David DUBUC, Dr.

 limms_David.jpg Host Laboratory Toshiyoshi Lab.
Position in LIMMS CNRS Researcher (from 2007 to )
Main Topic Research in LIMMS Advanced MEMS/NEMS
Contact LIMMS/CNRS-IIS (UMI 2820)
Institute of Industrial Science, The University of Tokyo, 4-6-1 Komba, Meguro-ku, Tokyo 153-8505, Japan
Phone:+81 (0)3 5452 6036 / Fax:+81 (0)3 5452 6088
E-mail davidmailmark.gifiis.u-tokyo.ac.jp


David DUBUC is currently an associate professor at the University of Toulouse, where he is involved in researches on microwave and millimeterwave microsystem integration on Silicon at the LAAS-CNRS laboratory. He received his Ph.D. degree from the University of Toulouse, France, in 2001, working on the design of AsGa and SiGe monolithic microwave integrated circuits (MMIC). His research interests are now the development of RF-MEMS based tunable passive circuits (including activities on reliability and RF-power enhancement techniques) and 3D ultra compact passives function integrated on Silicon. Since 2001, he advised or co-advised 6 Ph.D. students, authored or co-authored over 120 papers in refereed journals and conferences. Since September 1st 2007, David Dubuc joined for two years the LIMMS – CNRS/IIS in Tokyo Japan.
Resume David Dubuc

Main publication List (before LIMMS)

3D passifs circuits design
[1] 3D-BCB Based Branchline Coupler for K-band Integrated Microsystem, Minh-Nhut Do, David Dubuc, Katia Grenier, Laurent Bary, Laurent Mazenq, and Robert Plana, 2006 European Microwave Week, Manchester, UK
[2] Low Insertion Losses Broadside Coupler in a Multilayer Above IC Technology for K-band Applications, M.N. Do, D. Dubuc, K. Grenier, R. Plana, IMS 2007, Hawaii, USA

Power RF-MEMS components and circuits design
[3] Efficient design methodology of polymer based RF MEMS Switches, B. Ducarouge, D. Dubuc, S. Mellé, F. Flourens, A. Boukabache, K. Grenier, L. Bary, P. Pons, and R. Plana, 5th IEEE Topical Meeting on Silicon Monolithic Integrated Circuits in RF systems (SiRF), Atlanta (USA), 8-10 Septembre 2004, pp.298-301
[4] High Power Behavior of Capacitive RF MEMS Switches, B. Ducarouge, C. Bordas, S. Mellé, D. Dubuc, K. Grenier and R. Plana, submitted to IEEE Microwave and Wireless Components Letter
[5]D.DUBUC, C.BORDAS, K.GRENIER, Efficient design methodology of RF-MEMS based tuner, European Microwave Week 2008 (EuMN 2008), Amsterdam (Pays Bas), 27-31 Octobre 2008, pp.398-401

RF-MEMS reliability
[6] Reliability Modeling of Capacitive RF MEMS, Samuel Mellé, David De Conto, David Dubuc, Katia Grenier, Olivier Vendier, Jean-Luc Muraro, Jean-Louis Cazaux and Robert Plana, IEEE Transaction on Microwave theory and Techniques, vol 53, n°11, november 2005, pp 3482-3488
[7] Investigation of Dielectric degradation of Microwave Capacitive Microswitches, S.Melle, F. Flourens, P. Pons, K. Grenier, D. Dubuc and R. Plana, Y.Segui, J.LMuraro, 17th IEEE International Conference on Micro Electro Mechanical Systems(MEMS'2004), Maastricht (Pays-Bas), 25-29 Janvier 2004, pp.141-144
[8] Carbon Nanotube Based Dielectric for Enhanced RF MEMS Reliability, Chloé Bordas, Katia Grenier, David Dubuc, Emmanuel Flahaut, Sébastien Pacchini, Mathieu Paillard and Jean-Louis Cazaux, IMS 2007, Hawaii, USA

