Design and Analysis of Slotted Microstrip Patch Antenna using High Frequency Structure Simulator (HFSS)

Abstract

Microstrip patch antennas are mostly recognized for their flexibility in terms of possible geometries that make them applicable for many different situations. The light weight construction and suitability for integration with microwave integrated circuits are two further advantages. Typically, patch antennas have low directivity. This limits their range of propagation. Therefore, directivity enhancement is an important issue in the design of patch antennas. This paper presents a rectangular microstrip patch antenna operating at 5GHz that has slots cut over the patch to enhance the directivity. The antenna is assumed to be a cavity resonator operating in the Transverse Magnetic (TM33) mode. Moreover, a few slots are cut over the patch and these slots behave like tiny aperture antennas, which increase the directivity. HFSS is utilized for simulation of the antennas. These antennas are directional antennas and their applications can be found in automobiles, aircraft and spacecraft etc.