Abstract: A compact rectangular microstrip patch antenna with minimum return loss having enhanced gain and bandwidth is proposed in this paper. The antenna is analysed for the different height of the dielectric substrate. The resonant frequency of the designed antenna is 2.4 GHz. The dielectric substrate used for antenna designed is FR4-epoxy having a dielectric constant of 4.4. The designed antenna has a bandwidth which covers the frequency band of WLAN applications. It is observed that the gain of the designed antenna using more height substrate is greater than the normal substrate height. The return loss is also greater than the conventional patch antenna. Microstrip line feeding method is used to energize the antenna. VSWR for the designed antenna is less than 2. A comparative analysis of the different characteristics of the antenna such as gain, bandwidth, return loss, directivity and VSWR is carried out using different height substrate .Software High Frequency Structure Simulator (HFSS) is used for the simulation of the designed antenna.

Keywords: VSWR, Microstrip antenna, Bandwidth, High Frequency structure simulator.