CDD Doctorant “Broadband and multi-band metasurface antennas (M/F)

Organisation/Company

CNRS

Department

Institut d’électronique et des technologies du numérique

Research Field

Engineering
Physics
Technology

Researcher Profile

First Stage Researcher (R1)

Country

France

Application Deadline

8 Mar 2024 – 23:59 (UTC)

Type of Contract

Temporary

Job Status

Full-time

Hours Per Week

35

Offer Starting Date

1 Apr 2024

Is the job funded through the EU Research Framework Programme?

Not funded by an EU programme

Is the Job related to staff position within a Research Infrastructure?

No

Offer Description

This thesis is part of the 5G Acceleration PEPR, which supports research on the development of advanced technologies for 5G and future networks. This interdisciplinary project will be carried out at IETR – UMR CNRS 6164 (www.ietr.fr ) and it will strongly involve two of IETR’s technological platforms:
– nR (NanoRennes) platform, https://www.ietr.fr/en/nr-nanorennes-platform with experience in microfabrication.
– M²ARS (Manufacturing Measurement Analysis of Radiating Systems) platform https://www.ietr.fr/en/m2ars-manufacturing-measurement-analysis-radiati… , with experience in advanced antenna metrology and prototyping.

A more efficient use of the available spectrum will not suffice to provide real-time data rates of around 100 Gbps foreseen for the future wireless networks beyond 5G, often referred to as 6G. Carrier frequencies beyond 100 GH, are therefore under study. More precisely, the 275-350 GHz band (already standardized) by IEEE exploits an atmospheric transmission window with attenuation <10 dB/km [2] and covers a total bandwidth that allows one to reach huge capacities with simple modulation schemes. Despite the existence of transmission windows, high-gain antennas must be used to compensate sub-THz path loss. Current solutions rely on conservative quasi-optical systems (mostly reflectors or lenses) and, generally, do not offer reconfiguration. Moreover, the bulkiness of such systems precludes their efficient integration on mobile platforms or urban furniture. To overcome these issues, a change of paradigm must be adopted: RF front-ends must not only satisfy the link budget over broad BWs, but be also amenable for integration on the chassis of vehicles or smart urban furniture.

The ambition of this project is to leverage metasurface (MTS) antennas to develop ultra-thin smart skins that meet these needs. MTS antennas consist of modulated impedance surfaces that gradually radiate the power carried by a surface wave launched by one port. Unfortunately, high-gain MTS antennas exhibit relatively narrow gain BWs. To overcome the physical bounds in the gain-BW product of single-port MTS antennas, we will explore MTS apertures with a limited number of input ports, through which we can sense the electromagnetic environment.

The PhD student will carry out a thorough literature review and the analysis and design of the modulat-ed MTS. Last but not least, special attention will be paid to finding the most appropriate materials and fabrication techniques. By the end of the project, at least one prototype will be fabricated and measured at IETR´s World-class testing facilities.

Required education level: Master or equivalent degree in electrical engineering, photonics or physics.
Required background: antenna theory, microwave engineering, antenna arrays, periodic structures, Terahertz radiation. Knowledge of French is not required.

[1] “IEEE standard for high data rate wireless multi-media networks–amendment 2: 100 Gb/s wireless switched point-to-point physical layer,” IEEE Std 802.15.3d-2017, 1-55 (2017).
[2] T. Nagatsuma, G. Ducournau, and C. Renaud, “Advances in terahertz communications accelerated by photonics” Nature Photon., 10, 371–379 (2016).
[3] D. González-Ovejero et al., “Additive manufactured metal-only modulated metasurface antennas,” IEEE Trans. Antennas Propag., 66(11), 6106-6114 (2018).
[4] M. Faenzi, D. González-Ovejero, and S. Maci, “Wideband active region metasurface antennas,” IEEE Trans. Antennas Propag., 68(3), 1261-1272 (2020).
[5] M. Faenzi, D. González-Ovejero, and S. Maci, “Overlapped and sequential metasurface modula-tions for bi-chromatic beams generation”, Appl. Phys. Lett., 118, 181902, (2021).

Requirements

Research Field

Engineering

Education Level

Master Degree or equivalent

Research Field

Physics

Education Level

Master Degree or equivalent

Research Field

Technology

Education Level

Master Degree or equivalent

Languages

FRENCH

Level

Basic

Research Field

Engineering

Years of Research Experience

None

Research Field

Physics

Years of Research Experience

None

Research Field

Technology

Years of Research Experience

None

Additional Information

Website for additional job details

https://emploi.cnrs.fr/Offres/Doctorant/UMR6164-DAVGON-017/Default.aspx

Work Location(s)

Number of offers available

1

Company/Institute

Institut d’électronique et des technologies du numérique

Country

France

City

RENNES

Geofield

Where to apply

Website

https://emploi.cnrs.fr/Candidat/Offre/UMR6164-DAVGON-017/Candidater.aspx

Contact

City

RENNES

Website

http://www.ietr.fr

STATUS: EXPIRED