A novel plane integrated ultra-wide band（UWB）antenna used as the radiation andreception of the short pulse is developed. A new UWB feed structure of the coplanar waveguide toslot line is invented and used in slot antenna initially. The experimetal results show the advantageof high fidelity of the waveform

high radiating efficiency

and high antenna gain compared withsome common wide band antennas such as biconical antennas

V-conical antennas

and some otherTEM horns.