NDLI: Contribution à la conception d'antennes ultra large bande impulsionnelles d'encombrement réduit

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Contribution à la conception d'antennes ultra large bande impulsionnelles d'encombrement réduit

Content Provider	Semantic Scholar
Author	Nadir, Houda
Copyright Year	2018
Abstract	Ce memoire presente une methodologie de conception d’antennes Ultra Large Bande volumiques a ondes progressives, d’encombrement reduit, dediees au rayonnement d’impulsions ultra-courtes dans une bande de frequence allant de 300 MHz a 3 GHz. L’objectif est de concilier une large bande de frequences rayonnees et de bonnes performances de rayonnements transitoires (niveau eleve, signaux brefs) tout en limitant l’encombrement des antennes. L’insertion d’un materiau dielectrique a ete associee au design des antennes ULB afin de reduire leurs dimensions. Ceci a conduit a la synthese et a la caracterisation de materiaux dielectriques innovants a base de geopolymeres, dont la maitrise de la valeur de la permittivite est possible. Un prototype d’antenne a ete realise, des mesures des differentes caracteristiques de rayonnement ont ete effectuees et comparees aux resultats de simulation pour s’assurer du bon fonctionnement de celle-ci. Cette antenne a egalement ete associee a des applications radar pour la detection de cibles se situant dans differents milieux (air et sol). Les reponses impulsionnelles obtenues pour les differentes scenes radar testees ont ete comparees aux resultats mesurees avec d’autres antennes connues.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://aurore.unilim.fr/theses/nxbigfile/default/6dfc324c-eba6-4876-b2fe-a3ea7c4be377/blobholder:0/2018LIMO0062.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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