A Dual-Wideband Polarization-Insensitive Linear Polarization Converter Based on Metasurface

Abstract

A linear-to-linear cross-polarization converter (CPC) based on metasurface (MS) is proposed. The converter is polarization insensitive and has two wide bands. The MS is composed of periodical unit cells printed on a substrate. The top and bottom MS unit cells are formed with four groups of right-angle triangle pairs whose vertices are connected. Thus, there are eight pairs of triangles on the top and bottom surfaces of the substrate, and these pairs of triangles are arranged alternately in overlapping and orthogonal ways. The polarization conversion ratio (PCR) of the CPC is higher than 95% in the bands of 9.4 to 13.1 GHz and 13.4 to 17.2 GHz. Additionally, the PCR remains the same when the electromagnetic (EM) wave is incident at arbitrary azimuth. Furthermore, the polarization rotation angle and elliptic angle are calculated to verify the conversion effect. Finally, the conversion mechanism of the proposed converter is explored by analyzing the surface current distribution and magnetic field. The proposed converter can be applied to the field of satellite communication in Ku-band.

Broadband and High-efficiency Reflective Linear Polarizer

“…The results demonstrate that our MS outperforms other designs in terms of its ability to manipulate and control polarization. In [27], the MS achieves a high PCR of up to 0.95 and a thickness of only 0.762 mm in two frequency bands, but its period is up to 23 mm, making it challenging to integrate. The study only analyzes its performance under normal incidence without considering oblique incidence.…”

Switchable Active Metasurface for Dual Band Gain Enhancement

“…Metasurfaces are formed by planar metamaterial unit cell arrays which can alter electromagnetic waves. Conventional metasurfaces are used in a variety of applications [1][2][3][4][5]. Nonperiodic metasurfaces are used in the design of broad band antennas [1].…”

“…Side lobe suppression is achieved in metalens antennas using amplitude and phase controllable metasurfaces [4]. A metasurface based linear to linear cross polarisation convertor is used in the 'ku' band [5]. High gain is achieved in Terahertz antennas using multilayer metasurface [6].…”