Rectangular microstrip patch antenna with EBG structure

Abstract

This paper presents a rectangular microstrip patch antenna with EBG structure. The combination of the rectangular microstrip patch antenna fabricated on the top of the substrate Rogers RO3003 with Electromagnetic Band Gap (EBG) structures at the ground plane is proposed to investigate the metamaterial characteristics in antenna design for satellite application. The patch antenna along with the EBG structure is designed to resonate at 7.3 GHz. Simulations and measurements have been carried out to verify the performance of EBG structures in patch antenna. All the simulation and measurement work is done by using Computer Simulation Technology Microwave Studio (CST-MWS) and Vector Network Analyzer (VNA) respectively. Metamaterial characteristics which exhibit negative permittivity and permeability of the proposed EBG structures have been verified using Nicolson-Ross-Weir (NRW) method. As a result of combining the rectangular patch with EBG structure, the bandwidth of the antenna has been increased by 39.63% and the size of the antenna reduced by 22.38% compared to the antenna without EBG. The return loss also met the specification of -10 dB cut off.