Carbon Nanotubes for RF and microwaves Applications
[9] T.RICART, S.PACCHINI, D.DUBUC, K.GRENIER, Multiphysic modeling and design of carbon nanotubes based variable capacitors for microwave applications, European Microwave Week 2008 (EuMN 2008), Amsterdam (Pays Bas), 27-31 Octobre 2008, pp.1189-1192
[10] S.PACCHINI , T.IDDA , D.DUBUC , E.FLAHAUT , K.GRENIER, Carbon nanotube-based polymer composites for microwave applications. Rapport LAAS N°08216, International Microwave Symposium (IMS 2008), Atlanta (USA), 15-20 Juin 2008, 4p.
[11] T.RICART, S.PACCHINI, C.COJOCARU, D.PRIBAT, D.DUBUC, K.GRENIER, Carbon nanotubes based microwave varactor: modeling, simulation and design, Optics and Photonics 2008: Nanoscience and Engineering, San Diego (USA), 10-14 Août 2008, 9p.
[12] S.PACCHINI, M.DILHAN, T.RICART, D.DUBUC, C.COJOCARU, D.PRIBAT, K.GRENIER, Microinterconnection technology suitable for RF-NEMS varactors elaboration, Optics and Photonics 2008: Nanoscience and Engineering, San Diego (USA), 10-14 Août 2008, 7p.

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Research Projects in Limms

Integration of tunable metamaterial structures for RF-applications

Context : Since many years, are intensively but separately investigated both (1) microtechnologies implying new and innovative substrate/material as alternative to silicon semiconductor and (2) metamaterial structures for RF and microwave applications exhibiting new behaviors and characteristics.
Objectives : We then propose to mix these two concepts and to investigate the integration of metamaterial structures with plastic-based microtechnologies in order to reach improved performances and functionalities. The objective is to demonstrate that high miniaturization level can be reached as well as tunability of RF-performances.
Methods : An existing technology for the future generation of large and flexible display panels has then been derived for RF applications. The structures consist in periodic metallic posts realized on plastic substrate over which a thin dielectric film, supporting the RF-line, is laminated (fig. 1). The resulting structures exhibit large bendability suitable for conformal integration on planar and non-planar objects.
Results : A specific modeling of the proposed structures has been developed and validated [1]. It permits to define suitable design and technology leading to the fabrication and test of proof of concept demonstrators (fig. 2), which exhibit improved miniaturization level and wide tunability (fig. 3) [2]. This opens a route towards miniature, reconfigurable and mechanically flexible RF and microwave structures.

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Publications in LIMMS

International Conferences

  1. David Dubuc, Daisuke Yamane, Zhang Rui, Yuheon Yi, Katia Grenier, Hiroyuki Fujita, Hiroshi Toshiyoshi, Modelling and Design Guidelines of Metamaterial-based Artificial Dielectric for the Miniaturization of Microwave Passive Circuits, Metamaterials 2008, 23-26 sept. 2008, Pamplona, Spain
  2. K. Grenier, D. Dubuc, M. Kumemura, H. Toshiyoshi, H. Fujita, ‘Contact less radio-frequencies biosensor for biological parameters analysis’, International Conference on Biomedical Electronics and Devices, Biodevices 2009, Porto, Portugal, January 14-17, 2009
  3. K. Grenier, D. Dubuc, P-E. Poleni, M. Kumemura, T. Fujii, H. Toshiyoshi, H. Fujita, ‘New broadband and contact less RF / microfluidic sensor dedicated to bioengineering’, IEEE International Microwave Symposium 2009, Boston, USA, June 2009
  4. K. Grenier , D. Dubuc, 'Toward RF-based Microsystems for Bio-Engineering’, invited paper at Colloquia on ICT for Life Sciences, CNIT General Assembly, Parma, Italy, June 2009
  5. D. Dubuc, K. Grenier, H. Fujita, H. Toshiyoshi , ‘Micro-Fabricated Tunable Artificial Dielectric for Reconfigurable Microwave Circuits’, IEEE EuMW 2009, Rome, Italy, Oct 2009

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