Rectangular Patch with Optimized Circular Slot and Perturbed Rings for Multiband Application

Abstract

This artefact provides a novel design, which includes a rectangular patch having an optimized circular slot. The patch is supported by modified rings to enhance the antenna gain. The unique patch structure is designed using HFSS software on a substrate of dimension 70 mm × 70 mm × 1.6 mm. The ground plane has the same dimension as that of substrate but only differs in height. Height of ground plane is 0.01 mm. The optimization has been done for the circular slot in HFSS by using the Optimetrics tool. The perturbed rings having a width of 2 mm act as the supporting element for enhancement of antenna gain. The proposed antenna is designed with a simple line feed of 3 mm width. Parameters like S-Parameter (<10 dB), surface current distribution, standing wave ratio, antenna gain and directivity are determined from the simulation at the optimized value of the circular slot. The antenna is designed for multiband application in the frequency range from 1 to 6 GHz, which also includes the 5.9 GHz WLAN application.