Analysis and Design of Ultra-Wideband Transceiver and Array

Abstract

Ultra wideband (UWB) is a new emerging short-range device technology with potential benefits for wireless communications, radars, localization, tracking and security applications. UWB systems exchange information by transmitting and receiving short electromagnetic pulses. Therefore, it is very essential to understand the pulse transmission, propagation and reception by UWB terminals. Fundamentally, pulse radiation is different from narrowband signals. Hence, understanding the pulse radiation, effect of the antenna on pulse shape, and signal distortion by band-limited channel are the high priority goals of UWB technology developers. This thesis presents the derivation of the impulse response of an antenna in both transmitting and receiving modes to evaluate the effect of the antenna on UWB pulse shape. This thesis also discusses the development of a UWB signal source that generates sub-nanosecond pulses. Lastly, this thesis presents the system designs for UWB angle-of-arrival (AOA) receivers, UWB monopulse receivers, and medical imaging UWB radars.