Comparative and analysis of various geometries with defective ground structured hexagonal patch antenna

The aim of this work is to design a hexagonal microstrip antenna which operates for S-band i.e., 2-4GHz and is applied to wireless applications. The proposed antenna is composed of a poly tetra fluoro ethylene substrate material, hexagonal patch and a ground plane on which six triangular slots are etched just below the six corners of the hexagonal patch called as defective ground surface. This structure has two operating frequencies 2.9GHz and 3.2GHz which results with a minimum return loss of around -22.23dB at 2.9GHz and-31.65dB at 3.2GHz also good gain of about 7.39dB at 3.2GHz is obtained. It shows that hexagonal patch has better results compared with various patch geometries such as square, rectangle, circle etc.,. The design of hexagonal patch with DGS is analyzed using method of moment in CADFEKO. Finally few parameters of various geometries are compared.