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Harmonic-balance technique for the shortening of the initial transient of microwave oscillators

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3 Author(s)
Ramirez, F. ; Dept. of Commun. Eng., Cantabria Univ., Santander, Spain ; Suarez, A. ; Sancho, S.

Computer aided design (CAD) tools have been developed to reduce oscillator start-up times while maintaining their original features in terms of oscillation frequency or power. The tools are based on the application of pole-zero identification to the unstable solution from which the oscillation originates. The identification is combined with a harmonic-balance technique that maintains the steady-state oscillatory solution at the desired values. A technique has also been developed to eliminate spurious oscillations while maintaining the desired features of the oscillator circuit. Two different circuits are presented: a 2.4 GHz oscillator for switched operation and an unstable oscillator at 9 GHz to which the stabilization technique is applied. The experimental results have shown good agreement with the simulations.

Published in:

Microwave Symposium Digest, 2005 IEEE MTT-S International

Date of Conference:

12-17 June 2005