Optimization of Axial Ratio Characteristics of Circularly Polarized MACKEY

Abstract

This research aimed to convert linear convectional polarization to circular polarization using an unbalanced the metasurface-inspired antenna chip developed by the KIT EOE Laboratory (MACKEY). Moreover, we aimed to achieve a Voltage Standing Wave Ratio (VSWR) of less than three and axial ratio of less than 3 dB in free space and on metal at 2.4-2.5 GHz. For this purpose, we proposed a circularly polarized MACKEY C4 antenna with four grid plates. We achieved our goal by examining the slit width and antenna position.