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Filtres accordables volumiques à forts facteurs de qualité pour des applications spatiales

Abstract : At a time when the amount of information and the number of users go through the roof in telecommunication market, the telecommunication systems tend to improve the management of their capacity by moving toward reconfigurable RF devices. However frequency and bandwidth allocated are still restricted. Regarding tunable OMUX filters, the actuation systems generally degrade the overall performances of the device and raise questions in terms of mechanic and thermic.We first demonstrated the feasability of a two state filter with constant narrowband, using a dielectric material (alumina) in rotation inside a metallic housing. Then, we suggested solutions to control both frequency and bandwidth with the translation of a ceramics. We deal with quality factor in the range of ten of thousands for these applications. Eventually, we validated some principle for tunable filters thanks to the efficiency of 3D plastic printer.
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Nicolas Jolly. Filtres accordables volumiques à forts facteurs de qualité pour des applications spatiales. Electronique. Université de Limoges, 2015. Français. ⟨NNT : 2015LIMO0103⟩. ⟨tel-01278282⟩

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