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119 results on '"Sauleau, R."'

7. Cavity-Backed Broadband Microstrip Antenna Array for Photonic Beam Steering at W Band

Author

Taillieu, J., Sauleau, R., Alouini, M., David González Ovejero, Institut des Fonctions Optiques pour les Technologies de l'informatiON (Institut FOTON), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Centre National de la Recherche Scientifique (CNRS), Institut d'Électronique et des Technologies du numéRique (IETR), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), European Union, French region of Brittany, Ministry of Higher Education and Research, Rennes Metropole, Conseil Departemental 35 through CPER Project SOPHIE/STIC Ondes, French government [ANR-10-LABX-07-01], and ANR-10-LABX-0007,COMIN Labs,Digital Communication and Information Sciences for the Future Internet(2010)

Subjects
[SPI]Engineering Sciences [physics], photonic carrier generation, Beam steering, sub-mm waves, cavity backed, stacked patch
Abstract

International audience; We present here the design of a broadband antenna array for photonic beam-steering at W-band. The array unit-cell consists of two stacked microstrip patches that are cavity backed, and fed by aperturecoupling using an hourglass slot. The unit-cell shows a simulated impedance bandwidth of 37% for SWR

Published
2022

8. Higher-Symmetries for Broadband Reflecting Luneburg Lenses at Ka-band

Author

Bilitos, C., Ruiz-Garcia, J., Sauleau, R., Martini, E., Maci, S., David González Ovejero, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), Università degli Studi di Siena = University of Siena (UNISI), Agence de l'Innovation de Defense (AID), European Union through the European Regional Development Fund (ERDF), French Region of Brittany, Conseil Departemental 35, through the CPER Project STIC Ondes, Ministry of Higher Education and Research, and Rennes Metropole

Subjects
beam-forming, Ka-band, [SPI]Engineering Sciences [physics], planar antennas, Metasurface, higher symmetries, Reflecting Luneburg Lens
Abstract

International audience; This paper reports the application of higher symmetries to the design of a Reflecting Luneburg Lens (RLL) with broadband response. RLLs consist of two circular parallel plate waveguides (PPWs) vertically stacked. The bottom PPW is filled with an azimuthally symmetric graded index (GRIN) medium. Owing to this GRIN medium, the wave launched by a primary feed in the bottom PPW is collimated in the top one, so that a plane wave with a different propagation direction is generated for any azimuthal position of the source. In this work, the GRIN medium in the bottom PPW is implemented by higher symmetry unit-cells consisting of metallic inclusions. This type of unit-cell achieves the required effective refractive index profile with reduced frequency dispersion, thus increasing the operational bandwidth of the lens. The proposed architecture constitutes a low-profile beam-forming solution that also provides complete azimuthal scanning in a wide frequency range. Moreover, it remains completely metallic, thus benefitting from structural robustness and reduced losses.

Published
2022

21. Tetragonal tungsten bronze phase thin films in the K–Na–Nb–O system: Pulsed laser deposition, structural and dielectric characterizations

Author

Aspe, B., primary, Demange, V., additional, Waroquet, A., additional, Castel, X., additional, Gautier, B., additional, Simon, Q., additional, Albertini, D., additional, Zaghrioui, M., additional, Nadaud, K., additional, Députier, S., additional, Gouttefangeas, F., additional, Sauleau, R., additional, and Guilloux-Viry, M., additional

Published
2020
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23. Excitation d'une Unique Onde de Fuite dans une Antenne Fabry- Perot Permettant la Génération de Polarisation Circulaire sur une Large Bande

Author

Antoine Calleau, María García-Vigueras, Legay, H., Sauleau, R., Ettorre, M., Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Thales Alenia Space (TAS), THALES, Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Thales Alenia Space [Toulouse] (TAS), and THALES [France]

Subjects
[SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, [SPI.TRON]Engineering Sciences [physics]/Electronics
Abstract

International audience; Une méthode innovante de conception d'antenne à résonateur de Fabry-Perot polarisée circulairement est présentée ici. La méthode proposée repose sur une analyse à base de fonctions de Green. Il est prouvé qu'un unique mode de type onde de fuite est suffisant pour générer la polarisation circulaire sur une large bande. Nos résultats montrent que le rapport axial ne varie pas avec la valeur maximale de directivité et une antenne présentant une bande passante en rapport axial de 23% est proposée, validant ainsi les outils numériques développés. L'approche présentée est particulièrement intéressante pour le développement d'antennes à faible gain, rayonnant un champ polarisé circulairement sur une large bande de fréquence.

