Optimized design of H-slot antenna for bandwidth improvement

A wide band optimized H-slot microstrip antenna is described in this paper. The radiating patch is mounted upon a dielectric substrate and the antenna is excited by a microstrip line feed. The antenna dimensions and the radiation parameters such as return loss, VSWR, gain and directivity are studied using Ansoft HFSS. Particle Swarm Optimization (PSO) which is an effective evolutionary optimization technique is used for optimizing the proposed antenna. This method provided better results in the design of the antenna and it also analyzed the effect of the various design parameters like substrate length and height, length of the patch and feed. The improvement in the results has been included in the design. Therefore, with the modified parameters, the antenna exhibits 50% increase in bandwidth which is shown in the results section.