Ultra-wideband polarization conversion metasurfaces based on multiple plasmon resonances

Abstract

We propose to realize ultra-wideband polarization conversion metasurfaces in microwave regime through multiple plasmon resonances. An ultra-wideband polarization conversion metasurface is designed using a double-head arrow structure and is further demonstrated both numerically and experimentally. Four plasmon resonances are generated by electric and magnetic resonances, which lead to bandwidth expansion of cross-polarization reflection. The simulated results show that the maximum conversion efficiency is nearly 100% at the four plasmon resonance frequencies and a 1:4 3 dB bandwidth can be achieved for both normally incident x- and y-polarized waves. Experimental results agree well with simulation ones.

Erratum for: Design of double ring hybrid using intentionally mismatching method

“…As is shown, the structure do not have strong microwave absorption effect and should not be considered as an absorber. For other incident angle, the conclusion is similar.The surface currents shown in Figures 6 and 7 from [1] are similar to the previous work which performance as a cross polarization convertor [2]. The explanation in section 4 of [1] should be the mechanism of the polarization conversion rather than the mechanism of absorption.…”

A Circularly-Polarized Metasurfaced Dipole Antenna With Wide Axial-Ratio Beamwidth and RCS Reduction Functions

“…With respect to the principle of polarization conversion, Ref. [5] gives a detailed theoretical analysis. In our case, we take advantage of the metasurface to realize polarization conversion of the reflected wave, accordingly the reflected wave and the directed wave emitted from the dipole antenna will generate two orthogonal polarization waves.…”

“…Metasurface, a two-dimensional equivalent of metamaterial, has been attracting attention of researchers in the past few years. Due to its unique properties, metasurface has strong capability of manipulating electromagnetic waves, such as polarization conversion [5,6], polarization rotation [7,8] and wave redirection. Moreover, traditional antennas combined with metasurfaces, which can be referred to as metasurfaced antennas, can constitute new types of antenna with superior performance in return loss, polarization mode, radiation efficiency, gain value, low RCS, etc..…”

“…In this paper, we intend to utilize the metasurface proposed in [5], which was in fact the shear deformation of that used in [10,[15][16][17], to design a circularly polarized antenna and mainly focus on the wide AR beamwidth and RCS reduction performances. In order to make the designed antenna work in C-band for satellite communications, the geometrical parameters of the metasurface used in [5] are redesigned.…”

“…In order to make the designed antenna work in C-band for satellite communications, the geometrical parameters of the metasurface used in [5] are redesigned. Then a simple dipole antenna is selected as the source and placed above the metasurface as shown in Figs.…”