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Étude et conception d’antennes à base de métasurfaces destinées aux applications spatiales et aéronautiques

Abstract : This thesis aims at highlighting recent advances in the field of metasurfaces. These structures have been used to improve the performances of conventional antennas or to design new antenna concepts. The work has been carried in the framework of a collaboration with industrial partners, namely Airbus Safran Launchers, Airbus Group Innovations and CNES. The manuscript is organized into two parts. The first part is devoted to metasurfaces used as partially reflecting surfaces (PRS) to design Fabry-Perot cavity antennas. In this part, an analytical model allowing to predict the beam steering angle by a phase modulation along the PRS is developed. Then, a new concept of metasurface allowing to steer the main antenna beam is proposed. It consists in applying a phase gradient by varying the effective index of the substrate that constitutes the PRS. The second part of this thesis is devoted to the design of an active metasurface that allows emulating different functionalities. First, the metasurface is utilized as a reflector with frequency and steering reconfigurability characteristics. Then, this metasurface is used as a reconfigurable polarizer where linearly polarized incident waves are converted into circularly polarized ones. Finally, the last study concerns the use of the active metasurface for the design of reconfigurablecylindro-parabolic and corner reflector antennas.
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Submitted on : Friday, November 30, 2018 - 1:14:07 PM
Last modification on : Wednesday, October 14, 2020 - 4:10:35 AM
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  • HAL Id : tel-01940585, version 1


Badr Eddine Ratni. Étude et conception d’antennes à base de métasurfaces destinées aux applications spatiales et aéronautiques. Electromagnétisme. Université Paris Saclay (COmUE), 2017. Français. ⟨NNT : 2017SACLS327⟩. ⟨tel-01940585⟩



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