Design and Characterization of Microstrip Patch Antenna Using Octagonal EBG Periodic Structures

Abstract

This article divulges regarding the design and characterization of an antenna together with electromagnetic periodic bandgap structures for C-band applications. These periodic structures include the materials to setup different innovative structures that usually finds in many applications for industry and military purpose. Normally substrate with metallic patches are associated along  these structures that acquires dimensions usually less than that of its operating wave length (λ) when compared to normal  design of micro strip antenna found enhancement in efficiency and bandwidth for the structure approximated upon placing it on modified ground surface. For a certain encountered external conditions basically there is less deliberation on optimized design and also on its performance, but maximum literatures concentrate specially on computational aspects of EBG (Electromagnetic Band Gap) structures. The basic design encountered in the paper is associated with a set of octagonal slots within the substrate confined with both ground plane and patch. The dimensions of parameters for designing the antenna model is obtained by the concept of optimization using HFSS (High Frequency Structure Simulator) tool that can resonate at desired frequency. A better return loss of  -21.09dB is recorded with this structure when compared with normal conventional patch antenna. The proposed design is resonating at 6.9 GHZ.