Research and development of planar UWB antennas

This paper addresses the advanced progress in research and development of planar antennas for promising ultra-wideband (UWB) applications within 3.1 GHz-10.6 GHz. The special design considerations for UWB antennas are introduced first. Secondly, newly developed omnidirectional designs, especially the antennas on PCBs are reviewed. Thirdly, the characteristics of a directional modified antipodal tapered slot antenna are shown for UWB applications.