This document describes the design of a compact planar monopole ultra-wideband antenna with dual band-notch characteristics. The antenna is printed on an FR4 substrate and achieves an ultra-wide bandwidth from 2.85 GHz to 5 GHz through the use of a U-shaped patch with circular curves. Band-notches are created at 3.3-3.7 GHz and 4.9-6 GHz using a rectangular strip and M-shaped parasitic element. Simulation results show good impedance matching across the UWB range except at the dual notched bands, with omnidirectional radiation patterns and a peak gain of 5.6 dBi.