PostDoctoral offer: near-field thermal radiative heat transfer

Context

The EFINED ( Energy-Filtering Non-Equilibrium Devices ) project addresses innovative energy-filtering nano-devices for information and communications technology (ICT), involving bolometers, thermionic nano-junctions and scanning probe microscopy technologies. At the intersection of phononics, photonics, nanoscale electro-thermal devices and molecular engineering, it aims at generating new knowledge and understanding at the fundamental limits of nanoscale energy management, and at demonstrating novel proof-of-concept non-equilibrium phonon-engineered electrothermal devices in real applications.

The project, which will run until 2021, involves partners in Finland, Switzerland, Germany and UK.

Description

The Centre for Energy and Thermal Sciences, Lyon, France (CETHIL) opens a position of post-doctoral researcher in the area of nanoscale thermal radiation. The work will be performed in the frame of the European collaborative project ‘EFINED’ financed by the H2020 program, which gathers the strengths of 5 partners on the topics of energy management down the molecular scale and low temperature.

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

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PhD offer: Mechanobiology assisted by Surface Acoustic Wave (SAW) for medical diagnosis assistance

Context

Mechanobiology is an emerging field of science at the interface of biology and engineering. A major challenge in this field is the understanding of mechanotransduction, i.e. the molecular mechanisms by which cells sense and respond to mechanical signals. This physical interaction will modify the mechanical properties of cells and tissues, which contribute to the development of the cell, its differentiation and to the development of the disease. Hence, cell’s viscosity and elasticity are important parameters that must be characterized.

S.U. Senveli et al. conducted the most recent work in the field of surface acoustic wave (SAW) biosensors for the characterization of tumour cells. They also managed to differentiate tumour cells in terms of elasticity modulus. Moreover, we can note, the work of Stamp et al. which demonstrated that dynamic stimulation of bone tumour cells (SaOs-2) with 159 MHz (Rayleigh-SAW) ultrasound accelerates the tissue healing process by stimulating cell migration and growth.

SAW appear to be a relevant and promising characterization method for the field of mechanobiology and for future medical treatments.

Description

This PhD offer is available at the Institut Jean LAMOUR (UMR 7198), University of Lorraine – CNRS, Micro et Nanosystems Team – Campus ARTEM, NANCY (ijl.univ-lorraine.fr).

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

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PostDoctoral offer: MIT-Food, Microwave Imaging Technology for Food Contamination Monitoring

Context

Foreign body contamination in food is one of the major sources of complaints against food manufacturers, and can lead to injury, loss of brand loyalty and large recall expenses. Different technologies, such as X-ray or infrared techniques, are currently applied to detection systems used for food inspection, but physical contamination, with e.g. wood, plastic, metal and glass, is still present in food. In the last years, possibly due to the increasing automation of supply chains, the occurrence of metal incidents has risen and incidents with plastics and glass remain significant.

For this reason, there is the need to develop new technologies capable to address the still unmet needs of food industry. In the MIT-food project, we will investigate the use of the microwave imaging (MWI) technology for food contamination monitoring. MWI is able, through low-power electromagnetic (EM) waves at microwave frequencies, to non-invasively penetrate an object and provide a spatial map of its EM properties. Such a capability is herein relevant because of the intrinsic difference in such properties between food and contaminants.

Description

A one-year post-doctoral research position at the Dept. of Electronics and Telecommunications (DET), Politecnico di Torino, Torino, Italy (polito.it) expected to become available in the second quarter of 2018.

The main objective of the MIT-Food project is to realize a prototypal device able to identify foreign objects in food using microwave imaging. This technology will be non-destructive and contactless, safe for operators (thanks to the use of low-power, non-ionizing radiations), able to provide inline monitoring in food manufacturing (thanks to tailored processing algorithms and their hardware implementation), easy to use and cost-efficient (thanks to low-cost technologies).

An ideal candidate would have a good background in electromagnetics, antenna design, and programming.
Previous experience in microwave imaging technology are preferable.

All the details of the project are in http://www.researchers.polito.it/en/success_stories/progetti_metti_in_rete/microwaves_to_monitor_food_contamination

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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.

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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.

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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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PhD offer: Millimeter-wave technologies for biomedical electromagnetics : multi-physics microdosimetry

Context

Millimeter-wave (MMW) technologies are increasingly used for various applications. In particular, they have been used for high data rate communications [> 5 Gb/s] and 60-GHz technologies are expected to be integrated in the near future in the next generation mobile systems. Besides, it was suggested that MMW can be used for a number of biomedical applications, including remote monitoring of wounds and non-invasive detection of glucose levels. Recently, our research team has demonstrated the possibility of selective focusing of heating in cutaneous and sub-
cutaneous layers by means of MMW for thermal treatments. This opens a door to new potential applications of MMW in the field of biomedical electromagnetics, including selective targeting of skin cancers.

Description

The main purpose of this PhD research project, available at the Institute of Electronics and Telecommunications of Rennes (IETR), UMR CNRS 6164 in a close collaboration with experts from the Institute for Research on Environmental and Occupational Health (IRSET), Rennes, France, is to analyze EM field and temperature distributions at cellular level in order to gain an insight into local micro- and submm-scale phenomena occurring during exposure of the human body to MMW.

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

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PhD offer: Modeling and characterization of high-speed interconnects (antennas and transmission lines) at millimeter waves for automotive applications

Context

APTIV is a high-technology company that integrates safer, greener and more connected solutions for the automotive and transportation sectors. To fulfill the needs of our R&D center located in Epernon, France, we are looking for a candidate to prepare a PhD thesis on high-speed transmissions at millimeter waves.

Description

You will be recruited for 3 years as a researcher / R&D engineer at the R&D center of APTIV Connection Systems and will prepare a PhD thesis in collaboration with the Institut d’Electronique et de Télécommunications de Rennes (IETR). This research work will be carried out both at IETR, Rennes, France and at APTIV Connection Systems, Epernon, France.

With the support of our R&D teams, you may interact tightly with various manufacturers to develop experimental prototypes. This research work will contribute to the development of computer-aided design tools for high-speed transmissions and interconnects at millimeter-waves for automotive applications.

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

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PhD offer: Fast and Accurate Iterative Physical Optics Approach for the Modeling of Electrically Huge Platforms

Context

The Iterative Physical Optics (IPO) is a High Frequency method for the electromagnetic analysis, which is inherently parallelizable, thus providing an unrivaled fast tool for the description of large platforms, prediction of RCS, antenna siting, etc. Since based on Physical Optics approximation, though augmented by its iterative scheme, IPO is an approximate method that is not capable to accurately describe effects like edge/vertex diffraction or creeping waves (Fock’s currents).

Description

To enhance IPO accuracy, this PhD programs aims to combine it with an exact method, i.e., the Electric Field Integral Equation (EFIE), which is cast in a similar iterative algorithm through a Calderon preconditioning.

The candidate will be equally hosted by IETR (Institut d’Électronique et de Télécommunications de Rennes, France) and LEA (Applied Electromagnetic Laboratory, Siena, Italy), during the timeframe of the PhD program.

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

Contact

The main supervisors of the candidate will be:

 

 

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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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