Abstract: As the beam is too narrow in the application of the ultra-wideband (UWB) antenna with single-source, a novel wide-beam UWB paraboloidal antenna with dual-source has been designed. The novel paraboloid was improved from an original paraboliod, which was separated in the middle and the two parts were comected by a metallic plate. The improved planar TEM horn antenna is adopted as the source, and it is fed by the coaxial-cable vertically. The dual-source were put on the fouses of the paraboloid. The radiation properties of the proposed antenna are studied using the finite-difference time-domain (FDTD) numerical method. The radiation properties of the proposed antenna can be improved by changing the structure of the paraboloidal antenna and adjusting the angle between the source and the boresi