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Analysis of superregenerative oscillators in nonlinear mode

Abstract: Superregenerative oscillators in a nonlinear mode are investigated in detail using methodologies based on envelope transient, complemented with additional algorithms. A maximum-detection technique is applied to obtain the input-power threshold for nonlinear operation under different implementations of the quench signal. A mapping procedure enables the prediction of hangover and self-oscillation effects. It is based on the detection of the sequence of local maxima in the envelope amplitude after the application of a single input pulse. Using a contour-intersection method, and depending on the analysis time interval, it is possible to quantify the hangover effects and obtain the oscillation boundary, in terms of any two significant parameters. Then, a compact time-variant behavioral model is derived, valid in the absence of hangover and self-oscillation effects. It consists of a single time-variant Volterra kernel and is applicable provided that the amplitude transitions occur outside the sensitivity interval. Various methodologies are tested in a practical FET-based oscillator at 2.7 GHz. The prototype has been manufactured and measured, obtaining good agreement with the analysis results.

 Autoría: Hernández S., Suárez A.,

 Fuente: IEEE Transactions on Microwave Theory and Techniques, 2019, 67(6), 2247-2258

 Editorial: Institute of Electrical and Electronics Engineers Inc.

 Fecha de publicación: 01/06/2019

 Nº de páginas: 12

 Tipo de publicación: Artículo de Revista

 DOI: 10.1109/TMTT.2019.2910014

 ISSN: 0018-9480,1557-9670

 Proyecto español: TEC2017-88242-C3-1-R

 Url de la publicación: https://doi.org/10.1109/TMTT.2019.2910014