In this paper, the authors present an Ultra Wide Band (UWB) which is simplified and compacted on a rectangular micro strip patch. The micro strip patch of rectangular shape has been narrowed at the bottom and the ground plane in cut-shorted at the top center. The substrate is FR4 substrate with the dimension of 28x29x1.6mm and permittivity of 4.4. The antenna has been designed on HFSS v11.0 software simulation tool. The simulated results are shown in this paper.