A novel printed ultra-wideband (UWB) Y-shaped antenna is presented in this article. Unlike the conventional Y-shaped antennas, the proposed antenna had a half of stacked Y-shaped antenna dipole that was printed on each side of a microwave substrate respectively. The proposed antenna, which was fed by a 50Ω microstrip line, generates the desired ultra-wideband operation. Prototype designed for UWB operations in 3.1~10.6 GHz had been constructed and tested. The experimental results also indicate that reasonable gains through the entire operating band were observed.