%T A Novel Ultra-Wideband Frequency Planar Notch-filter Antenna. %I Wiley-Blackwell %N 1 %D 2010 %A Carlos Gómez Calero %A Bazil Taha Ahmed %A Ramón Martínez Rodríguez-Osorio %L upm8354 %R 10.1002/mop.24845 %X Many research works have emerged for ultra-wideband (UWB) systems. One important issue is the antenna design to cover all frequency bands (3.1–10.6 GHz). In most applications, a reduced compact antenna is needed but with several requirements. In this paper, a novel triangle–semicircular planar monopole UWB antenna is presented with a notch filter to avoid the undesirable interferences in ISM (Industrial, Scientific and Medical) band at 5.3 GHz. %P 213-216 %K ultra-wideband;planar antenna;notch filter %V 52 %J Microwave and Optical Technology Letters