A New Two Temperatures Noise Model for FET Mixers Suitable for CAD

In this paper, we propose a simple and accurate new model for determining the noise correlation matrix of FETs for mixer applications. Using this nonlinear noise model, and by a judicious choice of the terminations value present at each flequency, it is shown that the noise figure of FET mixers can be greatly improved. HP EEsof and IEMN are investigating incorporating the model into HP EEsof's products so as to widely increase its availability.