27 Nov 2025
Job Information
- Organisation/Company
Université de Limoges- Department
DRH-RECHERCHE- Research Field
Physics- Researcher Profile
First Stage Researcher (R1)- Positions
Postdoc Positions- Country
France- Application Deadline
4 Jan 2026 - 23:59 (Europe/Paris)- Type of Contract
Temporary- Job Status
Full-time- Offer Starting Date
1 Apr 2026- Is the job funded through the EU Research Framework Programme?
Not funded by a EU programme- Is the Job related to staff position within a Research Infrastructure?
No
Offer Description
The work proposed for this post PHD position involves studying and developing switching circuits based on phase change materials (PCMs). The research will primarily consist of performing electromagnetic simulations of N-to-M switching circuits of increasing complexity. These calculations will allow for the sizing of these components and the design of a set of masks necessary for their implementation. These circuits will operate between 10 and 45 GHz to take advantage of the excellent performance of PCM switches at very high frequencies. Target applications include measurement instruments, antenna signal control, and test circuits for active components such as transistors. Several topologies of these switching matrices have already been studied in the laboratory, using coplanar propagation lines, which are simple to fabricate and easy to integrate with PCM switches.
However, as the complexity of the matrices increases, it becomes necessary to integrate elements such as RF line crossings, which are very difficult to implement using coplanar technology. We have demonstrated in the laboratory that it is possible to fabricate air bridges above the switching circuits, enabling the realization of these electrical crossings above the coplanar lines, in addition to the initial fabrication process, which does not need to be modified. The electrical behavior of these crossings will then be studied through electromagnetic simulations and optimized to achieve the best possible performance.
In a second phase, the postdoctoral researcher will fabricate the circuits designed in the first phase. They will be able to draw upon the experience acquired by the laboratory and the equipment at the fabrication facility. The circuits will be tested on the laboratory's measurement platform to evaluate the performance achieved using the technological elements proposed in this project.
Where to apply
- Website
- https://www.unilim.fr/recrutement-post-doctorant-composants-materiaux-pcm-circu…
Requirements
- Research Field
- Physics
- Education Level
- PhD or equivalent
Skills/Qualifications
Knowledge:
Proficiency in common microwave CAD software (Keysight Momentum, Ansoft HFSS, etc.)
Theoretical and practical knowledge of integrated microwave circuits with phase-change materials (PCMs)
Experience in a microwave research laboratory (PhD)
Fluency in French and English (spoken and written)
Skills:
Performing microwave measurements using probes (measurement execution, data processing)
Circuit fabrication in a cleanroom
Interpersonal Skills:
Ability to interact with a research team (researchers, technical staff)
Specific Requirements
Working location based in Limoges
- Languages
- ENGLISH
- Level
- Good
- Languages
- FRENCH
- Level
- Good
- Research Field
- Physics » Other
- Years of Research Experience
- 1 - 4
Additional Information
Eligibility criteria
According to French legislation, the applicant must have received a PhD degree no later than three years before the beginning of the contract
Selection process
CV, cover letter and copy of PhD degree to be sent by email mentioning reference of job offer at : drh-recrutement-recherche@unilim.fr
- Website for additional job details
https://www.unilim.fr/recrutement-post-doctorant-composants-materiaux-pcm-circu…
Work Location(s)
- Number of offers available
- 1
- Company/Institute
- University of Limoges-XLIM Labatory
- Country
- France
- City
- Limoges
- Postal Code
- 87000
- Street
- 123 Avenue Albert Thomas
- Geofield
Contact
- City
Limoges- Website
https://www.unilim.fr/recrutement-post-doctorant-composants-materiaux-pcm-circuits-rf/- Street
33 Rue François Mitterrand- Postal Code
87000
STATUS: EXPIRED
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