Offre de poste : Enseignant-chercheur en Électromagnétisme

Contexte

L’ENAC est une des plus importantes grandes écoles ou universités aéronautiques en Europe. Le spectre des métiers auxquels l’ENAC forme est très large : des pilotes de ligne, des contrôleurs aériens, ou encore des ingénieurs et des professionnels de haut niveau capables de concevoir et faire évoluer les systèmes aéronautiques.

Les équipes de recherche de l’ENAC travaillent activement pour un transport aérien toujours plus sûr, efficace et durable. Parmi celles-ci, l’équipe TELECOM vise à améliorer les systèmes de Communications, Navigation et Surveillance (CNS) dans un contexte très exigeant en termes de performances et de sécurité. Cette équipe comprend trois axes dont l’axe ÉlectroMagnétisme et Antennes (EMA) qui a pour enjeu principal le développement des systèmes aéronautiques et le maintien de leurs performances dans des environnements électromagnétiques complexes, devant répondre à des exigences de miniaturisation et de combinaison de services.

L’axe EMA est un interlocuteur privilégié de l’aviation civile en France (DGAC) et en Europe en termes d’expertises et de recherches sur les problématiques propagation et antenne. Cet axe réalise également des projets de recherche avec et pour des industriels du spatial et de l’aéronautique.

Description

L’Enseignant-Chercheur recruté sera rattaché à l’axe EMA de l’équipe TELECOM. Il assurera une double mission d’enseignant et de chercheur dans le domaine de l’électromagnétisme et plus particulièrement des antennes et de la propagation.

Plus d’informations sur le profil recherché et les activités en charges sont disponibles dans ce document.

An english version of this offer is available in this document.

Contact

Pour candidater, envoyer avant le 14/08/2018 un CV comprenant une liste de vos publications et une lettre de motivation à :

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PhD offer: Compact Antennas with Radiation Constraints Manufactured using Additive Technologies for UAV and Nanosatellites Applications

Context

The interest in small-size autonomous platforms is growing rapidly. UAVs are for instance more and more used in the domains of media, agriculture and industry. Another example concerns the space industry where nanosatellites could yield a significant reduction in the launching and operation costs. These two domains share the common constraint of embedding complex systems on autonomous small-size platforms. This integration constraint is notably important for one of the key-elements of the system, i.e. the telecommunication antennas. These antennas have to be compact and of small weight in order to optimize the UAV airworthiness or the nanosatellite performances. Besides, they radiation pattern must be controlled.

Description

The main objective of this PhD thesis, available at two University labs. (ENAC and ISAE-Supaéro) is to design antennas integrated on small-size platforms, i.e. UAVs and nanosatellites, with strong constraints both in terms of size and radiation performances (radiation pattern and polarization). To do so, we will analyze the capabilities of 3D printed structures to obtain dielectric resonator antennas. The 3D printing will be used to locally control the material index of refraction. The design of such antennas is an innovation which may offer new degrees of freedom to optimize RF properties.

Others informations can be found in this document.

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PhD offer: Design of a very high-resolution imaging radar in W band for crowd monitoring: hardware and software issues

Context

Nowadays, mm-wave scanners already installed in some airports and used during the checking before boarding, only control one person at a time with a protocol which is not compatible with the monitoring a flow of moving people. Optical cameras cannot perform this control and a systematic body check is not really feasible. Such a system requires the design of very high-resolution millimeter wave radar that does not exist yet.

Description

The goal of this PhD thesis, available at the Laboratoire d’Electronique, Antennes et Télécommunications (LEAT, UMR7248, CNRS – Université Nice Sophia Antipolis)  , is to design very high-resolution imaging radar, which could be used for a wide range of monitoring issues. Among possible applications, we give a focus on the real-time monitoring of a flow of people crossing an access point (i.e. entrance of a public establishment, a concert hall, a stadium, …).

Others informations can be found in this document.

More details will be provided during the interview of the candidate.

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Offre de poste d’enseignant-chercheur en électromagnétisme appliqué

Contexte

L’Institut Supérieur de l’Aéronautique et de l’Espace ISAE-SUPAERO, à Toulouse, fort de son offre de formation d’ingénieurs, dont une en apprentissage, et de ses formations de masters, mastères spécialisés et doctorats est une institution de référence internationale pour la formation supérieure et la recherche dans le domaine aéronautique et spatial. L’ISAE-SUPAERO propose des enseignements pluridisciplinaires couvrant plusieurs domaines des sciences de l’ingénieur dont l’électronique, la physique et le traitement du signal qui constituent le périmètre en formation de ce poste.

