A novel technique to improve the relative narrow bandwidth of the conventional planar triangular monopole antenna (PTMA) is presented. With a ridged ground plane, a significant improvement on the impedance bandwidth up to about 4:1 can be achieved. The proposed antenna design is a modification from the conventional volcano smoke antenna (VSA) and can be more compact and easily fabricated. A printed PTMA is fabricated on the FR-4 PCB substrate. The HFSS 3-D EM solver is employed for design simulation. Measured VSWR of the printed PTMA with the ridged ground plane is less than 2 from 3 to 10 GHz which is close to cover UWB frequency band. The measured antenna patterns also show omni-directional radiation patterns over the desired frequency band.