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Communication dans un congrès

Optically-pumped continuous-wave terahertz sources

Philipp Latzel, Fabio Pavanello, Emilien Peytavit, Mohammed Zaknoune, Guillaume Ducournau, X. Wallart, Jean-Francois Lampin

Recently we have improved the efficiency and the output power of our optically pumped continuous-wave THz sources. These sources are based on the beating of two laser lines in a wide bandwidth photodetector. Its intrinsic nonlinear behaviour is used to produce a beatnote at the frequency difference…

Conference on Quantum Sensing and Nanophotonic Devices XII, SPIE, Feb 2015, San Francisco, CA, United States. pp.937008, ⟨10.1117/12.2080756⟩. ⟨hal-03286185⟩

Article dans une revue

Tunability of Bragg band gaps in one-dimensional piezoelectric phononic crystals using external capacitances

Sebastien Degraeve, Christian Granger, Bertrand Dubus, Jerome O. Vasseur, Mai Pham Thi, Anne-Christine Hladky

A one-dimensional stack of identical piezoelectric rods is investigated. The device exhibits a band gap related to electrical boundary condition. A separate control of the central frequency and of the width of the band gap is performed by an electrical boundary condition involving two different…

Smart Materials and Structures, 2015, 24 (8), 085013, 11 p. ⟨10.1088/0964-1726/24/8/085013⟩. ⟨hal-03300134⟩

Article dans une revue

Wave propagation in functionally graded piezoelectric rods with rectangular cross-section

J.G. Yu, Zhang Bo, Jean-Etienne Lefebvre, C. Zhang

For the purpose of design and optimization of functionally graded piezoelectric material (FGPM) transducers, wave propagation in FGPM structures has received much attention in the past twenty years. But research focused essentially on semi-infinite structures and one-dimensional structures, i.e.,…

Archives of Mechanics, 2015, 67 (3), pp.213-231. ⟨hal-03560812⟩

Communication dans un congrès

Intelligent receiver for M-OAM IR-UWB modulations system

Lamyae Maatougui, Khadija Hamidoun, Yassin El Hillali, Atika Rivenq, A. Hajjaji, H. Ouahmane

Wireless technology for communication, represents a permanent and evolutionary need in transport field, motivated by the improvement of the efficiency and safety of transports. The use of the ultra-wideband (UWB) technique can satisfy such a need. UWB ofTers numerous advantages such as: the large…

4th IEEE International Conference on Advanced Logistics and Transport, IEEE ICALT 2015, May 2015, Valenciennes, France. pp.111-115, ⟨10.1109/ICAdLT.2015.7136604⟩. ⟨hal-03528677⟩

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

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⟩

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

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

Wave propagation in graded rings with rectangular cross-sections

J.G. Yu, X.D. Yang, Jean-Etienne Lefebvre, Ch. Zhang

In this paper, a double orthogonal polynomial series method is proposed to investigate the guided wave propagation in a two-dimensional (2-D) structure, namely, a FGM ring with a rectangular cross-section. Two kinds of graded rings are considered: material gradient directions being in the radial…

Wave Motion, 2015, 52, pp.160-170. ⟨10.1016/j.wavemoti.2014.09.009⟩. ⟨hal-03560833⟩