A Class E/Fodd Power Oscillator Incorporating a Distributed Active Transformer

A power combined high-efficiency oscillator is proposed using a hybrid class E and class F tuning, where the odd harmonics are shorted: the class E/F odd . The oscillator is achieved by adding a high-pass feedback network to a class E/F odd amplifier, where the output's odd harmonics are used t...

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Bibliographic Details
Published inIEEE transactions on microwave theory and techniques Vol. 68; no. 6; pp. 2409 - 2418
Main Authors Apperley, Thomas, Nielsen, John, Okoniewski, Michal
Format Journal Article
LanguageEnglish
Japanese
Published New York IEEE 01.06.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Class E/F
Couplings
distributed active transformer (DAT)
Electric power distribution
Energy conversion efficiency
Feedback
Harmonic analysis
Harmonics
high-efficiency oscillator
high-power oscillator
Inductors
Logic gates
Oscillators
power combining
switching oscillator
Transformers
Transistors
Tuning
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Summary:A power combined high-efficiency oscillator is proposed using a hybrid class E and class F tuning, where the odd harmonics are shorted: the class E/F odd . The oscillator is achieved by adding a high-pass feedback network to a class E/F odd amplifier, where the output's odd harmonics are used to construct the required square-like wave at the input. Furthermore, two class E/F odd oscillators can be power combined using a distributed active transformer, where magnetic coupling to the high-pass feedback network can be realized using a third transformer winding. Two power combined class E/F odd oscillators designed using this method have an oscillation frequency of 10.1 MHz, a total output power of 324 W and dc-to-RF conversion efficiency of 75%.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2020.2977898