State space analysis for internal nonlinearities and noise modeling of a microwave MESFET amplifier

Abstract

State space analysis can be successfully used to analyze the amplifier, load and the feed back circuits when they are all connected to each other. The main advantages of state space analysis of feedback amplifiers are the possibility of discussion of internal and structural nonlinearities and eigenvalue analysis of the whole amplifier. In this paper, state space analysis of a microwave amplifier is completely discussed. In this model, the effects of internal noise both in gate to source and drain to source junctions, are briefly taken into account. The transfer functions as well as input and output driving impedances of the amplifier are determined using proper state variables. This analysis will be valid when the network is in a linear region. © 2010 Praise Worthy Prize S.r.l. - All rights reserved.