Uncertainty estimation in SiGe HBT small-signal modeling

An uncertainty estimation and sensitivity analysis is performed on multi-step de-embedding for SiGe HBT small-signal modeling. The uncertainty estimation in combination with uncertainty model for deviation in measured S-parameters, quantifies the possible error value in de-embedded two-port parameters (Y and Z - parameters). The analysis is applied to a 0.35 /spl mu/m 60 GHz f/sub T/ SiGe HBT in frequency range 45 MHz to 26 GHz.