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Linear to left- and right-hand circular polarization conversion by using a metasurface structure

Published online by Cambridge University Press:  10 November 2017

Oguzhan Akgol ,
Olcay Altintas ,
Emin Unal ,
Muharrem Karaaslan  and
Faruk Karadag
Oguzhan Akgol
Affiliation:
Department of Electrical and Electronics Engineering, Iskenderun Technical University, Hatay 31200, Turkey
Olcay Altintas*
Affiliation:
Department of Electrical and Electronics Engineering, Iskenderun Technical University, Hatay 31200, Turkey
Emin Unal
Affiliation:
Department of Electrical and Electronics Engineering, Iskenderun Technical University, Hatay 31200, Turkey
Muharrem Karaaslan
Affiliation:
Department of Electrical and Electronics Engineering, Iskenderun Technical University, Hatay 31200, Turkey
Faruk Karadag
Affiliation:
Department of Physics, Cukurova University, Saricam, Adana 01330, Turkey
*
Corresponding author: O. Altintas Email: [email protected]
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Abstract

By using a metasurface (MS) structure, a linearly polarized wave is converted to circularly polarized waves. Both right- and left-handed circular polarizations (RHCPs and LHCP) are obtained by a simple configuration in the proposed structure which consists of 16 unit cells arranged in a 4 × 4 layout. Each unit cell contains five horizontal and parallel strips embedded in a rectangular frame in which a single diagonal strip is placed from one corner to the opposed one. It is shown that the orientation of the diagonal line determines the handedness of the converted signal to be either LHCP or RHCP. In order to show the working conditions of the MS structure, scattering parameters are found for both co-polarized and cross-polarized responses. Axial ratio, an indicator for polarization conversion, is then obtained by dividing cross-polar response to co-polar response to demonstrate the transformation. The structure works for horizontally and vertically polarized linear waves in a wide band frequency range which is approximately 510 MHz. Since the suggested MS model is composed of a simple geometry for polarization conversion, it can be easily adjusted in any desired frequency bands for a variety of applications from the defence industry to medical, education, or communication areas.

Keywords

Antenna designmodeling and measurementsMeta-materials and photonic bandgap structures
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 10 , Special Issue 1: Journee Nationale des Micro-ondes 2017 , February 2018 , pp. 133 - 138
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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