Published
2019

24. Circularly-Polarized Metasurface Antenna in Cavity for GNSS Applications

Author

García-Gámez, L., Bernard, L., Sauleau, R., Collardey, Sylvain, Mahdjoubi, K., Pouliguen, P., Potier, P., Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut franco-allemand de recherches de Saint-Louis (ISL), DGA-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'Armement (DGA), Université de Nantes (UN)-Université de Rennes 1 (UR1), Jonchère, Laurent, Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), DGA-Matériaux et Nanosciences Grand-Est (MNGE), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
metasurface, [SPI]Engineering Sciences [physics], GNSS, [SPI] Engineering Sciences [physics], circular polarization, antenna in cavity, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

25. Washing Durability of PDMS-Conductive Fabric Composite: Realizing Washable UHF RFID Tags

Author

Simorangkir, RBVB, Le, D, Bjorninen, T, Sayem, ASM, Zhadobov, M, Sauleau, R, Simorangkir, RBVB, Le, D, Bjorninen, T, Sayem, ASM, Zhadobov, M, and Sauleau, R

Abstract

In this letter, we present experimental investigations on washing durability of a polydimethylsiloxane (PDMS)-conductive fabric composite to validate its applicability for the realization of flexible wearable antennas that can withstand multiple washing cycles. For this purpose, we designed an ultrahigh-frequency (UHF) radio frequency identification (RFID) passive tag antenna and fabricated several prototypes using such materials combination. Understanding the challenge of having a robust integration of a lumped electronic component (e.g., RFID IC) on a flexible antenna, a new way to improve the interconnection has also been investigated. The tag prototypes were subjected to recurrent machine-washing tests, and after each washing cycle, their performance was analyzed mainly in terms of the read range. The results reveal that, with a proper treatment on the antenna-IC fixture interconnection, the tag antennas developed with the PDMS-conductive fabric composite can maintain their performance very well, showing a minimum degradation in the read range after 15 cycles of washing.

Published
2019

26. Introduction

Author

Boriskin, A., Sauleau, R., Technicolor [Cesson Sévigné], Technicolor, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Center for Outcomes Research and Evaluation, Yale School of MedicineEuropean Science Foundation, Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Université de Nantes (UN)-Université de Rennes 1 (UR1)

Subjects
[SPI]Engineering Sciences [physics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

30. Design and manufacturing of conformai antenna array on a conical surface at 5.2 GHz

Author

Jaeck , V., Bernard , L., Mahdjoubi , K., Sauleau , R., Collardey , S., Pouliguen , P., Potier , P., Institut franco-allemand de recherches de Saint-Louis ( ISL ), DGA-Matériaux et nanosciences d'Alsace, Université de Strasbourg ( UNISTRA ) -Université de Haute-Alsace (UHA) Mulhouse - Colmar ( Université de Haute-Alsace (UHA) ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Strasbourg ( UNISTRA ) -Université de Haute-Alsace (UHA) Mulhouse - Colmar ( Université de Haute-Alsace (UHA) ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre National de la Recherche Scientifique ( CNRS ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), and Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS )

Subjects
[ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Conformal array, LDS, microstrip antenna, [ SPI.TRON ] Engineering Sciences [physics]/Electronics
Abstract

International audience; This article presents the design of a conformal printed antenna array on a conical surface; two prototypes have been fabricated with a conventional technology and with the Protopaint-LDS® technology; our results are found to be in good agreement with the numerical ones and both technologies are compared, showing the benefits and drawbacks of each one. © 2017 European Microwave Association.

Published
2017

31. Effect of acute millimeter wave exposure on dopamine metabolism of NGF-treated PC12 cells

Author

Haas, A.J., Le Page, Y., Zhadobov, M., Sauleau, R., Dréan, Y.L., Saligaut, C., Institut de recherche en santé, environnement et travail (Irset), Université d'Angers (UA)-Université de Rennes (UR)-École des Hautes Études en Santé Publique [EHESP] (EHESP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), 2012-2-061, French Agency for Food, Environmental and Occupational Health & Safety, Université d'Angers (UA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-École des Hautes Études en Santé Publique [EHESP] (EHESP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )-Institut National de la Santé et de la Recherche Médicale (INSERM)-École des Hautes Études en Santé Publique [EHESP] (EHESP)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Université d'Angers (UA), and Université de Nantes (UN)-Université de Rennes 1 (UR1)

Subjects
Dopamine Plasma Membrane Transport Proteins, Dopamine, Electromagnetic Radiation, in vitro, dopamine turnover, PC12 Cells, 60 GHz, Rats, nervous system, Nerve Growth Factor, Regular Paper, 3,4-Dihydroxyphenylacetic Acid, Animals, [SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie, Extracellular Space, neuron-like model
Abstract

