Abstract: A compact dual band-notch ultra-wideband antenna with two parasitic single sides is presented in this paper. Theproposed antenna yields an impedance bandwidths of 2.8-12GHz with VSWR<2, except for the bandwidths of 3.3-3.9GHz forWiMAX and 5-6GHz for WLAN. In order to achieve band-notch characteristic, two single sides are loaded in the microstrip-fed. It isnecessary to control the notched bandwidths and locations to obtain an efficient and notched UWB antenna. Therefore, the notchedbandwidths via the lengths and widths of the single sides are studied. The antenna has been successfully designed, simulated andmeasured, showing good impedance matching, stable gain and radiation patterns. The proposed antenna is simple and easy tomachining .The influences of different parameters are studied in this paper.