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Filtres hyperfréquences reportés en surface, à fort facteur de qualité et compensés en température

Abstract : In this work, we study microwave filters for space telecommunication with two main application fields. The devices should be surface mounted, on printed circuit board to remain low-cost with a minimal bulkiness and high performances. We also want the frequency functions to be kept efficient despite the temperature shift in space. The first chapter deals with the state of the art of the field by presenting the needs: the multiphysics simulations and the filter design, the surface mounted process, and their temperature compensation. In the second chapters, we focused on the multiphysics modeling and how we have applied it in our study. We have also characterized the materials and the microwave system thanks to a dedicated measurement bench: the permittivity, the dielectric losses, the conductivity, and the frequency shift are collected to supply the databases. In the last two chapters, we designed resonators and filters. The mounted surface technologies need to be well controlled to provide sufficient efficiency for the devices. We achieve thermal frequency stability by using specific materials, non-affected by thermal effects, or through a combination of materials with specific properties to create an offset. At last, we applied these techniques to show different types of filter that can be an answer to our needs.
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Submitted on : Wednesday, March 17, 2021 - 10:44:19 AM
Last modification on : Thursday, March 18, 2021 - 3:20:13 AM


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  • HAL Id : tel-03171738, version 1



Thibault Charlet. Filtres hyperfréquences reportés en surface, à fort facteur de qualité et compensés en température. Electronique. Université de Limoges, 2021. Français. ⟨NNT : 2021LIMO0010⟩. ⟨tel-03171738⟩



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