Design of T-Slot Loaded Circular Microstrip Patch Antenna to improved dual bandwidth

Abstract

In this paper, a T-slot loaded circular disk microstrip patch antenna was designed using HFSS Microwave Studio at a resonant dual frequency of 4.37 GHz and 5.19 GHz. The antenna parameters are calculated such as a dual bandwidth was obtains as 105.8 and 137.6 MHz compared with 73.7 MHz for CMSA , return loss, VSWR values are 1.08 and 1.138 for corresponding two resonant frequencies and calculated 2D and 3D radiation pattern and a good agreement was obtained for this antenna after approximate the dimensions of the T-slot to zero.