Signal and noise analysis in sliced model of a FET mixer

This paper presents a nonlinear signal and noise analysis of a wide gate FET mixer. The study is performed using nonlinear sliced modeling. The FET is taken into account as a distributed element and divided into several smaller pieces so that in each slice a lumped model can be applied. Calculation of passive and active elements of each slice is performed using a proper scaling approach. For noise analysis, appropriate noise sources are added to the distributed circuit. The wide gate FETs have been suggested for high power, wideband and high gain devices such as the travelling wave amplifier. The nonlinear application is suggested for a novel device named a travelling wave mixer.