Improvement of bandwidth in printed monopole antenna by modified ground structures

This, paper has been investigated the Printed Monopole Antenna for the ultrawideband wireless communication system. The effects of defected ground structure are presented on the basis of simulations performed in IE3D for improvement in impedance bandwidth of proposed antenna. A significant improvement in the impedance bandwidth of the printed monopole antenna has occurred because of a small rectangular slot behind a microstrip feed line in the modified ground structure of the proposed antenna. An antenna has a square shaped radiator patch. The simulation result shows that an impedance bandwidth has improved by 138.93% i.e. 9.1 GHz (from 1.69 GHz to 10.79 GHz) can be achieved having VSWR · 2.