Hadi Baghali - Department of Electrical Engineering, Urmia Branch, Islamic Azad University, Urmia, Iran,
Yashar Zehforoosh - Department of Electrical Engineering, Urmia Branch, Islamic Azad University, Urmia, Iran,
Javad Nourinia - Department of Electrical Engineering, Urmia University, Urmia, Iran,

A ۲۵×۲۵×۱.۶mm۳ implementation of a microstrip-fedprinted monopole antenna for the future UWB wireless systemsapplication is presented. It has features of possesses bandnotched function (from ۴.۸۸ to ۶.۰۷GHz), extremely wideimpedance bandwidth (from ۲.۵۸ to ۱۸GHz) and its compactsize. By using a smooth tapering between the semi fractalshapedpatch and the half ellipse-shaped defected ground plane,the wide impedance bandwidth is achieved with ratio bandwidthlarger than ۶.۹۷:۱. Numerical and experimental results are ingood agreement and they indicate that the proposed antennahas a measured ۲:۱ VSWR bandwidth of ۱۴۹.۸%, except therejected WLAN band.

antenna , microstrip, band notched, radiation