On the use of Cann´s model for nonlinear behavioral-level simulation

Behavioral level techniques are presently very popular tools for the nonlinear simulation of mobile communication circuits and systems. The use of Cann´s (1980) model for modeling nonlinear circuits and systems is discussed in this paper. It is shown that this model has a nonphysical behavior for the small-signal regime in most cases (it cannot be expanded in a Taylor series) and gives incorrect predictions for nonlinear products. When nonlinearities are to be taken into account in the simulation (intermodulation, adjacent channel power, etc.), the use of Cann´s model should be avoided or at least it should be used with extreme care