197documents trouvés
Nanoelectromechanical switches based on carbon nanotubes for microwave and millimeter waves
M.DRAGOMAN, A.TAKACS, A.MULLER, H.HARTNAGEL, R.PLANA, K.GRENIER, D.DUBUC
IMT, Darmstadt, MINC
Revue Scientifique : Applied Physics Letters, Vol.90, N°11, 113102p., Mars 2007 , N° 07128
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Abstract
In this letter the authors analyze two configurations of nanoelectromechanical switches, which are working in the microwave and millimeter wave frequency ranges. Metallic nanotubes vertically or horizontally positioned on a propagating high frequency planar waveguide disable or enable the electromagnetic field propagation, whether they are actuated or not by a dc electric field of a few volts. Although the dimensions of metallic nanotubes are very small in comparison with the planar waveguide dimensions and the operating wavelengths, these switches are very efficient and agile.
Investigation of stiction effect in electrostatic actuated RF MEMS devices
S.MELLE, C.BORDAS, D.DUBUC, K.GRENIER, O.VENDIER, J.L.MURARO, J.L.CAZAUX, R.PLANA
ALCATEL ESPACE, MINC
Manifestation avec acte : 7th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF'07), Long Beach (USA), 10-12 Janvier 2007, pp.173-176 , N° 06847
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109280High compactness / high isolation 3D-broadside couplers design methodology
M.N.DO, D.DUBUC, K.GRENIER, L.BARY, L.MAZENQ, R.PLANA
MINC, 2I, TEAM
Manifestation avec acte : 2006 Asia-Pacific Microwave Conference (APMC'2006), Yokohama (Japon), 12-15 Décembre 2006, 4p. , N° 06649
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This paper presents the design of a high performance and compactness coupler integrated with a 3D technology using BCB (Benzo-Cyclo-Butene) polymer. The main interests of the proposed technology are first the possibility to design multilayer passive devices to achieve high compactness and secondly to be able to monolithically integrate both passive and active circuits as the technological process is fully compatible with ICs. This technology was used to design coupler for which high compactness is reached by applying size reduction to the transmission lines. Electromagnetic simulations have been performed and show excellent performances in terms of amplitude and phase imbalance, isolation and return loss. Several versions of the coupler have been compared to emphasis such performances versus the reduction factor.
Performances optimization of capacitive parallel MEMS switches
C.BORDAS, K.GRENIER, D.DUBUC, M.PAILLARD, J.L.CAZAUX, R.PLANA
MINC, ALCATEL ESPACE
Manifestation avec acte : 2006 Asia-Pacific Microwave Conference (APMC'2006), Yokohama (Japon), 12-15 Décembre 2006, 4p. , N° 06628
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This paper describes the optimized fabrication of capacitive MEM switch dedicated to both low and high power applications. In order to get a good capacitor ratio, the contact quality of the MEM switch has been optimized. Both metal line roughness and membrane flatness have been investigated. Consequently, insertion losses of 0.13dB as well as an isolation of 40dB at 20GHz have been measured. It corresponds to a 47% contact quality, which is equivalent to those obtained in the state of the art with low power level technologies.
Mots-Clés / Keywords
RF MEMS; Switch; Power handling; Microwave; Coplanar;
Micromachined loop antennas on low resistivity silicon substrates
E.OJEFORS, H.KRATZ, K.GRENIER, R.PLANA, A.RYDBERG
MINC, Uppsala
Revue Scientifique : IEEE Transactions on Antennas and Propagation, Vol.54, N°2, pp.3593-3601, Décembre 2006 , N° 06566
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108620Above-IC BCB-polymer technology for millimetre-wave circuits and systems
K.GRENIER, F.BOUCHRIHA, D.DUBUC, R.PLANA
MINC
Manifestation avec acte : 2006 International Workshop on Microwave Filters, Toulouse (France), 16-18 Octobre 2006, 2p. , N° 06553
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107982High performance thin film bulk acoustic resonator covered with carbon nanotubes
M.DRAGOMAN, A.MULLER, D.NECULOIU, D.VASILACHE, G.KONSTANTINIDIS, K.GRENIER, D.DUBUC, L.BARY, R.PLANA, E.FLAHAUT
IMT, MRG FORTH, MINC, 2I, CIRIMAT
Revue Scientifique : Applied Physics Letters, Vol.89, N°14, p.143122, 2 Octobre 2006 , N° 06850
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This letter presents experimental results concerning a thin film bulk acoustic wave resonator realized on a thin GaN membrane and covered with a thin film of double walled carbon nanotube mixture. The quality factor was measured before and after the coating of the resonator with the nanotube thin film. The quality factor has increased more than ten times when the resonator was coated with nanotubes, due to their high elasticity modulus and low density, which confers a much higher acoustic impedance of the resonator electrodes and thus confines much better the longitudinal acoustic standing waves inside the resonator.
Miniaturized wireless sensor networks
A.LECOINTRE, D.DRAGOMIRESCU, D.DUBUC, K.GRENIER, P.PONS, H.AUBERT, A.MULLER, P.BERTHOU, T.GAYRAUD, R.PLANA
MINC, IMT, OLC
Conférence invitée : 2006 International Semiconductor Conference (CAS'2006), Sinaia (Roumanie), 27-29 Septembre 2006, 4p. , N° 06727
Lien : http://hal.archives-ouvertes.fr/hal-00452543/fr/
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108387In IC an above IC MEMS for millimeterwave communications
M.N.DO, K.GRENIER, D.DUBUC, A.COUSTOU, R.PLANA
MINC, 2I
Conférence invitée : ELECTRONICS 2006, Sozopol (Bulgarie), 20-22 Septembre 2006, 7p. , N° 06726
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108385IC-Compatible low loss passive circuits for millimeter-wave applications
F.BOUCHRIHA, D.DUBUC, K.GRENIER, R.PLANA
MINC
Manifestation avec acte : 36th European Microwave Conference (EuMC'2006), Manchester (GB), 10-15 Septembre 2006, 4p. , N° 06693
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