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Injection d'harmonique dans un Tube à Ondes Progressives : amélioration de la puissance de sortie

Abstract : Traveling Wave Tubes (TWT) are amplifiers for microwave signals. Nonlinearity occurs for high input powers, and compromises their performances. The overall aim of this Ph.D thesis is to improve the linearity of the tubes ; we present a method where the second harmonic (2F) is injected simultaneously with the fundamental signal (F).

A theoretical study of the nonlinearity of TWT identifies the "inertial saturation", as an essential aspect of output power saturation. The possibility of improving linearity in TWT is explained with analytical models and numerical simulations, and then validated with experimental measurements on industrial tubes.


This work envisages to allows industrial applications to improve the efficiency of TWTs.
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https://pastel.archives-ouvertes.fr/tel-00007146
Contributor : Juliette Plouin Connect in order to contact the contributor
Submitted on : Tuesday, October 19, 2004 - 10:47:25 AM
Last modification on : Sunday, June 26, 2022 - 9:39:05 AM
Long-term archiving on: : Friday, April 2, 2010 - 8:47:29 PM

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  • HAL Id : tel-00007146, version 1

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Juliette Plouin. Injection d'harmonique dans un Tube à Ondes Progressives : amélioration de la puissance de sortie. Matière Condensée [cond-mat]. Ecole Polytechnique X, 2004. Français. ⟨tel-00007146⟩

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