Sorbonne University in Paris, France.
The Laboratory of Electronics and Electromagnetism (L2E) is a research unit of Sorbonne University (SU). The research activities of L2E aim at
- developing methods of analysis and behavioral models, explaining physical phenomena of electromagnetic wave propagation in complex, multi-scale and multi-physical environments;
- proposing innovative or breakthrough electronic solutions to meet specific needs expressed in the telecommunications, health, defense, space and automotive industries.
The L2E's research activities are organized around three themes, including the "EMRAD" theme, for Electromagnetic Modeling for RAdar Detection and EMC Applications. The objectives of the EMRAD theme concern the development and exploitation of models of electromagnetic scattering by forest and urban environments, as well as the design and optimization of antennas for over-the-horizon HF radar applications. It is in this context that the job offer is made.
The L2E is engaged, with several french partners (CISTEME and IEEA, Onera and XLIM laboratory), since January 2018, in a contract DGA ASTRID Maturation entitled "Surface Wave HF Radar Simulator" (SimROS). The SimROS project aims at developing software for the design and identification of HF radar performance for maritime surveillance. This project follows a previous DGA ASTRID project "PROPHETE" in which some partners of SimROS (XLIM and IEEA) were already involved.
The SimROS project is based on the developing and the interfacing of numerical bricks handling the different steps in a radar operation:
- selection and generation of the transmitted signal;
- computation of the radiation of the transmitting antennas;
- computation of the wave propagation in the scene of interest (taking into account the geographic relief and the sea state);
- computation of the interaction with a maritime target;
- computation of the reflected signal to the receiving antennas;
- echo analysis and synthesis of the Doppler-distance image.
The L2E is particularly involved in calculating the radiation of transmitting antennas and computing the interactions with the target. The work related to this job offer focuses on this second task.
It is known that the HF propagation is charaterized by two contributions to electromagnetic waves: a contribution in sky waves, using ionospheric reflection, and a contribution in surface waves, using the sea surface as a propagation medium. These two components have different electromagnetic properties and therefore interact differently with maritime targets. In particular, the structure of surface waves is not that of a plane wave, a hypothesis commonly assumed to define and calculate the Radar Cross Section (RCS) of targets. Thus, it is obvious that the study of the HF maritime surveillance radar requires a review of the methodology for calculating the RCS of ships, or even the redefinition of the concept of RCS, particularly for surface waves.
The work will be organized around the following points:
- participation to the bibliographic analysis of papers about the RCS: definition, classical and more recent approaches, analytical or numerical methods for calculating the scattering of electromagnetic waves by target in HF band, experimental methods for measuring the RCS;
- involvement with the team in the definition of a new RCS, separating the contributions in sky and surface waves;
- implementation of the computation method of this RCS.
Training – Required Skills
The candidate must hold a PhD in Science, with a specialization in electronics. The candidate must be able to demonstrate good experience in the following areas:
- electromagnetism, wave propagation, antennas and radiation;
- numerical methods for electromagnetic modeling (finite differences, method of moments...);
- electromagnetic simulation, expertise in the use of commercial softwares like FEKO or CST;
- programming (a knowledge of Fortran or Python would be appreciated);
- good expertise of the English language in writing and speaking.
Beginning of the contract
Gross monthly pay
The applicant must be of European nationality
Sorbonne Université - L2E
4 place Jussieu – BC 252
75005 Paris, France
Muriel Darces – +33 (0)1 44 27 27 59 – firstname.lastname@example.org
Marc Hélier – +33 (0)1 44 27 43 72 – email@example.comApprenez-en davantage
|Intitulé||12-months post-doctoral job offer|
|Job location||21 rue de l’École de médecine, 75006 Paris|
|Publié||octobre 30, 2019|
|Date limite d'inscription||Non Spécifiée|
|Types d'emploi||Post doc  |
|Domaines de recherche :||Électromagnétisme,   Physique appliquée,   Électronique  |