The document presents a new ultra-wideband antenna design with improvements over a previous prototype. The new antenna is smaller in size and uses a Teflon substrate. It achieves return losses between -10 to -15 dB from 3.1 to more than 10.6 GHz, with gains above 4 dBi across the band. Radiation patterns are omnidirectional over the entire UWB range. The new antenna design satisfies requirements for UWB systems and is suitable for wireless devices due to its thin, small size and stable performance across the wide frequency band.