Comptes Rendus Physique

Thibaut Caillet

Compatibility between EESS (passive) in band 23.6–24 GHz and 5G in band 24.25–27.5 GHz

Amélie Jarnac

Vincent L. R. Jacques

Laurent Cario

Etienne Janod

Steven L. Johnson

Sylvain Ravy

Claire Laulhé

Photoinduced charge density wave phase in 1T-TaS$_2$: growth and coarsening mechanisms

Oliver Iff

Marcelo Davanco

Simon Betzold

Magdalena Moczała-Dusanowska

Matthias Wurdack

Monika Emmerling

Sven Höfling

Christian Schneider

Hyperspectral study of the coupling between trions in WSe$_2$ monolayers to a circular Bragg grating cavity

Emmanuel Clouet

Baptiste Bienvenu

Lucile Dezerald

David Rodney

Screw dislocations in BCC transition metals: from <i>ab initio</i> modeling to yield criterion

David Fernández Castellanos

Stéphane Roux

Sylvain Patinet

Insights from the quantitative calibration of an elasto-plastic model from a Lennard-Jones atomic glass

Oguz Umut Salman

Roberta Baggio

Brigitte Bacroix

Giovanni Zanzotto

Nikolai Gorbushin

Lev Truskinovsky

Discontinuous yielding of pristine micro-crystals

Emmanuelle Conil

Jean-Benoît Agnani

Comptes Rendus
Physique
Joe Wiart
Foreword
Volume 22, issue S1 (2021), p. 1-2
<https://doi.org/10.5802/crphys.73>
Part of the Special Issue:URSI-France 2020 Workshop
Guest editor: Joe Wiart (LTCI, Télécom Paris, Institut Polytechnique de Paris,
Institut Mines-Télécom, France)
© Académie des sciences, Paris and the authors, 2021.
Some rights reserved.
This article is licensed under the
Creative Commons Attribution 4.0 International License.
http://creativecommons.org/licenses/by/4.0/
Les Comptes Rendus. Physique sont membres du
Centre Mersenne pour l’édition scientifique ouverte
www.centre-mersenne.org
Comptes Rendus
Physique
2021, 22, n S1, p. 1-2
https://doi.org/10.5802/crphys.73
URSI-France 2020 Workshop / Journées URSI-France 2020
Foreword
Joe Wiart a
a LTCI, Telecom Paris, Institut Polytechnique de Paris, Institut Mines Telecom, France
E-mail: Joe.wiart@mines.org
The year 2020 saw the commercial opening of fifth generation mobile phone networks. Since
the 1990s, generations of mobile networks have followed one another every 10 years. The second
generation, GSM, has democratized access to wireless mobile telephony. For the first time it
was possible to be far from home while remaining close to family. The third generation in the
2000s and then 4G in the 2010s enabled mobile Internet access, first at moderate speed then
at high/very high speed. These generations had in common that they had the human person
at the center of uses. With 5G, wireless networks will have been designed for the first time
from the outset with the aim of making possible both person-to-person, person-to-machine
and machine-to-machine communications, giving potential access to a plethora of data-based
services. The studies that have enabled the deployment of 5G are opening up new challenges.
The technological developments specific to this generation, the frequency rise, the foreseeable
evolutions that will require going beyond the framework of 5G towards the next generation, will
continue to stimulate significant efforts and new lines of research, involving the academic world
and industry. The deployment of this new generation also raises many societal questions linked
on the one hand to the energy consumption of 5G and on the other to electromagnetic waves and
associated exposure. The question of possible health impacts has given rise to numerous debates
where the perception of risk has been favored at the expense of an objective assessment of the
risk and of the actual exposure.
In view of all these challenges, opportunities and questions, URSI France decided in 2019 to
organize its 2020 annual scientific workshop on the theme of “Networks of the future: 5G and
beyond”, on the campus of Telecom Paris (Institut Polytechnique de Paris), Palaiseau, March
11–13, 2020.
This special issue is organized in 8 papers covering different aspects and challenges of future
networks. The first papers deal with the exposure induced by 5G system.
The paper entitled “In-situ evaluation of exposure induced by 5G antennas in the 3.4–3.8 GHz
band” is written by E. Conil and J. B. Agnani. It describes exposure measurements performed in
the vicinity of four pilot sites. The authors point out variations in the levels of exposure depending
on use of network resources and they propose a new indicator of exposure.
The second one, “Numerical modeling of downlink electromagnetic wave exposure generated
by 5G beamforming antennas”, authored by N. Noé and F. Gaudaire, analyses scenarios used for
numerical modeling of electromagnetic wave exposure to beamforming antennas. The authors
underline the influence of the environment around the antennas on the distribution of the
electric field.
ISSN (electronic) : 1878-1535 https://comptes-rendus.academie-sciences.fr/physique/
2 Joe Wiart
The third paper, entitled “On the Measurement Procedures for the Assessment of the Specific
Absorption Rate (SAR) from MIMO Cellular-Equipment of Fast Varying Relative Phases”, is au-
thored by M. Teniou, M. Ramdani, O. Jawad, T. Julien, S. Pannetrat and L. Aberbour. This paper
introduces a measurement methodology for the evaluation of the specific absorption rate (SAR)
of MIMO systems (multiple-input and multiple-output), in which the relative phases between
the antennas are rapidly changing over very short durations.
The fourth paper, entitled “Investigating Sub-THz PHY Layer for Future High-data-rate Wire-
less Backhaul”, is authored by G. Gougeon, Y. Corre, M. Z. Aslam, S. Bicaïs and J.-B. Doré and is
dedicated to future networks. It analyses the feasibility and characteristics of the in-street sub-
THz mesh backhauling. The study relies on a highly realistic simulation of the physical layer per-
formance, based on a detailed geographical representation and on ray-based propagation mod-
elling, for a new modulation scheme resistant to phase noise impairments.
The fifth paper, entitled “Multi-beam Modulated Metasurface Antenna for 5G Backhaul Appli-
cations at K-band”, by J. Ruiz-García, M. Faenzi, A. Mahmoud, M. Ettorre, P. Potier, Ph. Pouliguen,
R. Sauleau and D. González-Ovejero, explores the use of a new modulated metasurface (MTS) an-
tenna topology as a solution for wireless backhaul at K band. The authors show that employing a
modulated MTS, combined with the compactness of a pillbox approach, leads to a high-gain and
low-profile antenna.
The sixth paper “Bandpass NGD function design for 5G microwave signal delay synchroniza-
tion application” by S. Lalléchère, L. Rajaoarisoa, L. Clavier, R. Sanchez Galan and B. Ravelo, in-
troduces a design method of simple bandpass (BP) NGD topology. The authors show that the BP
NGD circuit can be useful for the improvement of phase linearity and group delay equalization
of future 5G microwave devices.
The seventh paper, entitled “Enhanced Integrated Multiband HPM Radiator, combining a
Hyperband Source with a High-Q Frequency Selective Surface” is authored by F. Albarracin-
Vargas, F. Vega, C. Kasmi, D. Martinez and L. Ole Fichte. This work presents advances on the
development of a resonant radiator and shows also that the system analysis methodology can
be applied to other FSS geometries.
The last paper, by T. Caillet and entitled “Compatibility between EESS (passive) in band
23.6–24 GHz and 5G in band 24.25–27.5 GHz”, describes the studies undertaken by several
European countries for the protection of frequency bands used by satellites for the observation
of the Earth. The elements provided in this document are the basis of the European position for
WRC-19 on the protection of passive EESS in 23.6–24 GHz.
We hope that this special issue offers you the possibilities to have a wide view on the future
networks, existing questions and challenges.
Joe Wiart
Président du Comité scientifique des
Journées URSI-France 2020
France
Joe.wiart@mines.org
C. R. Physique — 2021, 22, n S1, 1-2


