Using Inverted T-Shaped Slot for Current Modification in Printed Ultrawideband Antenna

Abstract

A printed monopole antenna with novel design is proposed. The antenna is designed to achieve an ultrawideband an omnidirectional
performance. The antenna is constructed using a rectangular shaped radiator with an embedded inverted T-shaped slot located near the feed
point. The ground plane is formed from half an ellipse with an embedded truncated circular slot located near the lower edge of the radiator. For
an improved impedance matching, the radiator includes two notches at its lower corners. The effect of the design parameters of the antenna on
its impedance bandwidth is explained. The simulated and measured performance of the antenna shows a band from 2.5 to 11.2 GHz with an
omnidirectional radiation pattern.