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Étude, conception et caractérisation de nouvelles topologies d’antennes à résonateurs diélectriques : application aux nouveaux systèmes de communications sans fil

Abstract : Nowadays, the constant increase of information traffic leads to a spectacular technological development in the field of telecommunications, whether it is cellular network, television, satellite, WIFI or other applications. This revolution is creating new needs and is inspiring a phenomenal technological evolution in the field of antenna design. Modern antennas in fact must meet increasingly harder requirements in terms of compactness, electromagnetic interference reduction, robustness to environment, increased gain, broadband bandwidth, intelligence, etc. The work carried out in this thesis mainly focuses on the design of new simple antenna topologies of small size, intelligent, insensitive to environment, broad and ultra-wide band. In particular, our interest focused on antennas based on Dielectric Resonators (DRs). In the field of the Internet of Things (IoT), we designed and realized a high-Q filter antenna based on a slot loaded rectangular dielectric resonator suitable for integration in compact IoT devices. We also designed and characterized an antenna based on a cylindrical shaped dielectric resonator (CDR). This antenna, which has been proposed to be integrated in smart meter devices, where interference sources are very present, has shown a great robustness to the surrounding environment. In addition, we proposed two new broadband and ultra-wideband antenna topologies. The first one is based on a cylindrical ring resonator, divided in four quarters characterized by two different permittivities. An air gap was inserted separating the resonator in two parts. This innovative structure gives our antenna a wide band behavior and stability in terms of radiation pattern. This structure has been used in an array configuration to achieve a reconfigurable radiation pattern. Starting from this work, the second antenna achieves an ultra-wideband behavior by adopting a new feeding technique as well as a reduced ground plane.
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https://tel.archives-ouvertes.fr/tel-01865823
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Kaoutar Allabouche. Étude, conception et caractérisation de nouvelles topologies d’antennes à résonateurs diélectriques : application aux nouveaux systèmes de communications sans fil. Electronique. Université Côte d'Azur; Université Sidi Mohamed ben Abdellah (Fès, Maroc), 2017. Français. ⟨NNT : 2017AZUR4119⟩. ⟨tel-01865823⟩

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