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Theses

ANTENNES RECONFIGURABLES A BASE DE MEMS RF

Abstract : This thesis deals with the study of RF MEMS based reconfigurable antennas. The considered
approach is the radiation pattern diversity for mobile and base station. It reveals itself an
interesting diversity scheme especially in indoor conditions as it enables link budget optimization,
and provides a way to reduce fading in multipath environments, raise up data rate and meanwhile
the number of users by reducing interferences between them.
A state-of-the-art about reconfigurable antennas solutions along with an introduction to RF MEMS
is presented. These components show high RF performances, great linearity, along with much
reduced power consumption compared to their equivalent solid-state devices. These advantages
become even more obvious at millimeter-wave frequencies, where new applications are
emerging. In addition, they can be integrated with CMOS circuits on silicon or fabricated with the
antenna on various substrates.
The main developments in this study are the implementation of a modeling and optimizing
method of parasitic antenna arrays and the integration in these antennas, through equivalent
electrical models, of radiofrequency microelectromechanichal (MEMS RF) switches, in order to
reconfigure their radiation patterns.
It indeed reveals itself necessary to model these systems in order to have a reliable, efficient
design of switched parasitic array antennas. Beyond these modeling efforts, passive antenna
prototypes haves been realized and measured, validating the whole design method. An active
prototype, integrating RF MEMS devices have then be developed. The problem of modeling and
integrating these RF MEMS devices in antennas has then been tackled. Beam forming antennas
have eventually been developed, based on reconfigurable antenna cells, each forming a subarray
of a larger array.
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https://tel.archives-ouvertes.fr/tel-00166530
Contributor : Laurent Petit <>
Submitted on : Tuesday, August 7, 2007 - 9:32:27 AM
Last modification on : Thursday, June 11, 2020 - 5:04:04 PM
Long-term archiving on: : Friday, April 9, 2010 - 12:23:56 AM

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  • HAL Id : tel-00166530, version 1

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CEA | UJF | DRT | LETI | CEA-GRE

Citation

Laurent Petit. ANTENNES RECONFIGURABLES A BASE DE MEMS RF. Micro et nanotechnologies/Microélectronique. Université Joseph-Fourier - Grenoble I, 2007. Français. ⟨tel-00166530⟩

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