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Affichage de 3161 à 3170 sur 16175

  • Chapitre d'ouvrage

2 - Closed loop

L. Dobrzynski, Housni Al Wahsh, Abdellatif Akjouj, El Houssaine El Boudouti, Cécile Ghouila-Houri, Abdelkrim Talbi, Gaëtan Lévêque, Bahram Djafari-Rouhani

A closed loop can be obtained by linear superposition of the two free ends of an open loop. Its main property is the double degeneracy of its states. The analytical expressions of its eigenvalues, eigenfunctions, and response function are presented. The case of two simultaneous identical measures...

Photonics, Part one: photonic paths, Elsevier, pp.15-19, 2021, 978-0-12-819388-4. ⟨10.1016/B978-0-12-819388-4.00011-3⟩. ⟨hal-03350752⟩

  • Article dans une revue

MMIC Vector Topology Enabling Multi RF Functionalities for 5G and Beyond

Christophe Loyez, Michael Bocquet, Kamel Haddadi

This paper presents a vector topology of a monolithic microwave integrated circuit (MMIC) capable of performing several radiofrequency (RF) functionalities essential for future wireless communications and geolocation in the millimeter frequency band. The proposed circuit can address several usage...

IEEE Access, 2021, 9, pp.114418-114427. ⟨10.1109/ACCESS.2021.3098179⟩. ⟨hal-03334163⟩

  • Article dans une revue

Heuristically accelerated reinforcement learning for channel assignment in wireless sensor networks

Mohamed Sahraoui, Azeddine Bilami, Abdelmalik Taleb-Ahmed

In wireless sensor networks (WSNs), multi-channel communication represents an attractive field due to its advantage in improving throughput and delivery rate. However, the major challenge that faces WSNs is the energy constraint. To overcome the channel assignment problem in an energy-efficient way...

International Journal of Sensor Networks, 2021, 37 (3), pp.159. ⟨10.1504/IJSNET.2021.118877⟩. ⟨hal-03501786⟩

  • Article dans une revue

Preanalytical issues and cycle threshold values in SARS-CoV-2 real-time RT-PCR testing: should test results include these?

Ilka Engelmann, Enagnon Kazali Alidjinou, Judith Ogiez, Quentin Pagneux, Sana Miloudi, Ilyes Benhalima, Mahdi Ouafi, Famara Sané, Didier Hober, Alain Roussel, Christian Cambillau, David Devos, Rabah Boukherroub, Sabine Szunerits

Since the emergence of SARS-CoV-2 pandemic, clinical laboratories worldwide are overwhelmed with SARS-CoV-2 testing using the current gold standard: real-time reverse-transcription polymerase chain reaction (RT-PCR) assays. The large numbers of suspected cases led to shortages in numerous reagents...

ACS Omega, 2021, 6 (10), pp.6528-6536. ⟨10.1021/acsomega.1c00166⟩. ⟨hal-03196337⟩

  • Communication dans un congrès

Analysis of the Susceptibility of the LoRa Communication Protocol in the Railway Electromagnetic Environment

Virginie Deniau, Thomas Vantroys, Norbert Becuwe, Christophe Gransart, Artur Nogueira de Sao Jose, Alexandre Boé, Eric Pierre Simon, Olivier Vlamynck, Florent Valenti, Jonathan Villain, Quentin Rivette

In the context of the digital transformation of railway transportation systems, railway operators investigate the potentialities of the IoT (Internet of Things) in order to optimize the maintenance operations on the vehicles and the infrastructures. One of the interest is to use IoT communication...

URSI GASS 2021, XXXIV General Assembly and Scientific Symposium (GASS) of the International Union of Radio Science (URSI), Aug 2021, Rome, Italy. 4p. ⟨hal-03265936⟩

  • Communication dans un congrès

20 Gbit/s 306 GHz link enabled by Yagi-Uda antenna

Guillaume Ducournau, Fabio Pavanello, Aritrio Bandyopadhyay, Cybelle Belem-Gonçalves, Frédéric Gianesello, Cyril Luxey, Emilien Peytavit, Jean-Francois Lampin, Malek Zegaoui, Mohammed Zaknoune

We report on the use of a Yagi-Uda antenna on polymer substrate used in a 306 GHz-20 Gbit/s real-time data link for indoor applications. The Yagi-Uda antenna is described and the validation of the THz link is obtained in amplitude modulation mode and using QAM-16 signals (32 Gbit/s).

2021 URSI GASS Conference, Session D08: Integrated Terahertz Electronic and Photonic Devices and Systems (Part 2), Aug 2021, Rome, Italy. pp.939-942. ⟨hal-03413356⟩

  • Chapitre d'ouvrage

19 - Optical Waves in Finite Layered Photonic Crystals

Abdellatif Akjouj, El Houssaine El Boudouti, L. Dobrzynski, Bahram Djafari-Rouhani

We investigated the propagation of electromagnetic waves in a finite photonic crystal bounded by a substrate and vacuum, and separated from them by a buffer layer and a cap layer. In this realistic geometry, we show the existence of different kinds of localized and resonant modes whose behaviors...

Photonics, Part Three: Photonic Materials, Elsevier, pp.529-568, 2021, 978-0-12-819388-4. ⟨10.1016/B978-0-12-819388-4.00030-7⟩. ⟨hal-03360008⟩

  • Article dans une revue

Near-field scanning millimeter-wave microscope operating inside a scanning electron microscope: towards quantitative electrical nanocharacterization

Petr Polovodov, Didier Theron, Clément Lenoir, D. Deresmes, Sophie Eliet, Christophe Boyaval, Gilles Dambrine, Kamel Haddadi

The main objectives of this work are the development of fundamental extensions to the existing scanning microwave microscopy (SMM) technology to achieve quantitative complex impedance measurements at the nanoscale. We developed an SMM operating up to 67 GHz inside a scanning electron microscope...

Applied Sciences, 2021, 11 (6), pp.2788. ⟨10.3390/app11062788⟩. ⟨hal-03320954v2⟩

  • Article dans une revue

Optimization of Reactive-Ion Etching (RIE) parameters to maximize the lateral etch rate of silicon using SF6/N2 gas mixture: An alternative to etching Si in MEMS with Au components

Munique Kazar Mendes, Cécile Ghouila-Houri, Serria Hammami, Thomas Arnoult, Philippe Pernod, Abdelkrim Talbi

In this work, the effects of the N2 addition to the SF6 plasma used in the isotropic silicon etching of Microelectromechanical systems (MEMS) with Au components are investigated. A four-variables Doehlert design was implemented for optimizing the etching parameters (power, pressure, gas flow rate,...

Materials Letters, 2021, 285, pp.129058. ⟨10.1016/j.matlet.2020.129058⟩. ⟨hal-03330078⟩

  • Chapitre d'ouvrage

9 - Electromagnetic Induced Transparency, Induced Absorption, and Fano Resonances in Photonic Circuits

El Houssaine El Boudouti, Abdellatif Akjouj, Bahram Djafari-Rouhani, Abdelkrim Talbi, L. Dobrzynski

In this chapter, a simple photonic device consisting of two dangling side resonators grafted at two sites (U-shape) or at the same site (cross-shape) along a waveguide is designed in order to obtain sharp resonant states inside the transmission gaps without introducing any defects in the structure...

Photonics, Part 2: Photonic Circuits, Elsevier, pp.155-191, 2021, 978-0-12-819388-4. ⟨10.1016/B978-0-12-819388-4.00019-8⟩. ⟨hal-03359904⟩