Ultra-Wideband Performance of Printed Hexagonal Wide-Slot Antenna with Dual Band-Notched Characteristics

In this paper, ultra-wideband characteristics of a hexagonal wide slot antenna with dual band-notched property have been proposed and experimentally investigated. By etching a pair of L-shaped slots and embedding a pair of parallel strip conductors, dual band-notched properties in WiMAX/C-Band satellite application and WLAN band are achieved respectively. Good impedance matching is obtained over a wide band by designing the feed structure with a 50› microstripline loaded by a tuning stub. The stub is proposed to have one hexagonal section and one straight section. The proposed antenna operates over 2.0GHz{10.7GHz range, for VSWR • 2, excluding the two rejection bands from 3.4GHz to 4.3GHz and 5.12GHz to 6.4GHz having rejection level VSWR of 7.84 and 6.5 respectively. The impedance bandwidth of the antenna is 5.35 : 1. The proposed ultra- wideband structure also exhibits constant group delay, satisfactory gain and high radiation e-ciency in the pass band.