GaN Digital Outphasing PA

Hoffmann, Th.; Wentzel, Andreas; Huhn, Florian; Heinrich, W.

doi:10.23919/eumc.2019.8910788

Cited by 2 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This paper builds on our previous work by implementing a digital outphasing PA module including GaN-based PA monolithic microwave integrated circuit (MMIC), hybrid filter, and bias circuitry. It is the extended version of [12] and provides additional insights in aspects that could not be fitted within the limited space of the original work. We added the results of a full 3D EM simulation of the output network inductors and simulated input impedance characteristics (the section "3D EM Simulation of Output Inductors"))before the measurements section to get a better insight of their behavior.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

GaN digital microwave outphasing PA

Hoffmann

Wentzel

Flisgen

et al. 2020

Int. J. Microw. Wireless Technol.

Self Cite

View full text Add to dashboard Cite

This paper presents a novel GaN-based digital outphasing power amplifier (PA) for the 800 MHz range. The PA reaches a maximum output power of 5.8 W at 30 V final-stage (FS) drain supply voltage. A novel output combiner circuit is used and efficiency is improved by resonant commutation of the FSs and optimized driver circuits for the two GaN push-pull FSs. 3D electromagnetic simulation of output network has been conducted to extract an equivalent circuit model and to access full information in terms of functionality and broadband impedance characteristics for optimized outphasing operation in the final design. Measured total efficiencies (ηtot) of 59 and 25% at 0 and 10 dB power back-off are achieved, respectively, fitting the simulation quite well. The proposed digital outphasing module is a promising candidate for fully digitized base-station architectures in future wireless communications.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Moreover, a detailed description of the preamplifier chip between modulator output and outphasing PA input is given (the section "Driver Circuits"). Also, a special build-up procedure to suppress ringing effects in the preamplifiers is explained compared to [12] (the section "Realization").…”

Section: Introductionmentioning

confidence: 99%