In-situ evaluation of exposure induced by 5G antennas in the 3.4–3.8 GHz band

Xiaoyi Sun

Shuaishuai Sun

Chong-Yu Ruan

Toward nonthermal control of excited quantum materials: framework and investigations by ultrafast electron scattering and imaging

Atac Imamoglu

Ovidiu Cotlet

Richard Schmidt

Exciton–polarons in two-dimensional semiconductors and the Tavis–Cummings model

Etienne Perret

Chipless labels detection by backscattering for identification and sensing applications

Not a member yet

Compatibility between EESS (passive) in band 23.6–24 GHz and 5G in band 24.25–27.5 GHz

Photoinduced charge density wave phase in 1T-TaS $_2$ : growth and coarsening mechanisms

Hyperspectral study of the coupling between trions in WSe $_2$ monolayers to a circular Bragg grating cavity

Screw dislocations in BCC transition metals: from <i>ab initio</i> modeling to yield criterion

Insights from the quantitative calibration of an elasto-plastic model from a Lennard-Jones atomic glass

Discontinuous yielding of pristine micro-crystals

In-situ evaluation of exposure induced by 5G antennas in the 3.4–3.8 GHz band

Toward nonthermal control of excited quantum materials: framework and investigations by ultrafast electron scattering and imaging

Exciton–polarons in two-dimensional semiconductors and the Tavis–Cummings model

Chipless labels detection by backscattering for identification and sensing applications

2,036

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