Harmonic-balance techniques for the in-depth stability analysis of power amplifiers

Conference: GeMIC 2008 - German Microwave Conference
03/10/2008 - 03/12/2008 at Hamburg-Harburg, Germany

Proceedings: GeMIC 2008

Pages: 6Language: englishTyp: PDF

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Suarez, Almudena (Dpt. Ingenieria de Comunicaciones. University of Cantabria)
Jeon, Sanggeun; Rutledge, David (California Institute of Technology (Pasadena))

Power amplifiers often exhibit undesired behavior from certain input power value which cannot be predicted with a small-signal stability analysis. Among the commonly observed undesired phenomena are spurious oscillations, frequency divisions, hysteresis or chaos. In this contribution, simulation tools are presented, enabling an in-depth study of the origin and characteristics of these phenomena. The developed global stability analysis and stabilization tools have enabled an efficient suppression of the undesired behavior in a switching-mode power amplifier, with minimum degradation of the amplifier performance, in terms of drain efficiency and output power.