Nonlinear design technique for high-power switching-mode oscillators

Sanggeun Jeon; Almudena Suárez; David B. Rutledge

doi:10.1109/TMTT.2006.882406

Nonlinear design technique for high-power switching-mode oscillators

Sanggeun Jeon, Almudena Suárez, David B. Rutledge

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

A simple nonlinear technique for the design of high-efficiency and high-power switching-mode oscillators is presented. It combines existing quasi-nonlinear methods and the use of an auxiliary generator (AG) in harmonic balance. The AG enables the oscillator optimization to achieve high output power and dc-to-RF conversion efficiency without affecting the oscillation frequency. It also imposes a sufficient drive on the transistor to enable the switching-mode operation with high efficiency. Using this AG, constant-power and constant-efficiency contour plots are traced in order to determine the optimum element values. The oscillation startup condition and the steady-state stability are analyzed with the pole-zero identification technique. The influence of the gate bias on the output power, efficiency, and stability is also investigated. A class-E oscillator is demonstrated using the proposed technique. The oscillator exhibits 75 W with 67% efficiency at 410 MHz.

Original language	English
Article number	1705681
Pages (from-to)	3630-3639
Number of pages	10
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	54
Issue number	10
DOIs	https://doi.org/10.1109/TMTT.2006.882406
Publication status	Published - 2006 Oct
Externally published	Yes

Keywords

Class-E tuning
High-efficiency oscillator
Non-linear optimization
Oscillation stability
Startup criterion

ASJC Scopus subject areas

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Nonlinear design technique for high-power switching-mode oscillators",

abstract = "A simple nonlinear technique for the design of high-efficiency and high-power switching-mode oscillators is presented. It combines existing quasi-nonlinear methods and the use of an auxiliary generator (AG) in harmonic balance. The AG enables the oscillator optimization to achieve high output power and dc-to-RF conversion efficiency without affecting the oscillation frequency. It also imposes a sufficient drive on the transistor to enable the switching-mode operation with high efficiency. Using this AG, constant-power and constant-efficiency contour plots are traced in order to determine the optimum element values. The oscillation startup condition and the steady-state stability are analyzed with the pole-zero identification technique. The influence of the gate bias on the output power, efficiency, and stability is also investigated. A class-E oscillator is demonstrated using the proposed technique. The oscillator exhibits 75 W with 67% efficiency at 410 MHz.",

keywords = "Class-E tuning, High-efficiency oscillator, Non-linear optimization, Oscillation stability, Startup criterion",

author = "Sanggeun Jeon and Almudena Su{\'a}rez and Rutledge, {David B.}",

note = "Funding Information: Manuscript received November 3, 2005; revised March 16, 2006. This work was supported by the Lee Center for Advanced Networking, California Institute of Technology. S. Jeon and D. B. Rutledge are with the Department of Electrical Engineering, California Institute of Technology, Pasadena, CA 91125 USA (e-mail: sjeon@caltech.edu; rutledge@caltech.edu). A. Su{\'a}rez is with the Communications Engineering Department, University of Cantabria, 39005 Santander, Spain (e-mail: suareza@unican.es). Color versions of Figs. 2, 6, and 13 are available online at http://ieeexplore. ieee.org. Digital Object Identifier 10.1109/TMTT.2006.882406",

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AB - A simple nonlinear technique for the design of high-efficiency and high-power switching-mode oscillators is presented. It combines existing quasi-nonlinear methods and the use of an auxiliary generator (AG) in harmonic balance. The AG enables the oscillator optimization to achieve high output power and dc-to-RF conversion efficiency without affecting the oscillation frequency. It also imposes a sufficient drive on the transistor to enable the switching-mode operation with high efficiency. Using this AG, constant-power and constant-efficiency contour plots are traced in order to determine the optimum element values. The oscillation startup condition and the steady-state stability are analyzed with the pole-zero identification technique. The influence of the gate bias on the output power, efficiency, and stability is also investigated. A class-E oscillator is demonstrated using the proposed technique. The oscillator exhibits 75 W with 67% efficiency at 410 MHz.

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Nonlinear design technique for high-power switching-mode oscillators

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Keywords

ASJC Scopus subject areas

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