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Étude de dispositifs hyperfréquences accordables en technologie microfluidique

Abstract : The proliferation of user needs in the field of telecommunications, has led to overexploitation of the frequency spectrum. This led to the scarcity of frequency bands leading to a need for efficient management of frequencies. Constraints were added to the transmitting / receiving systems and in particular on the filters to prevent the saturation of the services. In this thesis, work is mainly oriented towards the design of resonators, planar and volumetric (3D) tunable filters in the field of millimeter wave frequencies (> = 30 GHz) using a new tunable technique which is microfluidic. This is a new approach to agility which consists of circulating the material (conductive, dielectric or magnetic liquids) in a dielectric substrate through micro channels. The dielectric substrate used is a resin SU-8 which provides flexibility in the implementation of microchannels and volumetric structures thanks to its good form factor (≈ 50%). The circulation of fluid in the substrate allows to locally modifying the electromagnetic properties of the medium. This leads to a change in the resonant frequency of the device.
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Daouda Lamine Diedhiou. Étude de dispositifs hyperfréquences accordables en technologie microfluidique. Autre. Université de Bretagne occidentale - Brest, 2012. Français. ⟨NNT : 2012BRES0049⟩. ⟨tel-00857484⟩

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