A Novel Maple-Leaf Shaped UWB Antenna with a 5.0-6.0 GHz Band-Notch Characteristic

A novel microstrip fed ultra-wideband (UWB) antenna with difierent band rejection techniques is presented in this paper. The antenna consists of a maple-leaf shaped radiator fed by a microstrip line with a flnite ground plane on the other side of the substrate. The size of the UWB antenna is 30:5£35:5mm 2 which is only about 0:3£0:35‚ 2 at 3GHz. The calculated impedance bandwidth of the proposed antenna ranges from 3GHz to 14GHz with relatively stable radiation patterns. Two difierent techniques have been implemented to achieve band-notch characteristic in the 5.0{6.0GHz WLAN frequency band. The flrst one uses an H-shaped slot cut away from the radiating patch while the other one uses two rectangular slits in the ground plane creating defected ground structure (DGS).