Design of a wide band metasurface as a linear to circular polarization converter

Author:

Altintas Olcay1,Unal Emin1,Akgol Oguzhan1,Karaaslan Muharrem1,Karadag Faruk2,Sabah Cumali34ORCID

Affiliation:

1. Department of Electrical and Electronics Engineering, Iskenderun Technical University, Iskenderun, Hatay 31200, Turkey

2. Department of Physics, Cukurova University, Saricam, Adana 01330, Turkey

3. Department of Electrical and Electronics Engineering, Middle East Technical University-Northern Cyprus Campus (METU-NCC), Kalkanli, Guzelyurt, TRNC/Mersin 10, Turkey

4. Kalkanli Technology Valley (KALTEV), Middle East Technical University-Northern Cyprus Campus (METU-NCC), Kalkanli, Guzelyurt, TRNC/Mersin 10, Turkey

Abstract

In this paper, we present a wide band metasurface (MS) polarization converter which converts a linearly polarized signal to a right-handed or left-handed circularly polarized signal both numerically and experimentally. The unit cell of MS has three nested rectangular resonators which have two metallic patches at its crossed corners. The simulated and measured results are achieved by a commercial full wave EM simulator and a vector network analyzer with two horn antennas in microwave frequency regime. The S-parameters are obtained for co-polarized and cross-polarized responses and axial ratio is evaluated by the division of these two responses. The axial ratio is kept below 3 dB for efficient polarization converting activity. Correspondingly, axial ratio bandwidth of 800 MHz is obtained. The proposed MS can easily be fabricated and integrated into many desired applications by proper configurations depending on the application area and frequencies. The proposed MS has potential such as polarization converter with 0.75 efficiency in WiMAX frequency band, PMC-like treatment with a phase reflection around 0[Formula: see text] and reflection coefficient nearly unity at some frequency points. Beside this, the three nested rectangle MSs also provide opportunities to design low profile antennas with conversion characteristics.

Funder

TUBITAK

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

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