Ultra-wideband and broad-angle linear polarization conversion metasurface

Abstract

In this work, a metasurface acting as a linear polarization rotator, that can efficiently convert linearly polarized electromagnetic waves to cross polarized waves within an ultra wide frequency band and with a broad incident angle, is proposed. Based on the electric and magnetic resonant features of the unit cell, composed by a double-head arrow, a cut-wire, and two short V-shaped wire structures, three resonances, which lead to the bandwidth expansion of cross-polarization reflections, are generated. The simulation results show that an average polarization conversion ratio of 90% from 17.3 GHz to 42.2 GHz can be achieved. Furthermore, the designed metasurface exhibits polarization insensitivity within a broad incident angle, from 0 to 50. The experiments conducted on the fabricated metasurface are in good agreement with the simulations. The proposed metasurface can find potential applications in reflector antennas, imaging systems, and remote sensors operating at microwave frequencies. Published by AIP Publishing.

An efficient reflective polarization rotation meta surface for broadband RCS reduction

“…When the incident electromagnetic (EM) wave with a specific polarization impinges on the periodic reflective PRMS, multiple reflections and transmissions occur between the air and PRMS interface. The overall reflection produced, generates both x and y polarized EM waves . To understand the working of proposed reflective PRMS, the incident EM wave is considered to be y polarized.…”

“…The simulated and measured RCS of the proposed reflective PRMS checkerboard structure under y_ polarized incident EM wave is shown in Figure . Table provides a comparison between the proposed reflective PRMS checkerboard and other RCS structures . The proposed checkerboard structure provides a maximum PCR greater than 99% for a polarization bandwidth of 97.69% with a low profile structure.…”

“…Table 2 provides a comparison between the proposed reflective PRMS checkerboard and other RCS structures. 20,31,34 The proposed checkerboard structure provides a maximum PCR greater than 99% for a polarization bandwidth of 97.69% with a low profile structure.…”

Efficient broadband linear polarization conversion metasurface based on %‐shape

“…It excites the dipolar oscillation in the %‐shape array. In the multireflection, the consequent interference of the polarization couplings enhances its polarization conversion efficiency . Both numerical simulations and measured results show that the planar MMs‐based structure is capable of rotating a normal incidence of linearly polarized wave into its orthogonal one from 8.85 GHz to 18.85 GHz, within the operating frequency range the mean polarization conversion ratio (PCR) is greater than 0.95, achieving nearly 1 at the three resonant frequencies.…”

A coding optimized polarization conversion metasurface in broadband and wide‐angle

“…Most of early designs are narrowband. To expand the bandwidth of polarization conversion matasurfaces, various structures have been adopted, such as I‐ and V‐shaped structures . Through parameter optimization, these structures can cause a steady phase difference between two orthogonal linear polarizations in a wide band.…”