Optimization of the dimension of circular slotted rectangular Microstrip antenna for wide band wireless applications

A stupendous growth in the area of Information technology is the spread of wireless wide band applications. The versatility of Microstrip patch antennas added new dimension to it. It's light weight and suitability for integration with microwave integrated circuits along with the simplicity of the structures marks it well suitable for low-cost manufacturing. All these accounts for the wide spread use of microstrip patch antennas in various wireless communication applications. In this paper a wide band rectangular shaped single-patch microstrip patch antenna with circular slot is proposed. Circular shaped slot over the rectangular patch is combined together to expand the bandwidth of the antenna. A compact size of 19 mm by 23 mm with duroid material is chosen for design. Optimization using HFSS simulation software is applied to optimize the structure of the antenna. The effect of circular slot is compared without the slot structure. It is observed that the bandwidth expands up to 0.7 GHz with a uniform radiation pattern.