Reconfigurable metamaterial-based antenna using a novel class of miniaturized agile unit-cells.

Zarghooni, Behnam (2015). Reconfigurable metamaterial-based antenna using a novel class of miniaturized agile unit-cells. Thèse. Québec, Université du Québec, Institut national de la recherche scientifique, Doctorat en télécommunications, 166 p.

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Résumé

In this thesis, a new class of reconfigurable and compact metamaterial unit-cells is introduced and used to present a novel technique for beam-switching antennas. Two metamaterial inspired antennas are designed and implemented using this technique at two different frequency bands i.e. S-band and millimeter-wave band. The prospective role of reconfigurable unit-cells in the future of metamaterial theory is investigated and a novel reconfigurable metamaterial unit-cell is designed that can provide a controllable refractive index. Moreover, a novel miniaturization technique is introduced that can be applied on any rectangular-shaped metamaterial unit-cell. This technique is analytically investigated and a step-by-step guideline is provided. A combination of these two concepts is exploited to design a controllable metamaterial medium that can be easily integrated in the structure of planar antennas. As the final objective of this work, the aforementioned artificial medium is embedded on the substrate of a planar dipole antenna and a radiation-pattern reconfigurable antenna with a switchable beam in the E-plane is designed and implemented in the S-band. The same technique is used at millimeter waves and an antenna with deflected beam in this band is presented. Both antenna structures are fabricated and measured to validate the simulation results. Also, the designed unit-cells in the S-band are fabricated and the performance of the unitcells is verified by a modified version of the well-known free-space measurement method. Two custom-made dielectric lenses are designed and fabricated for this method. Furthermore, an analytical model is derived to explain the beam-tilting effect produced by the metamaterial unit-cells. This model successfully describes the behavior of both antennas at the vicinity of the metamaterial unit-cells.

Type de document:	Thèse Thèse
Directeur de mémoire/thèse:	Denidni, Tayeb A.
Mots-clés libres:	métamatériaux; antennes; unités cellulaires
Centre:	Centre Énergie Matériaux Télécommunications
Date de dépôt:	11 févr. 2016 18:45
Dernière modification:	01 oct. 2021 15:48
URI:	https://espace.inrs.ca/id/eprint/3305

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