Dans ce contexte de croissance de l’activité, associée au développement de moyens expérimentaux importants sur le site (ex. : chambre anéchoïque, banc micro-ondes/plasmas, …), l’ISAE-SUPAERO souhaite renforcer son potentiel de recherche au sein du DEOS sur la thématique des antennes et circuits micro-ondes exploitant des décharges plasmas et sa capacité d’intervention dans ses formations. Pour cela, l’ISAE-SUPAERO recherche un enseignant-chercheur ayant des compétences avancées en électromagnétisme appliqué aux antennes et circuits micro-ondes et apte à intervenir en formation dans les domaines de l’électronique, de la physique et du traitement du signal.

Description

L’enseignant-chercheur sera rattaché à l’équipe SCAN du DEOS de l’ISAE-SUPAERO. Il contribuera au développement et à l’animation de la recherche autour des antennes et circuits micro-ondes exploitant des décharges plasmas. Il assurera les missions fondamentales d’un enseignant dans son domaine de compétence et dans des domaines connexes. Il aura en outre pour mission d’entretenir et de développer les relations et les coopérations avec les partenaires académiques et industriels régionaux, nationaux et internationaux notamment dans le d’obtenir un soutien de ces partenaires (mécénat par exemple).

Toutes les informations à propos des missions et du profil recherché sont disponibles dans ce document.

Contact

 

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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.

Contact

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PhD offer: Novel antenna architectures for high speed wireless at 300 GHz

Context

A more efficient use of the available spectrum does not suffice to reach the bandwidths (BWs) of several tens of GHz required by future wireless systems. Thus, the use of the 275-350 GHz frequency range is the key to enable ultra-large BW wireless, owing to the following advantages: a) it has not yet been allocated; b) it presents atmospheric attenuation windows, which enable mid-range links and small cell deployment; c) the short wavelengths favor integration and packaging; and d) THz links are less susceptible than optical wireless to air turbulence and humidity, fog, smoke, and rain.

The main challenge in THz wireless communications consists in designing low-profile high-gain antennas efficiently coupled to continuous-wave THz sources at room temperature, to compensate for the propagation loss. Moreover, appropriate radiation patterns must be tailored for the antennas according to the needs of each THz wireless system.

The carrier in the transmitter will be generated using optical heterodyning by mixing two optical wavelengths on a photodiode, which presents an output electrical signal in the THz range, equal to the wavelength spacing of the two optical tones. This photonic approach is particularly convenient for communications due to its wide bandwidth, tunability and stability. It also allows one to stablish a direct bridge between 1.55μm data flows in optical fibers and THz radio.

Description

First, we will investigate the efficient radiation of the photocurrent generated in the photodetector, overcoming the impedance mismatch between antenna and photomixer. Second, appropriate radiation patterns must be tailored for the antennas in each THz wireless system. Hence, we will pursue photoconductive antenna arrays with agile radiation patterns.

The candidate must have worked at least 12 months outside France during the last 3 years, as required by Britany Region.

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

Contact

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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.

Contact

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PhD offer: Universal Launcher Antenna

Context

Communication links onboard launchers consist in 3 main functions: Telecommand, Trajectography and Telemetry. Each function currently operates over a dedicated frequency range within [0.4 GHz ; 6 GHz] and a specific antennas network is used for each one via different concepts.

Such an implementation is not optimal from an industrial point of view since it requires management of several antenna definitions with impacts on configuration control, supply chain, integration phase and cost with respect to the launchers needs.

Therefore a unique antenna concept operating over the whole frequency range [0.4 GHz ; 6 GHz] for all communication links could be an universal solution with a high added value for space applications. Developing such a solution for future launchers is the subject of the proposed PhD.

Description

This PhD offer is available at the Institute of Electronics and Telecommunications of Rennes (IETR – UMR CNRS 6164), France.
All information about objectives and required skills can be found in this document.

Contact

Mauro ETTORRE, IETR, CRN CNRS
mauro.ettorre@univ-rennes1.fr

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PhD offer: Low profile and broadband antennas for high speed wireless at 300 GHz

Context

A more efficient use of available spectrum does not suffice to reach the ultra-large bandwidths (BWs) required by wireless systems beyond 5G, and the use of frequencies in the Terahertz (THz) gap is the key to enable ultra-large BW wireless. The frequency range between 275 and 350 GHz is particularly convenient, owing to the following advantages: a) it has not yet been allocated; b) it presents atmospheric attenuation windows, which enable mid-range links and small cell deployment; c) the short wavelengths favor the design of on-chip antennas, integration and packaging; and d) THz links are less susceptible than optical wireless to air turbulence and humidity, fog, smoke, and rain.

One of the challenges in THz wireless communications consists in designing low-profile high-gain antennas efficiently coupled to continuous-wave THz sources at room temperature, to compensate for the propagation loss. Moreover, appropriate radiation patterns must be tailored for the antennas in each THz wireless system. For instance, directive pencil beams will suffice for point-to-point links, whereas small cells will demand a multi-beam system with broader angular coverage.

Description

This PhD offer is available at the Institute of Electronics and Telecommunications of Rennes (IETR), France.
All information about objectives and required skills can be found in this document.

Contact

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

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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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