Design of a novel polarization insensitive pentabandTHzmetamaterial
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Abstract
Abstract This paper presents the design and characterization of a novel metamaterial with five distinct operating bands for THz applications. The proposed metamaterial is constructed using an ultra‐thin polyimide substrate. The proposed metamaterial has a square geometry with metallic patterns suitably designed to obtain the desired frequency characteristics. The metamaterial operates based on surface plasmon hybridization with stopband characteristics at 0.82, 1.96, 2.77, 3.40 and 4.74 THz. The metamaterial has a small geometry 0.082 λ o × 0.082 λ o where λ o is wavelength calculated under free‐space conditions at 0.82 THz. The operation of the proposed pentaband metamaterial is described using electric field distributions. The metamaterial reported in this paper has rotational symmetry and hence it is polarization independent. The performance of the metamaterial for various angles of incidence has been evaluated and the results reveal that the proposed metamaterial is stable up to ±70 degrees. The THz metamaterial is appropriate for components like frequency selective surface, sensors and detectors.
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