Post-doctoral position M/F on optimization of directive antennas
New
- Researcher in FTC
- 12 months
- Doctorate
This offer is available in English version
This offer is open to people with a document recognizing their status as a disabled worker.
Offer at a glance
The Unit
XLIM
Contract Type
Researcher in FTC
Working hHours
Full Time
Workplace
87060 LIMOGES
Contract Duration
12 months
Date of Hire
01/01/2027
Remuneration
between 3041.58€ and 4216.70€ gross salary each month
Apply Application Deadline : 23 November 2026 23:59
Job Description
Missions
As part of the OPALE collaborative project – 'Obturateurs et panneaux rayonnants reconfigurables' – between the CNRS (Centre National de la Recherche Scientifique) and the AID (gence Française d'Innovation et de Défense), French academic research laboratories (CEA LETI, ICMCB, IETR, Telecom Paris and XLIM) are joining forces to propose innovative architectures for reconfigurable devices (attenuators/shutters, low-profile and highly directional antennas) with a view to surpassing the current state of the art. The successful candidate will be responsible for modelling and optimising the number of control elements in a multi-channel antenna system, with a view to assessing the potential for minimising the energy consumption of such systems.
Activity
As part of the OPALE project, a 12-month post (with the possibility of extension) is available for postdoctoral research into strategies for feeding array-type directional antennas. More specifically, the aim is to assess the feasibility of under-feeding these antennas by strategically selecting the position and weights to be applied to radiating elements in several antenna architectures developed as part of the project. This study will require the development of optimisation methods, which may draw on various state-of-the-art works and may employ strategies such as neural networks or 'physics-informed neural networks'. Beyond the radiating panel aspect alone, the study must consider the impact of feeding choices on any potential active chains that may be connected upstream.
Your Profil
Skills
La personne recrutée (post-doctorant ou ingénieur de recherche) sera de préférence titulaire d'un doctorat valide avec une spécialisation en électromagnétisme, antennes, micro-ondes, électronique haute fréquence. Une solide connaissance de la conception de dispositifs, de l'électromagnétisme, de la théorie des circuits et de l'utilisation de logiciels électromagnétiques commerciaux (Ansys-HFSS ou CST Microwave Studio, Keysight ADS) seront requis. Une connaissance des problématiques liées aux grands réseaux d'antennes et à leur mise au point sera appréciée. Un bon niveau d'anglais écrit et parlé est requis.
Your Work Environment
The main objective is to define a method for calculating the electromagnetic performance of an antenna, whilst reducing the number of excitation channels required. Among the possible options, quantification of phase states is considered as a minimum, but the focus should instead be on a strategy to reduce the number of channels, in order to evaluate the following characteristics: gain as a function of the antenna's radiating area, active reflection coefficient, and isolation level between channels. The study will initially be carried out on conventional array models to define reference cases, and will then be applied to two antenna architectures developed within the OPALE project. The results obtained should help the consortium to define the most suitable design for each type of antenna, in collaboration with the various teams. The research work will cover the following stages:
- Research into the state of the art regarding methods for thinning out directive arrays and defining their limits of application;
- Conducting an initial analysis on reference arrays, using algorithms to be selected and applied to the study;
- Development of optimisation methods to adapt them to the project's antennas and their specific characteristics;
- Prospective study on the impact of reducing the number of controls on system aspects that affect performance (taking into account a specific EIRP or G/T level);
- Drafting of summary documents and dissemination of the results.
Constraints and risks
Work on computer screen and laptop
Compensation and benefits
Compensation
between 3041.58€ and 4216.70€ gross salary each month
Annual leave and RTT
44 jours
Remote Working practice and compensation
Pratique et indemnisation du TT
Transport
Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€
About the offer
| Offer reference | UMR7252-CYRMEN-003 |
|---|---|
| CN Section(s) / Research Area | Micro and nanotechnologies, micro and nanosystems, photonics, electronics, electromagnetism, electrical energy |
About the CNRS
The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.
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