Abstract
Ultra-wideband (UWB) sources and antennas are of interest for applications such as the location and identification of hidden objects, that is, land mines and unexploded ordnance (UXO). Much of the current research is being performed at the Directed Energy Directorate of the Air Force Research Laboratory (AFRL) at Kirtland AFB, NM. Although significant progress has been made in UWB technology since 1980s, new challenges continue to arise.1, 2, 3, 4, 5, 6 Recent requirements have included antennas that are lighter weight, have wider bandwidths, and operate at lower frequencies. Noteworthy progress is also evident in the development of fast switching technology. In this paper, we describe recent progress in sources, antennas, and lens technology and new developments in gas and solid-state switching.
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