International audience; Several forthcoming wireless telecommunication systems will use electromagnetic frequencies at millimeter waves (MMWs), and technologies developed around the 60-GHz band will soon know a widespread distribution. Free nerve endings within the skin have been suggested to be the targets of MMW therapy which has been used in the former Soviet Union. So far, no studies have assessed the impact of MMW exposure on neuronal metabolism. Here, we investigated the effects of a 24-h MMW exposure at 60.4 GHz, with an incident power density (IPD) of 5 mW/cm2, on the dopaminergic turnover of NGF-treated PC12 cells. After MMW exposure, both intracellular and extracellular contents of dopamine (DA) and 3,4-dihydroxyphenylacetic acid (DOPAC) were studied using high performance liquid chromatography. Impact of exposure on the dopamine transporter (DAT) expression was also assessed by immunocytochemistry. We analyzed the dopamine turnover by assessing the ratio of DOPAC to DA, and measuring DOPAC accumulation in the medium. Neither dopamine turnover nor DAT protein expression level were impacted by MMW exposure. However, extracellular accumulation of DOPAC was found to be slightly increased, but not significantly. This result was related to the thermal effect, and overall, no evidence of non-thermal effects of MMW exposure were observed on dopamine metabolism. © 2017 The Author. Published by Oxford University Press on behalf of The Japan Radiation Research Society and Japanese Society for Radiation Oncology.

Published
2017

38. Ka-band Metasurface Antenna for Data Downlink from LEO Satellites

Author

Minatti, G., primary, Caminita, F., additional, Martini, E., additional, Martorelli, V., additional, Benini, A., additional, Le Coq, L., additional, Ettorre, M., additional, Sauleau, R., additional, Bandinelli, M., additional, Ravanelli, R., additional, Sabbadini, M., additional, and Maci, S., additional

Published
2018
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41. Antennas for ingestible capsule telemetry

Author

Nikolayev, D., Zhadobov, M., Sauleau, R., Karban, P., Institut d'Electronique et de Télécommunications de Rennes (IETR), Centre National de la Recherche Scientifique (CNRS)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES), Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Université de Nantes (UN)-Université de Rennes 1 (UR1)

Subjects
Patient monitoring, Prosthetics, Disease treatment, education, Biomedical telemetry, Health care, Healthcare innovation, Implantable electronic implant device, Patient treatment, Radiotelemetry, Patient mobility, Ingestible gi capsule antenna system, Patient diagnostic, Biomedical applications, [SPI.TRON]Engineering Sciences [physics]/Electronics, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Ingestible capsule wireless telemetry, Antennas, Biomedical electronics
Abstract

International audience; The electronic implants for biomedical applications came out in mid-50s with the invention of the first pacemakers. This healthcare innovation exposed the potential and revealed the vast opportunities in the field of implantable electronic devices, enabling new ways of diagnostics and treatments maintaining the patient mobility. So, the idea of wireless telemetry was born: it permits to efficiently prevent, monitor and treat a disease timely. In this chapter, we provide an overview of ingestible capsule wireless telemetry with the main focus on specific challenges and difficulties associated to the design of ingestible GI capsule antenna systems. © The Institution of Engineering and Technology 2016.

Published
2016

42. Antenna/human body interactions in the 60 GHz band: State of knowledge and recent advances

Author

Zhadobov, M., Leduc, C., Guraliuc, A., Chahat, N., Sauleau, R., Institut d'Electronique et de Télécommunications de Rennes (IETR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), California Institute of Technology (CALTECH)-NASA, and Université de Nantes (UN)-Université de Rennes 1 (UR1)

Subjects
Body-centric mmw applications, Antenna-human body interactions, Frequency 60 ghz, Near field interactions, Standard methodologies, Exposure metric, Body proximity, [SPI.TRON]Engineering Sciences [physics]/Electronics, Radio networks, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Near-field exposure, Exposure assessment, Antennas, Wireless device radiation
Abstract

International audience; In this chapter, we presented a review of the state-of-the-art, recent advances, and remaining challenges in the field of antenna/human body interactions in the 60 GHz band, with a particular emphasis on the near-field interactions that may occur in emerging body-centric MMW applications. For new near-field exposure scenarios expected to appear in coming years, today there is no any clear regulation in terms of the exposure assessment, and standard methodologies for compliance testing are not available in the 60 GHz band. Most of the exposure guidelines and standards recommend IPD as a dosimetric quantity. It cannot be directly used as a metric for near-field exposures since practically it is very challenging, if not impossible, to determine numerically or experimentally local IPD under near-field conditions. Some reports suggest that temperature rise could be used as an exposure metric at MMW. However, in practice, it is not always possible because of some limitations discussed in this chapter. We suggest to use eIPD as a metric; it can be conveniently retrieved from SAR computations and/or measurements and takes into account the perturbation of the wireless device radiation due to the body proximity. © The Institution of Engineering and Technology 2016.

Published
2016

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