Contributions to the Design of RF Power Amplifiers

dc.contributor.authorAcimovic, Igor
dc.description.abstractIn this thesis we introduce a two-way Doherty amplifier architecture with multiple feedbacks for digital predistortion based on impedance-inverting directional coupler (transcoupler). The tunable two-way Doherty amplifier with a tuned circulator-based impedance inverter is presented. Compact N-way Doherty architectures that subsume impedance inverter and offset line functionality into output matching networks are derived. Comprehensive N-way Doherty amplifier design and analysis techniques based on load-pull characterization of active devices and impedance modulation effects are developed. These techniques were then applied to the design of a two-way Doherty amplifier and a three-way Doherty amplifier which were manufactured and their performance measured and compared to the amplifier performance specifications and simulated results.
dc.publisherUniversité d'Ottawa / University of Ottawa
dc.subjectPower amplifier (PA)
dc.subjectDoherty amplifier
dc.subjectload-pull measurement
dc.subjectefficiency enhancement
dc.subjectimpedance matching
dc.subjectimpedance modulation
dc.titleContributions to the Design of RF Power Amplifiers
dc.contributor.supervisorMcNamara, Derek
dc.embargo.terms2018-02-09 00:00:00énie / Engineering
uottawa.departmentScience informatique et génie électrique / Electrical Engineering and Computer Science
CollectionThèses, 2011 - // Theses, 2011 -