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Etude des Antennes à Résonateurs Diélectriques. : Application aux Réseaux de Télécommunications

Abstract : A fast technological development in the telecommunications domain, as mobile telephony, wireless networks, TV over Satellite, Radar Applications (civil or military)…etc, is observed. This considerable growth has led to enormous needs and caused a major technological evolution in antennas. These have to face different needs such as gain improvement, bandwidth enlargement, and different existing problems, such as cost and overcrowding…etc. Though, our goal is to design antenna topologies that are simple, having Low overcrowding and relatively with high gain operating in multiband and/or ultra large. To achieve this we headed to Dielectric Resonator Antennas (DRA) in UHF and SHF bands. Recently they have been the subject of several studies and have gained great interest from both academic and industrial sectors. Due to their diverse and simple geometries, they can be fed with different usual techniques. Furthermore, they can be smaller than patch antennas. The first part of this work has focused on the study of cylindrical DRAs, and then a validation of the simulating tool has been done after comparison with measurement results. For a multi-standard utilization, enlargement antennas’ operating bands, to have bi-band behaviour, get a modification of the resonant frequency and also a reduction of the overcrowding, the second part is dedicated to the study of new resonator topologies based on a vertical and radial stack of two cylinders, and then a multilayer and ring topologies. The obtained results found their applications in GSM900-DCS1800-UMTS-WiFi…
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https://tel.archives-ouvertes.fr/tel-01172513
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Submitted on : Tuesday, July 7, 2015 - 3:02:16 PM
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Ahmed Benomar. Etude des Antennes à Résonateurs Diélectriques. : Application aux Réseaux de Télécommunications. Electronique. Université de Limoges, 2015. Français. ⟨NNT : 2015LIMO0025⟩. ⟨tel-01172513⟩

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