A novel directive Ultra Wideband Vertical Quarter Elliptical (VQE) Sheet Antenna design

Abstract

In this paper, a novel design for a directive ultra wide band antenna has been proposed. It has been aptly named `Vertical Quarter Elliptical (VQE) Sheet Antenna' because of its shape. Its simulated return loss, VSWR, input impedance and radiation pattern are discussed. This antenna has a voltage standing wave ratio that is less than 2 (VSWR<; 2) and the return loss (S11) is less than -10 dB along the operational bandwidth of 2.4 GHz to 12.8 GHz. This means an operational bandwidth of about 137%. This tremendous increase is also brought about by an asymmetry in the feed position, the trade off being a slightly degraded radiation pattern. The radiation pattern of the antenna is of the type `end fire' which is made directional using a reflector. The simulated radiation pattern after adding a reflector has also been shown.