This study introduces a novel patch antenna designed specifically for Ultra-Wide Band (UWB) applications. The designed antenna exhibits small size and compact geometry, measuring 20 mm x 21.5 mm, with a modified ground plane. To construct the antenna, FR4 material with a depth of 1.60 mm and a relative permittivity of 4.3 is employed. The antenna performance is evaluated using the Computer Simulation Tool (CST) Microwave Studio software, and various results are obtained. The antenna demonstrates operation from 3 GHz to 11.51 GHz and also from 13.45 GHz to 14.65 GHz, ensuring less than -10 dB return loss, less than 2 VSWR and a maximum gain of 4.97 dB. Additionally the antenna is fabricated and the simulated and the measured findings exhibit a strong level of agreement.