Offre de thèse (CIFRE) : Étude d’antennes à déphasage mécanique pour des applications spatiales

Contexte

Au sein de la Direction Technique Ingénierie de l’Avion et des Emports à Dassault, le service EMIR (ElectroMagnétisme et InfraRouge) a pour mission principale de conduire les études dans le domaine de la furtivité et du rayonnement. L’accès Internet à bord d’un avion d’affaire peut s’effectuer uniquement à l’aide de liaisons SATCOM. Afin d’établir la communication entre l’avion et le satellite, on emploie de préférence des antennes réseau à grand gain.

Description

Le projet proposé par l’Institute of Electronics and Telecommunications of Rennes (IETR), UMR CNRS 6164 et la société Dassault Aviation vise à proposer et étudier de nouvelles topologies de dépointage du faisceau par des méthodes mécaniques inspirées de l’optique géométrique. Les travaux seront menés en bande Ka (aux alentours de 20 GHz-30 GHz) et comportera trois grandes phases :

  • Phase 1 : Etat de l’art et sélection de la technologie antennaire,
  • Phase 2 : Conception, réalisation et validation de la technologie retenue,
  • Etape 3 : Réalisation et optimisation des performances d’un démonstrateur final.

Toutes les informations à propos de la formation et des compétences requises sont disponibles dans ce document.

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PhD offer: Ultra-Low-Profile Electronically Steerable Transmitarray Antennas for SATCOM applications at Ka-band

Context

High gain electronically reconfigurable antennas with beam-steering, multi-beam, and beam-forming capability are required in a huge number of emerging applications for radar, sensing,
and communication systems (civil and military) typically ranging from C-band (4-8 GHz) to D-band (110-170 GHz). Classically composed of one or more radiating surfaces operating in
transmission mode and illuminated by one focal source or a focal array, transmitarrays (also called discrete lenses) are a recent cutting-edge antenna concept. Transmitarrays are realized using multilayer printed circuit technologies compatible with the integration of active devices (diodes, MEMS, NEMS, semi-conductors, etc.). These devices can be used to control the electromagnetic field on the array aperture. In this way, electronically reconfigurable antennas with beam-steering and beam-forming capability can be implemented.

Description

The PhD work, carried out in collaboration with the University of Rennes I, CEA-LETI and IETR (University of Rennes I), aims to make major innovation in modeling and design of transmitarray antennas for application in Ka-band (28 – 40 GHz); more specifically, it will address the development of numerical tools for the design of ultra-low-profile transmitarray, and the
design and demonstration of several transmitarrays with advanced functionalities, such as dual polarization, multi-beam and electronic reconfiguration.

All information about candidate profile and required skills can be found in this document.

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PostDoctoral offer: Low-profile steerable antenna in Ka-band

Context

Institut d’Électronique et de Télécommunications de Rennes (IETR), UMR CNRS 6164. Rennes, France.

Overview

Compact and efficient antenna architectures are key enabler solutions for on-board electromagnetic applications (telecommunications, radars, electronic warfare, etc.). Current solutions use cumbersome mechanical systems, or expensive but flat electronically steered phased arrays.

High data rates require the large bandwidth available at Ka-band but also extremely flat and steerable antennas to be integrated on the fuselage of moving platforms. The main technical and scientific challenge of the project is the development of a very low profile antenna architecture able to steer in a fast and efficient way its main beam over a large angular sector and wide band.

The main goal of the project is to develop a disruptive, modular and ultra-low-profile antenna architecture for the next generation of high data rate satellite communication systems for moving platforms.

Description

All information about the desired skills and experience can be found in this document.

Contact

Mauro ETTORRE, IETR, CRN CNRS
mauro.ettorre@univ-rennes1.fr
David GONZALEZ OVEJERO, IETR, CRN CNRS
david.gonzalez-ovejero@univ-rennes1.fr

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