A microstrip elliptical patch antenna was designed on liquid crystal polymer substrate for ultra wide band wireless communications. The proposed ultra wide band antenna simply consist of an elliptical patch with coaxial feeding and liquid crystal polymer substrate of 3.16 permittivity and 0.004 dielectric loss tangent placed on the ground plane. At operating frequencies of 4.5, 6, 8 GHz, the proposed UWB elliptical patch antenna was simulated which covers the range of UWB (3.1 to 10.6 GHZ). This study includes the presentation of return loss, input impedance, 3D-gain, 2D-gain, radiation patterns, E-field, H-field distributions and current distribution.