Bandwidth enhancement of microstrip patch antenna using parasitic patch

Abstract

Microstrip patch antenna finds a better choice in wireless communications because of their less cost, light weight and ease of fabrication. This paper proposes a novel design for the bandwidth enhancement of microstrip patch antenna with parasitic patch placed adjacent to the radiating patch along with the slots. The proposed structure is designed at 8.5 GHz using FR4-epoxy as substrate material that has relative permittivity 4.4 and loss tangent 0.02. HFSS (High Frequency Structure Simulator) software is used for simulating the proposed design. This antenna obtained the return loss -41.4.30 dB, gain 5.3542 dB, directivity 5.4612 dB and VSWR 1.0172. Comparative analysis with various slots on both main patch and parasitic patch has been done for various antenna parameters like; return loss, gain, directivity and VSWR. The results clearly explain that the proposed design has favourable characteristics suitable for X-band applications.