A Design of high efficiency and wideband dual-functional  metasurface for polarization conversion and asymmetric  transmission

Hoa Nguyen Thi Quynh; Dinh Dat Nguyen; Van Nhan Pham; Dinh Lam Vu

doi:10.15625/0868-3166/21108

Author affiliations

Authors

Hoa Nguyen Thi Quynh Vinh University https://orcid.org/0000-0002-0955-8241
Dinh Dat Nguyen School of Engingeering and Techonology, Vinh University, 182 Le Duan, Vinh, Vietnam
Van Nhan Pham School of Engingeering and Techonology, Vinh University, 182 Le Duan, Vinh, Vietnam
Dinh Lam Vu Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi 10000, Vietnam

DOI:

https://doi.org/10.15625/0868-3166/21108

Abstract

A wideband and high-efficiency bi-functional metasurface for polarization conversion and asymmetric transmission (AT) based on the gratings/ polarization converter/gratings structure is proposed. The proposed metasurface structure consists of a two double-split ring structure array sandwiched by two orthogonal metallic sub-wavelength gratings. Using two orthogonal metallic
sub-wavelength gratings, the proposed metasurface reveals excellent AT effect and nearly perfect polarization conversion performance for linearly polarized waves. The proposed metasurface achieves a polarization conversion ratio (PCR) of above 0.99 from 3.7 GHz to 20.2 GHz with a relative bandwidth (RBW) of 138% and an AT parameter of over 0.9 from 5.8 GHz to 17 GHz with
an RBW of 99.5%. Moreover, the proposed metamaterial maintains high PCR and AT performance for a wide range of incident angles. Due to its excellent features, such as the wideband and high efficiency of both PCR and AT performances, the proposed bi-functional metasurface can be useful for promising applications such as polarization imaging. radar, radiometer, and transmission.
array antennas.

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