Linear-to-Circular Polarization Conversion Using Metasurface

Abstract

Reflection and transmission properties of a metafilm: With an application to a controllable surface composed of resonant particles, IEEE Trans Electromagn Compat 47 (2005), 853-865. 8. Fluid interactions with metafilms/metasurfaces for tuning, sensing, and microwave-assisted chemical processes, Phys Rev B 83 (2011), 205130. 9. E.S.R. Montalvão, Implementation of polarization converter linearcircular for microstrip antennas using metasurfaces (in Portuguese),ABSTRACT: A wideband bandpass filter based on dual-mode defected ground structure resonator (DGSR) is designed and effectively analysed by utilising the even-/odd-mode theory and equivalent circuit models. The lower and upper cutoff frequencies of the filter can be independently tuned by adjusing the even-and odd-mode resonant frequencies of the dual-mode DGSR, respectively. The fabricated prototype is centred at 2.27 GHz with a wide bandwidth (FBW 63.4%), low insertion loss (0.386 dB), high selectivity and wide stopband. The attenuation slopes in the lower and upper passband transitions are 108.5 and 136.9 dB/GHz, respectively. The stopband rejection is better than 22 dB up to 6 GHz (2.6 f 0 ).

Polarization-Reconfigurable Circularly Polarized Planar Antenna Using Switchable Polarizer

“…The helix antenna [6] and spiral antenna [7] are well-known examples of broadband CP antennas. Apart from the antennas mentioned above, CP antennas can also be achieved by using a polarizer to convert the LP wave to CP wave [8][9][10]. One main advantage of utilizing a polarizer is that it can enhance the gain of CP antenna without resorting to an array antenna which requires a complicated feed network.…”

“…In [8], using meander lines to design a polarizer consisting of four substrate layers was reported. In [9] and [10], metasurfaces were used to convert LP wave to CP wave. Compared to the conventional CP antenna array, using a polarizer to generate CP waves does not need a complex, lossy feed network.…”

A Dual-Band Low-Profile Metasurface-Enabled Wearable Antenna for Wlan Devices

“…In the past decades, researchers have engaged in planar metamaterials composed of subwavelength periodic resonant or non-resonant unit cells [13], which are also called as metasurfaces. Some important applications of metasurfaces are anomalous refraction or reflection [14], surface-wave conversion, and polarization transformation, and they have also led to a wide range of applications in the antenna and propagation fields [15]. Metasurfaces not only are used to improve the properties of antennas including bandwidth and gain, but also can eliminate the aforementioned drawbacks.…”

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

“…Based on the design of a metamaterial reflective surface presented in [15], analogous metasurface whose unit cell consists of a rectangular loop with a diagonal microstrip was placed close to a source antenna to convert the linearly polarized signal generated from the source into a circularly polarized one [16,17]. Broadband circular and linear polarization conversion has been reported by using thin birefringent reflective metasurfaces, which are composed of two orthogonal I-shaped structures placed on a substrate with a grounded sheet [18].…”

“…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.…”