DOI: https://doi.org/10.15368/theses.2015.113
Available at: https://digitalcommons.calpoly.edu/theses/1466
Date of Award
6-2015
Degree Name
MS in Electrical Engineering
Department/Program
Electrical Engineering
Advisor
Vladimir I. Prodanov
Abstract
An investigation into the stability of negative resistance-based source combining power amplifiers is conducted in this thesis. Two different negative resistance-based source combining topologies, a series and parallel version, are considered. Stability is analyzed using a simple and intuitive broadband approach that leverages linear circuit stability criterion and two different linearization methods: linearization around the operating point and in the frequency domain. Using this strategy, it is shown that conditions for self-sustained oscillation exist for both topologies. For the series combining topology, self-sustained oscillation is prevented by means of injection locking.