A 2-D numerical simulation methodology for noise figure optimization in UHV/CVD SiGe HBT's

This paper explores the feasibility of combining calibrated AC 2-D numerical simulation and two of the latest Y-parameter-based noise models for predictive noise figure optimization in advanced UHV/CVD SiGe HBT's. At the operating current where the NE/sub min/ is the lowest, a close agreement between simulation using both noise models and measurement is achieved from 2 GHz to 18 GHz. The impact of collector doping level on noise figure is also discussed.