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

Huiqing Zhai, Chuanhan Zhan, Lu Liu and Changhong Liang

Journal of Electromagnetic Waves and Applications, 2015, vol. 29, issue 6, 774-785

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.

Date: 2015
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DOI: 10.1080/09205071.2015.1024335

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