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Nonlinear optimization tools for the design of high-efficiency microwave oscillators

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3 Author(s)
S. V. Hoeye ; Signal & Commun. Theor. Group, Univ. of Oviedo, Gijon, Spain ; F. Ramirez ; A. Suarez

A new systematic method is presented for the design of high-efficiency microwave oscillators. It is based on the control of the transistor output-voltage waveform, through the combined use of a nonperturbing auxiliary generator and a substitution generator. The nonperturbing generator sets the oscillation frequency at the desired value during the entire design process. The combination of the two generators allows obtaining a quasisquare output-voltage waveform, with optimum harmonic components to maximize the efficiency. Attention is paid to the stability and phase noise of the implemented oscillator, which are analyzed versus technological parameters. A 6-GHz oscillator has been designed using these techniques, with good experimental results.

Published in:

IEEE Microwave and Wireless Components Letters  (Volume:14 ,  Issue: 5 )