Dual-Bandwidth Linear Polarization Converter Based on Anisotropic Metasurface

Abstract

In this work, a metasurface with the symmetrical double C-shaped narrow ring connected with the central cross structure is investigated by simulation, theory and experiment, which can near-perfectly convert linearly polarized electromagnetic waves into their orthogonal components in the frequency ranges from 9.38 to 13.36 GHz and 14.84 to 20.36 GHz. And the corresponding fractional bandwidths within the two bands are 35.00% and 31.36%, respectively. The influences of structural parameters on the polarization conversion performance are studied. The results show that the central frequencies and bandwidths of the two bands can be easily modulated by varying the structural parameters of r and θ. The high-efficiency and dual-broadband characteristics can also be well maintained in the oblique incidence range of 0-45°. Meanwhile, the mechanisms of polarization conversion are analysed, and several formulas are used to calculate the reflection coefficients of the co-and cross-polarization under the normal incident y-polarized electromagnetic waves based on the phase difference of the reflection coefficients of the uand v-polarized conversions. The experiment results are in good agreement with those of simulations and theoretical analysis. The proposed metasurface has important applications in novel polarization control devices.

Cross polarization conversion metasurface for fixed wireless and ku‐band applications

“…The simulated and measured results shows that a LP incident EM wave can be reflected back from the surface with its orthogonal counterpart. The proposed PCMS has been compared with already reported dual band polarization converting metasurfaces, [34][35][36][37][38] in Table 1. To validate the simulated results, a prototype has been fabricated and tested.…”

Microwave Polarization Sensing for Dielectric Materials Based on a Twisted Dual-Layer Meta-Surface

“…For a y-polarized wave vertically incident on the meta-surface, the polarization state of the transmitted wave can be defined by elliptical angle (EA), and polarization rotation angle (PRA), , which can be calculated as follows [ 16 ]: where is the magnitude ratio of the co- and cross-polarization transmission coefficients, and , is the phase difference of them. Elliptical angle reflects the polarization state of transmitted wave, and ranges from to , where denotes a linearly polarized (LP) wave, and denotes a left-handed or right-handed circularly polarized wave.…”

Design of ultrathin transparent cross‐polarization converter

“…Gradually, researchers began to focus on simple single‐layer structures. Recently, symmetric split‐ring resonators (SRRs), elliptical metasurfaces, metasurfaces arranged in concentric rectangles, and graphene metamaterial polarization converters have been proposed 23–26 . However, the aforementioned polarization control surfaces are mainly composed of opaque materials such as opaque substrates and metal structures.…”

“…Recently, symmetric split-ring resonators (SRRs), elliptical metasurfaces, metasurfaces arranged in concentric rectangles, and graphene metamaterial polarization converters have been proposed. [23][24][25][26] However, the aforementioned polarization control surfaces are mainly composed of opaque materials such as opaque substrates and metal structures. The lack of optical transparency limits the possibility of their application in more new scenarios.…”