Size Reduction and Bandwidth Enhancement of Microstrip Patch Antenna by Proper Positioning of Patch above the Defected Ground Plane

Abstract: article, a single layer reduced size broadband microstrip antenna with properly positioned In this patch placed above defected ground plane has been successfully implemented. The size of the antenna is reduced with large enhancement in bandwidth by defecting the ground plane and proper positioning of the patch with respect to the defected ground plane. With theproposed design, a maximum size reduction of 75% in the antenna is obtained with respect to the conventional microstrip patch antenna on an infinite ground plane. The measuredresult shows -10dB return loss bandwidth of about 3.02 GHz (2.85-5.87GHz) and 1.4 GHz(7.10-8.5GHz) which are 69% and 18% respectively around their center frequencies. The overall dimensions of the proposed antenna (24x20x1.5875mm3) can be easily applied for WLAN, HiPERLAN, HisWaNa and WiMAX applications

Keywords: Bandwidth Enhancement, Defected Ground Plane, Microstrip Patch Antenna, Size Reduction, Wireless Communication