A wideband antenna with fan-shaped and trapezoidal elements for Ultra Wideband radio

In recent years, wireless communications using Ultra Wideband (UWB) technology are promising in order to materialize the ubiquitous world what is called [1]. Antennas for UWB communications, using a frequency range of 3.1 GHz to 10.6 GHz, require suitable broadband characteristics as compared with antennas for conventional wireless communications.