Design of Circularly Polarised Patch Antenna Using Polygonal Slot

Abstract

A novel single-feed (SF) circularly polarized (CP) micro strip antenna with polygonal slot on the radiating patch is designed. The proposed antenna is used to provide a small axial ratio over a relatively large frequency range and the CP quality is used for a wider range of radiation angle. The structure consists of a single layer with easy fabrication at low cost. HFSS tool used to verify the proposed structure in terms of gain, return loss and axial ratio measurements.