Microstrip patch antennas are well suited for low volume profile, light weight and easily integration. These antennas are generally useful for mobile communications, wireless communications applications which requires very wide bandwidth. This paper presents a three layered rectangular microstrip patch antenna with parasitic patches and a single probe feeding to the lower patch. The ultra wide band utilizes the frequency band 3.1-10.6 GhZ. Here, the proposed antenna is simulated by soft designer and The bandwidth of the antenna is 2.8 GHz and the % Bandwidth 50 % is achieved.