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Affichage de 6571 à 6580 sur 16232

Communication dans un congrès

Dielectric Properties Extraction of Coplanar Propagation Waveguides on High Resistivity Silicon Substrates

Qing Lv, Hua Zhao, N. Defrance, Chao Fu, Kamel Haddadi, Lujuan Ma

The dielectric properties of coplanar propagation waveguides (CPW) designed and fabricated on high resistivity silicon substrates are investigated. These CPWs exhibited transmission losses around 0.4 dB/mm at 50 GHz. In particular, temperature-dependent measurements show very low deviations. The...

International Conference on Mechatronics, Electronic, Industrial and Control Engineering (MEIC), Apr 2015, Shenyang, PEOPLES R, China. pp.539-542. ⟨hal-03224668⟩

Article dans une revue

Cancellation Technique for CW Ground Penetrating Radar Applications

S. Nounouh, Kamel Haddadi, T. Lasri

An adjustable canceller based on microwave interferometry is proposed for ground penetrating radar applications. This canceller, built up with a power divider and an impedance tuner, is integrated in a monostatic continuous wave (CW) radar in order to improve its measurement sensitivity. A set of...

IEEE Microwave and Wireless Components Letters, 2015, 25 (5), pp.343-345. ⟨10.1109/LMWC.2015.2410144⟩. ⟨hal-03224664⟩

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Forward V-band Vector Network Analyzer Based on a Modified Six-port Technique

Kamel Haddadi, Tuami Lasri

A V-band forward network analyzer based on a modified six-port technique is proposed for the measurement of complex reflection (S-11) and transmission (S-21) coefficients. The millimeter-wave part of the system is implemented on a thin alumina ceramic substrate. The measurement performance is...

2015 IEEE Topical Conference on Wireless Sensors and Sensor Networks, WiSNet 2015, 9th IEEE Radio & Wireless Week, RWW 2015, Jan 2015, San Diego, CA, États-Unis. pp.23-25, ⟨10.1109/WISNET.2015.7127400⟩. ⟨hal-03224666⟩

Communication dans un congrès

Room-Temperature, Zero-Bias Plasmonic THz Detection by Asymmetric Dual-Grating-Gate HEMT

Takayuki Watanabe, Tetsuya Kawasaki, Akira Satou, Stéphane Boubanga-Tombet, Tetsuya Suemitsu, Guillaume Ducournau, Dominique Coquillat, Wojciech Knap, Hiroaki Minamide, Hiromasa Ito, Viacheslav Popov, Yahya Moubarak Meziani, Taiichi Otsuji

We study theoretically and experimentally the plasmonic THz detection by the asymmetric dual-grating-gate HEMT at room temperature without source-to-drain bias. We derive the analytical expressions of photocurrents due to the plasmonic drag and ratchet effects, and we discuss about their frequency...

Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VIII, Feb 2015, San Francisco, United States. pp.93620F, ⟨10.1117/12.2079184⟩. ⟨hal-01163013⟩

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Modeling of ZigBee (IEEE 802.15.4) channel in rail environment for Intelligent Transport

Ulrich Biaou, Laïd Sadoudi, Michael Bocquet, Atika Rivenq

To deploy Wireless Sensor Networks (WSNs) in the railway transport, knowledge of signal propagation in this environment is required for the safety and the reliability of whole system. This calls to two domains of research. Firstly, the study of the propagation characteristics is necessary to...

4th IEEE International Conference on Advanced Logistics and Transport, IEEE ICALT 2015, May 2015, Valenciennes, France. pp.293-298, ⟨10.1109/ICAdLT.2015.7136637⟩. ⟨hal-03528689⟩

Communication dans un congrès

Minimum spanning tree topology in real zigbee-arduino sensor network

M. Ouadou, O. Zytoune, Yassin El Hillali, Atika Rivenq, D. Aboutajdine

In this paper, we present a real indoor application for improved”Cluster Tree” network using Zigbee sensor nodes integrated with”Arduino” microcontrollers where the main goal is to study the efficiency of our improved clustering topology based on Minimum Spanning Tree (MST) construction under real...

7th International Conference on Ad Hoc Networks, AdHocHets 2015, Sep 2015, San Remo, Italy. pp.57-68, ⟨10.1007/978-3-319-25067-0_5⟩. ⟨hal-03528680⟩

Article dans une revue

A Unified Explanation of gm /ID -Based Noise Analysis

Jack Ou, Pietro Maris Ferreira

We present an unified explanation of the transconductance-to-drain current (gm/ID)-based noise analysis in this paper. We show that both thermal noise coefficient (γ) and device noise corner frequency (fco) are dependent on the gm/ID of a transistor. We derive expressions to demonstrate the...

Journal of Circuits, Systems, and Computers, 2015, 24 (1), pp.1550010. ⟨10.1142/S0218126615500103⟩. ⟨hal-01222077⟩

Communication dans un congrès

When capacitive transduction meets the thermomechanical limit: Towards femto-newton force sensors at very high frequency

S. Houmadi, Bernard Legrand, J.P. Salvetat, B. Walter, E. Mairiaux, J.P. Aime, D. Ducatteau, P. Merzeau, L. Buisson, J. Elezgaray, Didier Theron, Marc Faucher

We show that the capacitive transduction of a MEMS device using a setup based on a microwave detection scheme achieves the measurement of the thermomechanical noise spectrum of a high-frequency (>10 MHz) high-stiffness (>10 5 N/m) resonator, reaching the outstanding displacement resolution of...

28th IEEE Conference on Micro Electro Mechanical Systems, MEMS 2015, Jan 2015, Estoril, Portugal. ⟨10.1109/MEMSYS.2015.7050908⟩. ⟨hal-01962374⟩

Communication dans un congrès

0.69 THz room temperature heterodyne detection using GaN nanodiodes

Carlos Daher, Jeremie Torres, Ignacio Iñiguez-De-La-Torre, Philippe Nouvel, Luca Varani, Paul Sangaré, Guillaume Ducournau, Christophe Gaquière, Javier Mateos, And Tomás González

GaN-based asymmetric nanodiodes have been used as heterodyne detectors up to 0.69 THz in free-space configuration where Intermediate Frequency bandwidth has been measured up 13 GHz. Monte Carlo simulations, used to estimate nano-device intrinsic conversion losses of 27 dB have confirmed these...

19th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures, 2015, Salamanca, Spain. ⟨10.1088/1742-6596/647/1/012006⟩. ⟨hal-01920765⟩

Communication dans un congrès

Semi-digital FIR DAC for low power single carrier IEEE 802.11ad 60GHz transmitter

Fikre Tsigabu Gebreyohannes, Antoine Frappé, Andreas Kaiser

IEEE 802.11ad (WiGig) is an emerging multi-Gb/s wireless standard in the unlicensed 60GHz spectrum. This work presents system level validation of a Single Carrier (SC), QPSK modulated WiGig transmitter based on a semi-digital Finite Impulse Response (FIR) Digital-to-Analog Converter (DAC). The 1....

2015 IEEE 13th International New Circuits and Systems Conference (NEWCAS), Jun 2015, Grenoble, France. pp.1-4, ⟨10.1109/NEWCAS.2015.7182016⟩. ⟨hal-03377047⟩