History of ultra wideband communications and radar: Part II, UWB radars and sensors

This article is the second in a two-part review addressing the history of u ltra wideband (UWB) communications and radar The first part covered UWB com munications, and were UWB radars and sensors are addressed. There is overla p in the choice of subcomponents for UWB communications and radar systems, therefore the focus is on the novelties and capabilities offered by UWB rad ar/sensor systems and specific development requirements. UWB signals offer signal bandwidth delivered in a very short duration of time (high instantan eous bandwidth). UWB radars/sensors also probe the target's optical respons e more effectively, promise the capability of high resolution target imagin g and detection, and in some application areas, have achieved commercial su ccess in ground, wall and foliage penetration, synthetic aperture radar (SA R) and target imaging. In both reviews, the pioneering, innovative and fund amental contributions to the field are presented.