A compact UWB antenna with tripleband notched feature is designed in this paper. The antenna consists of a rectangular radiating patch with a half circle at bottom, a tapered microstrip feedline, and a semielliptical ground plane. With a symmetrical Lshaped slots and circular grooves etched on the radiating elements, the bandnotched characteristics of WLAN/WiMAX are created.The experimental results show that the voltage standing wave ratio (VSWR) of the designed antenna is less than 2 at the operating band from 2.68 GHz to 13 GHz;meanwhile,the notch suppression is realized at the operating band from 3.1 GHz to 3.8 GHz, 5 to 5.9 GHz, 7.25 to 7.85 GHz and good radiation patterns within the operating band have been observed. The antenna has compact size of only 20 mm×30 mm.