Design of High Linearity Ultra Wideband Low Noise Amplifier for Robust UWB Receiver

摘要

In this paper, the significance of linearity for UWB front-end circuit is discussed. The effects of strong narrow band interferer on UWB signal are investigated and the justification of IIP{sub}3 as a measure of linearity for UWB system is evaluated. ideband linearization techniques for UWB LNA are first proposed in this work. A high linearity UWB LNA is designed in TSMC 0.18μ CMOS process The simulation results show that the designed LNA exhibits very high IIP{sub}3 (>6.9 dBm) while maintaining low noise figure (3～6 dB) over the design frequency range (3-5 GHz).