Cookies help us deliver our services. By using our services, you agree to our use of cookies.

Cuvillier Verlag

Publications, Dissertations, Habilitations & Brochures.
International Specialist Publishing House for Science and Economy

Cuvillier Verlag

De En Es
Wideband GaN Microwave Power Amplifiers with Class-G Supply Modulation

Hard Copy
EUR 44.90

EUR 31.40

Wideband GaN Microwave Power Amplifiers with Class-G Supply Modulation (Volume 48) (English shop)

Nikolai Wolff (Author)


Extract, PDF (1.3 MB)
Table of Contents, PDF (560 KB)

ISBN-13 (Hard Copy) 9783736999312
ISBN-13 (eBook) 9783736989313
Language English
Page Number 170
Lamination of Cover matt
Edition 1.
Book Series Innovationen mit Mikrowellen und Licht. Forschungsberichte aus dem Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik
Volume 48
Publication Place Göttingen
Place of Dissertation TU Berlin
Publication Date 2019-02-06
General Categorization Dissertation
Departments Telecommunications and communications engineering
Keywords Supply modulation, Theory of Class-G Supply Modulation, Power back-off, efficiency, Quasistatic GaN-HEMT, knee I-V effects, Power amplifier, Baseband signal distortions, transducer gain, Quantification of nonlinear distortions, The RF power GaN-HEMT, Gallium-Nitride, Epitaxial, device structure, charge-trapping, Dynamic I-V measurements, Slow compressive gain, gate-lag, GaN-based Schottky diodes, Digital Isolators,Common-mode suppression, wideband modulated measurements, Volterra-based models, Milestone Class-G Systems

The continuous and rapidly growing demand for mobile communication access led to a major increase in the number of base stations worldwide to provide sufficient coverage and quality of service. As a consequence, mobile communication networks have become a significant contributor to global energy consumption. Several advanced topologies for efficiency improvement of RF power amplifiers have been developed. Modulating the amplifier’s supply voltage according to the variation of the envelope signal is one of the most promising concepts. This topology is investigated here, with an architecture that switches the supply voltage of the power amplifier in discrete levels with a class-G supply modulator.
The thesis addresses comprehensively all aspects of class-G supply modulation. Several prototype designs were realized to validate the theory and to gain experience on the influence of the corresponding parameters. These include the discrete supply voltage levels, the switching thresholds, and the interface between the RF PA and the class-G supply modulator. Efforts both on improving the RF power amplifiers and developing several class-G supply modulators were also involved. This work covers the progress up to a PA module that provides an instantaneous modulation bandwidth of 120 MHz and achieves better performance than state-of-the art continuous supply modulation systems.
Class-G supply modulated RF power amplifiers based on gallium nitride technology exhibit a strong nonlinear behavior, therefore linearization is required. For this purpose, the linearization with digital predistortion based on behavioral models is optimized for the class-G topology and a novel predistorter model is developed and analyzed.