ABSTRACT

Although there is considerable overlap in the subcomponents of ultrawideband (UWB) communications systems and UWB radar/sensor systems, it is natural to treat the history of these two systems separately for several reasons. The UWB communications system uses subcomponents based on principles that have been known for decades, whereas the UWB radar/sensor system uses subcomponents based on principles novel to the radar community. UWB radar/sensing offers the capability of high-resolution target imaging and detection, and it has achieved some commercial success in penetration and imaging of ground, wall, and foliage, whereas UWB communications systems are yet to demonstrate signiŽcant virtues. UWB radar systems are also less likely to cause interference to conventional receivers. Sections 2.2 through 2.7 discuss UWB communications, whereas Sections 2.8 through 2.11 extend the discussion to UWB radars and sensors. Both parts concentrate on the pioneering, innovative, and fundamental contributions to UWB technology. Problems involved in UWB interference testing and application are also described here.