Abstract-A compact microstrip notched ultrawideband patch antenna (UWB) with inverted E-and F-shaped slots is presented. By introducing a new inverted E-shaped notch in the radiating plane, band-notch about 2.68 to 3.55 GHz is achieved. A new type of Defected Ground Structure (DGS) in the ground plane is employed to extend the lower limit of the bandwidth so as to cover ISM 2.4 GHz WLAN-frequency band. The proposed antenna offers 126% bandwidth overall dimension of 13× 17× 1.6 mm 3 . The experiment results indicate that the proposed antenna can meet the requirement for UWB communication with size miniaturization.