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Affichage de 6371 à 6380 sur 16170

Article dans une revue

Ultrasonic Tomography of Nonmixing Fluid Flows

P I Pyl 'Nov, P I Krutyansky, V I Kutlubaeva, Farzam Zoueshtiagh, P I Chainais, V I Herman, Philippe Pernod

An ultrasonic method for simultaneous measurement of two-dimensional distributions of compositions and flow velocities in a system of two nonmixing fluids is proposed and implemented. The method is based on tomographic reconstruction of images of scalar and vector objects using a rectangular system…

Physics of Wave Phenomena, 2015, 23, pp.273 - 278. ⟨10.3103/S1541308X15040056⟩. ⟨hal-01433710⟩

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⟩

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⟩

Communication dans un congrès

Analysis of a Phononic Crystal Constituted of Piezoelectric Layers Using Electrical Impedance Measurement

S.A. Mansoura, Pierre Marechal, Bruno Morvan, Bertrand Dubus

Active materials are investigated as a tuning possibility for phononic crystals. Electromechanical properties of piezoelectric materials electrical and mechanical variables are coupled. Thus, the propagation properties of elastic waves can be tuned using electrical impedance load connected to the…

2015 ICU International Congress on Ultrasonics, Metz, France, May 2015, Metz, France. pp.283-286, ⟨10.1016/j.phpro.2015.08.155⟩. ⟨hal-03875669⟩

Article dans une revue

Ultrasonic reflectometry in air: errors of sample positioning

Mariusz Kaczmarek, Bogdan Piwakowski, Radoslaw Drelich

The reflection coefficient of ultrasonic waves propagating in air and interacting with a plane surface of a solid is considered. The simulation of dependence of the reflection coefficient on errors of sample positioning is performed using a finite beam model along with an angular spectrum method,…

Journal of the Acoustical Society of America, 2015, 137 (1), pp.261-272. ⟨10.1121/1.4904533⟩. ⟨hal-03639070⟩

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⟩

Communication dans un congrès

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⟩

Article dans une revue

V-Band Via-Less GCPW-to-Microstrip Transition Designed on PET Flexible Substrate Using Inkjet Printing Technology

A. Chahadih, Pierre-Yves Cresson, C. Mismer, T. Lasri

In this letter, a grounded coplanar waveguide-to-microstrip (GCPW-to-MS) transition without via holes is presented. The transition is designed on a PET® substrate and fabricated using inkjet printing technology. To our knowledge, fabrication of transitions using inkjet printing technology has not…

IEEE Microwave and Wireless Components Letters, 2015, 25 (7), pp.436-438. ⟨10.1109/LMWC.2015.2427576⟩. ⟨hal-03538488⟩

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

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⟩