| The wireless system is being rapidly proliferated in our life. The growing of capacity in wireless communication requires a new type of wireless communication method which does not effect current systems. A new system that fulfills this requirement is the Ultra-Wide bandwidth (UWB) impulse radio. In addition, the UWB system also promises low power, covert communication, and very high processing gain. In this dissertation, an UWB system which can lead this next generation of communications of an UWB radio is introduced.; In this work, the complete front-end of an UWB radio and its components are described in a detailed analysis. The main focus of this work is the design of the UWB system's wide-bandwidth components.; In the course of this dissertation, the UWB system, its UWB signal properties and its possible system architecture are described. Based on these system characteristics, required RF components are designed with IBM's Silicon Germanium (SiGe) 0.5 μm process and analyzed. Using this technology, the two important front-end functions highlighted in this work are signal amplification for wide-bandwidth and correlation detection of the signal.; Theoretical investigation of the conventional front-end components illustrates deficiencies of current technologies that frustrate the wide-bandwidth design task. Along with these investigations, possible solutions for wide-bandwidth components design are provided.; As final goals of this dissertation, the new UWB system design has been constructed with a sinusoidal correlator template, and a wide-bandwidth LNA and mixer have been designed. The LNA achieves 0.8 GHz bandwidth, 8.4 dB flat gain over its frequency range, 3 dB noise figure and −6 dBm dynamic range with shunt-series feedback topology. The mixer achieves 13 dB conversion gain, 15 dB noise figure and −6.3 dB dynamic range using the CS-CG pair as the mixer's transconductance. |
