UWB Signals and Systems

Abstract

this chapter introduces UWB signals and systems. The utilization of UWB systems, in the last one hundred years, is described in a brief history of UWB signals and systems. This chapter shows some examples of UWB signals and characterizes the time domain and frequency domain properties of these signals. It is shown, that baseband UWB signals can be easily generated using circuits built in a CMOS technology. The chapter ends with a study of the interaction between UWB signals and the antennas used to transmit and receive them. In this analysis, a methodology that allows to calculate the shape of the received UWB signal in an antenna link is developed. Using this methodology, it is show that the optimal input impedance of an UWB receiver is not necessarily the same as the optimal input impedance for a narrow band signal. There is also an analysis about the best type of antenna for UWB signals and how each type of antenna affected the PSD of the radiated signal.