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CEA Tech
PhD position - Tunable Metasurface
CEA Tech
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JOB DETAILS
Published: 2 months ago
Application deadline: Oct 31
Location: Grenoble, France
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PhD position - Tunable Metasurface

SL-DRT-19-0406

RESEARCH FIELD

Electronics and microelectronics - Optoelectronics

ABSTRACT

Metamaterials have been studied by the scientific community for several years with a particular focus on 2D or 3D meta shapes. In the antenna field, these structured materials have been mainly used as magnetic surfaces, filtering surfaces for surface waves or the antenna itself. The main disadvantage of these materials is its narrow band behaviour. Recent research has shown that it is possible to modify the response of metasurfaces by adding a film sensitive to a control voltage to the patterns or by arranging the active components between them.More recently, CEA Leti has developed a new approach, through a thesis, to modify the performance of a metasurface, by inserting control devices on its rear surface as well as on the feeder. The proposal, made here, is in line with the continuity of this work, initiated within the LAPCI laboratory, with a specific development around massively tunable metasurfaces. Indeed, it has been demonstrated that the metasurface/feeder pair should be jointly designed/optimized when the metasurface and/or feeder were compact or even miniature.The purpose of this thesis is to study this interaction through the notion of load impedance and to realize a final demonstrator of a reconfigurable metasurface of several hundred active elements.The main interest is to consider the use of ultra-compact adjustable metamaterials in order to miniaturize the size of an antenna placed near a reflecting plane.The second major point concerns the possibility of frequency-dependent control of the complete device (by nature very narrow band) over a frequency band of several tens of percent.During this thesis, the candidate will develop the theoretical modeling of the proposed device and validate the expected performances through 2D and/or 3D electromagnetic simulation campaigns. He/she will be in charge of having the selected demonstrators carried out and will carry out measurements of the devices in the test facilities of CEA-Leti and/or CNES (anechoic chamber).The candidate will be integrated into the Antenna, Propagation and Inductive Coupling Laboratory in Grenoble. He/she will be part of the research team (permanent, doctoral and non-permanent) and will be supervised by a research engineer from the laboratory. The candidate will be required to present his or her work at national and international conferences and symposiums.

LOCATION

Département Systèmes

Laboratoire Antennes, Propagation, Couplage Inductif

Grenoble

CONTACT PERSON

PINTOS Jean-François

CEA

DRT/DSYS/STSF/LAPCI

CEA LetiMinatec Campus17 Rue des Martyrs38054 Grenoble Cedex 9

Phone number: 0438786400

Email: jean-francois.pintos@cea.fr

UNIVERSITY / GRADUATE SCHOOL

Telecom ParisTech

Electronique, Electrotechnique, Automatique, Traitement du Signal (EEATS)

START DATE

Start date on 01-06-2019

THESIS SUPERVISOR

BORIES Serge

CEA

DRT/DSYS/STSF/LAPCI

CEA/GRENOBLE 17 rue des Martyrs38054 Grenoble CEDEX 9

Phone number: 04 38 78 18 63

Email: serge.bories@cea.fr

« The age limit is 26 years for PhD offers and 30 years old for post-doc offers. »

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