An antenna is a transducer designed to transmit or receive electromagnetic waves. A 3-sided truncated microstrip patch antenna for Ultra-Wide Band (UWB) applications has been presented in this paper. The proposed antenna is compact in size and design on FR4 substrate. In order to validate the antenna performance, simulated results have been reported using HFSS EM solver. The proposed antenna is feasible for Wireless Local Area Network (WLAN), WiMAX, Wi-Fi and other various wireless applications.