Square Microstrip Patch Antenna For Wireless Communication Using EBG Structure.

Abstract

Application of Electromagnetic Band Gap (EBG) structures and their utilization in the design of microstrip antenna and embedded microwave circuits is becoming more popular. The integration of EBG structure method is capturing more importance in antenna design because of its uniqueness characteristics to prevent the propagation of surface waves in  patch antenna. In this paper a square microstrip antenna is designed and its performance parameters are compared with having EBG structure.  The square antenna of 29 mm x29 mm  size is designed at 2.455 GHz ad analysis is done using IE3D  simulation software. The proposed work mainly focuses on modification of antenna electronic band gap structure (EBG). The antenna performance parameters such as Gain , VSWR, Return loss  and Bandwidth, with and without EBG are measured using IE3D simulation tool. The present work focuses on to improve gain and bandwidth so that microstrip patch  can used for multi band applications and study effect of EBG on antenna parameters. The Electromagnetic band-gap structures have been used to enhance the performance of the gain of the antennas and antenna radiation pattern [1]. One of the main benefit of electromagnetic band-gap structure is its ability to minimize the surface wave current present in the microstrip antenna. Combining the square microstrip antenna  with EBG structure, the frequency bandwidth of the patch antenna has been enhanced by 34.66%, and attained  gain of 44.44%  at resonant frequency around 2.4 GHz as compared to the microstrip antenna without EBG. The required return loss S11 also attained at -10 dB cut off.