A novel ultra-wideband reflective cross-polarization converter based on anisotropic metasurface

M. M. Couto, M. W. B. Silva and A. L. P. S. Campos

Journal of Electromagnetic Waves and Applications, 2021, vol. 35, issue 12, 1652-1662

Abstract: An ultra-thin and ultra-wideband anisotropic metasurface, acting as a linear polarization converter through reflection is designed and simulated in this research. The operation frequency range covers almost completely the Ku-band and the entire K- and Ka-band. The unit cell of the proposed metasurface is composed of a arrangement of concentric square metallic loops on a grounded dielectric substrate, in which a diagonal split is made, providing properties of an anisotropic material. Simulation results show that an efficient cross-polarization conversion, both for normal as well as for oblique incidence, is achieved with $ -10 $ −10 dB fractional bandwidth of 98.7% from 13.8 GHz to 40.7 GHz and with an average polarization conversion ratio of 97.5%. The ultra-wideband of the proposed structure results from multiple plasmonic resonances occurring at three neighboring frequencies (15.2 GHz, 25.9 GHz, and 38 GHz) resulting in a significant expansion of the operating frequency range.

Date: 2021
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DOI: 10.1080/09205071.2021.1914742

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