A New Frequency Domain Approach to the Analysis of Nonlinear Microwave Circuits

Design of Microwave Monolithic Integrated Circuits (MMIC´s) is currently limited by the lack of suitable analysis and computer aided design tools capable of efficiently handling large-scale analog nonlinear circuits. In this paper we address this problem and present a new multi-frequency technique for the analysis of nonlinear circuits. A novel feature of the method is that nonlinear analysis is performed entirely in the frequency domain using a generalized power series. We show how this technique can be applied to the analysis of MESFET circuits and, as an example, we consider gain saturation in a GaAs MESFET amplifier.