Antennes à faible profil en ondes millimétriques : étude d’antennes à cavités de Perot–Fabry micro-usinées et de réseaux réflecteurs repliés
Auteur / Autrice : | Mohd Fairus Mohd Yusoff |
Direction : | Ronan Sauleau |
Type : | Thèse de doctorat |
Discipline(s) : | Traitement du signal et télécommunications |
Date : | Soutenance en 2012 |
Etablissement(s) : | Rennes 1 |
Ecole(s) doctorale(s) : | École doctorale Mathématiques, télécommunications, informatique, signal, systèmes, électronique (Rennes) |
Partenaire(s) de recherche : | autre partenaire : Université européenne de Bretagne (2007-2016) |
Mots clés
Résumé
Low-profile antennas are attractive in communications and sensor applications due to desirable features such as low cost, light weight, conformability, and ease of integration. A major challenge in low-profile antenna design is the trade off between the (reduced) antenna profile and performance. Therefore, two attractive antenna concepts are studied here, namely micromachined Fabry-Perot (FP) cavity antennas and folded reflectarray antennas. In this thesis works, we have designed a novel configuration of micromachined FP cavity antennas using silicon membrane and bulk micromachining techniques in W band. Several antenna configurations have been studied and fabricated. On the other hand, folded reflectarray antennas combine some of the best features of printed antenna arrays and reflector antennas. Therefore we have designed folded reflectarray antennas for linear and circular polarization in V band. In the linear polarization (LP) case, two additional configurations have been studied: i) multi-layered folded reflectarrays, and ii) beam scanning antennas with shifted feed position. As for CP polarization, two different kinds of antenna configurations using meander polarizer and left handed circular polarization surface (LHCPSS) have been studied. The simulation results are then valided experimentally.