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Modélisation non-linéaire et en bruit de composants micro-ondes pour applications à faible bruit de phase

Sébastien Gribaldo 1
1 LAAS-MOST - Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : This work deals with nonlinear noise modelling of amplifiers to be applied to oscillator design. The technology which has been used is the SiGe one within HBT transistors. In this manuscript we will try to understand how to accurately model the noise phenomena taking place in transistors to better predict the phase noise behavior of RF amplifiers placed in a oscillating feedback loop. A hybrid technology X band amplifier design using this later modelling is pointed out. Therefore, the topology used to design this device is quite simple and allow us to obtain very good results for the phase noise and the gain performances. Another issue is how to apply these later techniques to the characterization and the modelling of FBAR or SMR resonators. These resonators are used for few years to realize integrated high reliable RF synthesizers. Nevertheless, they get their own contribution to the overal system noise and as a consequence have to be modelled toward their noise and their nonlinearities as an active component. This work presnts fistr the different noise measurement techniques of the active components, such as transistors or integrated resonators. Component modelling techniques are then described and applied to a nonlinear model including noise sources. Then, the optimization and the design of a low phase noise amplifier is detailled. This hybriid technology amplifier features a very good perfomance for its phase noise added to a reduced consumption. Finally, the modelling and measurements techniques described before are applied to FBAR or SMR resonators in order to extract their noise contribution, and also a nonliner noise model of these components. This work demonstrates that an accurate nonmlinear noise modelling can be done. This later should be very suitable to design and optimize circuits integrated in stable or ultrastable synthesizers, whether it is for time and frequency applications needing a high spectral purity or for MMICs applications where the specta l purity and a good integration have to be made at the same time.
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Submitted on : Tuesday, November 18, 2008 - 10:00:34 AM
Last modification on : Thursday, June 10, 2021 - 3:06:50 AM
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  • HAL Id : tel-00339514, version 1

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Sébastien Gribaldo. Modélisation non-linéaire et en bruit de composants micro-ondes pour applications à faible bruit de phase. Micro et nanotechnologies/Microélectronique. Université Paul Sabatier - Toulouse III, 2008. Français. ⟨tel-00339514⟩

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