreement between the simulated and measured results.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work is supported by the NSFC [contract number 61101066]; the Natural Science Basic Research Plan in Shaanxi Province of China [grant number 2014JM8316]; Fundamental Research Funds for the Central Universities [grant number JB140232].

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