A Novel Microstrip Patch Antenna using Square Shaped Ground Defects for WiMAX/WLAN Applications

Vol. 4  Issue 2
Year: 2015
Issue:Feb-Apr
Title:A Novel Microstrip Patch Antenna using Square Shaped Ground Defects for WiMAX/WLAN Applications
Author Name:Jashan Preet Singh and Ankush Kansal
Synopsis:

A compact microstrip patch antenna with defected ground structure for WiMAX and WLAN applications is proposed in  this paper. The substrate used for this antenna is ROGER 3003 with dimensions 36 x 24mm2 . The front side of the antenna consists of the square shape strip enclosing a U shape strip, which is connected to the square through a small strip. The ground i.e. on the back side of the substrate, having curved shape, three square shaped polygons are etched through, that will provide the defected ground plane. The main outer square is fed by a microstrip feed line having 50Ω impedance. The defected ground structure will provide better impedance matching. This proposed antenna has large bandwidth (0.33 GHz (2.20-2.53 GHz), 1.15 GHz (3.09-4.24 GHz) and 0.86 GHz (5.03-5.89 GHz)), high gain (2.81 dBi (2.20- 2.53 GHz), 2.65 dBi (3.09-4.24 GHz) and 4.38 dBi (5.03-5.89 GHz)) and good antenna total efficiency.