A ultra wideband micro-strip patch antenna with capacitive feed is presented here. In recent years microstrip patch antennas are widely used in communication systems because of their characteristics such as low cost, low profile structure and minimal weight. Due to these characteristics, micro-strip antennas are capable of maintaining high performance over a wide spectrum of frequencies, also the size of the antenna is directly tied to the wavelength at the resonant frequency. One of the important aspects in__ampersandsignnbsp;micro-strip patch antenna is the feed applying to them. Since, the performance of the basic micro-strip patch antenna suffers from number of serious drawbacks; especially its narrow impedance bandwidth associated with probe-fed micro-strip antennas. Here, a capacitive feeding scheme is used which comprises of a radiator patch, air cavity in the substrate and a capacitively-fed in order to overcome the drawbacks associated with probe-fed. Slots are used in the radiating patch at the four sides to attain improved bandwidth. Different parameters like return loss, gain(both 2D __ampersandsignamp; 3D),VSWR, radiation patterns, E __ampersandsignamp; H fields, current distribution are simulated using Ansoft HFSS 13.0. This type of proposed patch can be used for various applications in Ku-band.