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Affichage de 4411 à 4420 sur 16294

Article dans une revue

New millimeter wave generation scheme for MIMO-OFDM based Radio-over-Fiber system

M. El Yahyaoui, A. El Moussati, Ghaïs El Zein, Kamel Haddadi

This paper proposes a new scheme for the generation and transmission of a MIMO-OFDM signal over optical fiber using a single local oscillator (LO) at 15 GHz. This technique is based on subcarrier multiplexing and Optical Carrier Suppression (OCS) modulation using both Dual-Parallel Mach–Zehnder...

Optics Communications, 2019, 442, pp.101-105. ⟨10.1016/j.optcom.2019.03.017⟩. ⟨hal-02089125⟩

Article dans une revue

Sputtered tungsten nitride films as pseudocapacitive electrode for on chip micro-supercapacitors

Saliha Ouendi, Kevin Robert, Didier Stiévenard, Thierry Brousse, Pascal Roussel, Christophe Lethien

Abstract Micro-supercapacitors, a class of miniaturized electrochemical capacitors, are an attractive solution to power smart and connected sensors for Internet of Thing (IoT) applications. Unfortunately, to propose on chip micro-supercapacitors with high technological readiness level, the...

Energy Storage Materials, 2019, 20, pp.243-252. ⟨10.1016/j.ensm.2019.04.006⟩. ⟨hal-02187904⟩

Communication dans un congrès

Building a near-field scanning millimeter-wave microscope integrated in a scanning electron microscope

Petr Polovodov, Olaf Haenssler, Didier Theron, Christophe Boyaval, Sophie Eliet, Gilles Dambrine, Kamel Haddadi

A near-field scanning millimeter-wave frequency microscope built inside a scanning electron microscope is described. The proposed instrumentation can provide simultaneous atomic force and millimeter-wave images together with the scanning electron microscopy image of the probe / sample interaction....

International Conference on Manipulation, Automation, and Robotics at Small Scales, MARSS 2019, Jul 2019, Helsinki, Finland. 3 p. ⟨hal-02281097⟩

Article dans une revue

High performance silicon nanowires/ruthenium nanoparticles micro-supercapacitors

Yasmina Bencheikh, Maxime Harnois, Roxana Jijie, Ahmed Addad, Pascal Roussel, Sabine Szunerits, Toufik Hadjersi, Seddik El Hak Abaidia, Rabah Boukherroub

The continuous increase of small electronic devices calls for small energy storage components, commonly known as micro-supercapacitors, that can ensure autonomous operation of these devices. In this work, we propose a simple and straightforward method to achieve high energy and power densities of a...

Electrochimica Acta, 2019, 311, pp.150-159. ⟨10.1016/j.electacta.2019.04.083⟩. ⟨hal-02149083⟩

Article dans une revue

Second-order autoregressive model-based Kalman filter for the estimation of a slow fading channel described by the Clarke model: Optimal tuning and interpretation

Ali Houssam El Husseini, Eric Pierre Simon, Laurent Ros

This paper treats the estimation of a flat fading Rayleigh channel with Jakes' Doppler spectrum model and slow fading variations. A common method is to use a Kalman filter (KF) based on an auto-regressive model of order p (AR(p)). The parameters of the AR model can be simply tuned by using the...

Digital Signal Processing, 2019, 90 (July), pp.125-141. ⟨10.1016/j.dsp.2019.04.008⟩. ⟨hal-02112635⟩

Article dans une revue

The Effects of AlN and Copper Back Side Deposition on the Performance of Etched Back GaN/Si HEMTs

Georges Pavlidis, Samuel Kim, Idriss Abid, Malek Zegaoui, F Medjdoub, Samuel Graham

The breakdown voltage of GaN/Si high electron mobility transistors (HEMTs) for power electronics has shown to be improved by removing the silicon substrate. The drawback to this approach is the increase in the device's thermal resistance which limits the power dissipation that the device can...

IEEE Electron Device Letters, 2019, 40 (7), pp.1060-1063. ⟨10.1109/LED.2019.2915984⟩. ⟨hal-02356736⟩

Communication dans un congrès

Micro-Electro-Mechanical-Systems advances for measurements at small scales: the vertical silicon probes technology extended to nearfield optics

B. Walter, E. Mairiaux, Sophie Eliet, Jean-Francois Lampin, Marc Faucher

Instrumentation intending to go beyond the limits of current Atomic Force Microscope setups (AFM), and applications requiring AFM to be integrated in non-standards environmental conditions need sensors that overcome limitations given by available probes. We show that the vertical probe technology...

2019 International Conference on Manipulation, Automation and Robotics at Small Scales (MARSS 2019), Jul 2019, Helsinki, Finland. pp.1-5, ⟨10.1109/MARSS.2019.8860980⟩. ⟨hal-03321928⟩

Article dans une revue

Digital RF transmitter with single-bit ΔΣ M-driven switched-capacitor RF DAC and embedded band filter in 28-nm FD-SOI

Razvan-Cristian Marin, Antoine Frappé, Bruno Stefanelli, Philippe Cathelin, Andreia Cathelin, Andreas Kaiser

This paper presents a single-bit RF transmitter based on single-bit switched-capacitor RF digital-to-analog converters (DACs) embedded in an finite-impulse response (FIR) filter (FIR-DACs). The transmitter system comprises a single-bit quadrature delta-sigma modulator (M), a digital mixer, and a...

IEEE Transactions on Microwave Theory and Techniques, 2019, 67 (7), pp.3200-3209. ⟨10.1109/TMTT.2019.2897929⟩. ⟨hal-02314498⟩

Article dans une revue

Intrinsic transport properties of nanoporous graphene highly suitable for complementary field-effect transistors

Jing Li, Christophe Delerue

The recent success to synthesize an ordered array of pores in graphene by a bottom-up approach (Moreno et al 2018 Science 360 199) yields a semiconducting nanoporous graphene with a bandgap of 0.6 eV. In this paper, we present calculations of the intrinsic carrier mobility in this new type of two-...

2D Materials, 2019, 6 (3), pp.035026. ⟨10.1088/2053-1583/ab1c25⟩. ⟨hal-02133315⟩

Article dans une revue

Toxicity Effect of Silver Nanoparticles on Photosynthetic Pigment Content, Growth, ROS Production and Ultrastructural Changes of Microalgae Chlorella vulgaris

Layla Hazeem, Gamze Kuku, Etienne Dewailly, Christian Slomianny, Alexandre Barras, Abderrahmane Hamdi, Rabah Boukherroub, Mustafa Culha, Mohamed Bououdina

Silver nanoparticles (Ag NPs) exhibit antibacterial activity and are extensively used in numerous applications. The aim of this study was to examine the toxic effect of Ag NPs on the marine microalga, Chlorella vulgaris. The microalgae, at the exponential growth phase, were treated with different...

Nanomaterials, 2019, 9 (7), pp.914. ⟨10.3390/nano9070914⟩. ⟨hal-02373174⟩