This paper presents the design of notched-band antenna with CPW - feed. The notched - band has been achieved by using the W-shape slot in ground plane. The antenna has been simulated using a 3D - Electromagnetic simulator. The experimental results of proposed antenna exhibit ultra wideband characteristics from 2.0-15.0 GHz except the notched-band frequency from 5.0-6.0 GHz. The slot is optimized with respect to width, length and position for a detailed study of notched-band characteristics. It is observed that the centre frequency and bandwidth of notched-band depend on the length and width of slot respectively. The experimental radiation patterns of this antenna are omnidirectional in H-plane and bidirectional in E-plane. This antenna can be useful for UWB system, medical imaging and vehicular radar. © 2012 SBMO/SBMag.