Bandwidth enhancement of microstrip patch antenna using defected ground structure

This paper presents a Bandwidth enhancement of Rectangular microstrip patch antenna (RMPA) using defected ground structure (DGS). A simple RMPA is designed which works at 2.4 GHz frequency. This antenna is considered as reference antenna. This antenna has bandwidth of 67 MHz. In this RMPA DGS technique is integrated. U shape DGS is inserted in a simple RMPA. Due to DGS, Bandwidth is improved compared to earlier antenna. Later this U shape DGS is modified to E shape DGS. Later this E shape DGS is modified to Double E shape DGS and finally into Psi shape DGS. The bandwidth of simple RMPA was 67 MHz which got improved to 302 MHz at 2.4 GHz frequency of with Psi shape DGS. The bandwidth received is suitable for different applications of WLAN. Ansoft HFSS software is used for simulation of the designed structure.