Abstract
A hybrid backward/forward finite-difference time-domain (FDTD) method is suggested for efficient analysis of field-effect transistors (FETs) in the nonlinear regime. The distributed model is exploited wherein the FET is considered as a nonlinear active multiconductor transmission line. The Curtice cubic model is used to investigate the nonlinearity. Results are compared to the leap-frog (LF) FDTD. It is observed that stability of the method is not restricted to the Courant–Friedrichs–Lewy condition. The time gain of eight is achieved compared to the LF-FDTD with tolerable accuracy. The presented method is accurate enough with the week nonlinearity assumption.
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