TY - JOUR
T1 - Nonlinear design technique for high-power switching-mode oscillators
AU - Jeon, Sanggeun
AU - Suárez, Almudena
AU - Rutledge, David B.
N1 - 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. Suárez 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
PY - 2006/10
Y1 - 2006/10
N2 - 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.
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.
KW - Class-E tuning
KW - High-efficiency oscillator
KW - Non-linear optimization
KW - Oscillation stability
KW - Startup criterion
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U2 - 10.1109/TMTT.2006.882406
DO - 10.1109/TMTT.2006.882406
M3 - Article
AN - SCOPUS:33749846383
VL - 54
SP - 3630
EP - 3639
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
SN - 0018-9480
IS - 10
M1 - 1705681
ER -