Abstract
In this study, a microstrip line-fed printed planar monopole antenna for ultra-wideband applications is presented. The proposed antenna is composed of an annular ring fed by a microstrip line and a partial ground plane. It occupies 39 x 40 x 1.6 mm(3) on the FR4 substrate material. The measured impedance bandwidth of the realized antenna is from 2.6 to 12.3 GHz (4.7:1, 129.35 %) for VSWR a parts per thousand currency sign 2. It has an average gain of 3.67 dBi with a maximum gain of 5.52 dBi. Moreover, the antenna exhibits stable omnidirectional radiation patterns within the operating band. Details of the proposed antenna design are presented and discussed.