A metasurface-based polarization converter designed for different band applications, with circular and linear polarization properties

In this study, design and simulation processes of a simple structure polarization converter preferred for different band applications were carried out. FR-4 material was selected for the middle part and copper material was preferred for the top and bottom (ground). FR-4 material has been selected for the polarization converter (PC). For this material, loss tangent is 0.025, dielectric constant is 4.3 and thickness is 1.6 mm. The simulation of the study was performed using a Computer Simulation Technique (CST) studio suite. Frequency range selected for this study is 4–16 GHz. The simulation was carried out taking into account the frequency-domain solver. Tetrahedral was selected as the mesh type. The aim of the proposed study is to implement a design with different polarization properties. Polarization conversion ratio (PCR) value for PC was found to be greater than 0.9, and it exhibited magnetic properties at all three frequencies where the PCR value was greater than 0.9. PCR value reached 0.99 in the X-band range. PC, which exhibits circular polarization in the C-band frequency range, was observed to have a 90 degree phase shift. Matlab program was preferred in evaluating the CST simulation results and interpreting the reflection coefficient, PCR, ellipticity (e) value, axial ratio (AR) and phase values.