Teuvo Tapani Ryhänen
Laboratory Director, Eurolab (Cambridge and Lausanne)Cambridge UK
Tapani Ryhänen received his Diploma Engineer (M.Sc.) degree in technical physics and his Doctor of Technology degree in electrical engineering from the Helsinki University of Technology in 1986 and 1992, respectively. He joined Nokia in 1995. He is currently heading Nokia’s research laboratories in Cambridge and Lausanne. The laboratories are focusing on nanotechnologies and pervasive sensing to be applied in mobile devices and services. He is also responsible for Nokia’s research collaboration with the University of Cambridge and the Ecole Polytechnique Fédérale de Lausanne (EPFL). Before his current role he was leading Nokia’s strategic research in the areas of future user interfaces, future device architectures and interfaces, mechanics and miniaturization. His previous work at Nokia also covers sensor technologies and applications, wellness and health applications, ambient intelligence, RF MEMS, microsystems, architectures and interfaces of sensor modules and mass storage solutions. He has authored over 70 publications on ultra-low noise superconducting thin-film magnetometers, noise theory, micromechanical sensors and actuators, biomagnetic measurements, nanotechnologies, and mobile phone technologies and applications. He has over fifty granted patents and several other patent filings related to microsystems, nanotechnologies, sensors and their applications.
Contact information:
Nokia Research Center, Eurolab
Broers Building
Hauser Forum
19 JJ Thomson Avenue
Cambridge
CB3 0FA
United Kingdom
mobile: +44 7825 847681
Research Interests
Throughout my carrier I have been interested in the art of measurements, sensors and sensing. As an experimental physicist working in mobile communications, my humble interest is to help to create artificial senses to the Internet and to make it intelligent. My research work has three different disciplines, sources of inspiration, to create intelligent sensors, devices, applications and services, which are enablers for future mobile solutions. Working in micro- and nanotechnologies we can create new functional materials and novel electronics for mobile devices, sensors and signal processing.
Research Projects
Under construction
Conferences
Under contruction
Publications
Books and book chapters:
T. Ryhänen, M. Uusitalo, O. Ikkala, and A. Kärkkäinen, Nanotechnologies for Future Mobile Devices, Cambridge University Press, February 2010.
T. Ryhänen, M. Uusitalo, and A. Kärkkäinen, When everything is connected, in T. Ryhänen, M. Uusitalo, O. Ikkala, and A. Kärkkäinen, Nanotechnologies for Future Mobile Devices, Cambridge University Press, February 2010, pp. 1-20.
P. Andrew, M.J.A. Bailey, T. Ryhänen, and Di Wei, Sensing, actuation, and interaction, in T. Ryhänen, M. Uusitalo, O. Ikkala, and A. Kärkkäinen, Nanotechnologies for Future Mobile Devices, Cambridge University Press, February 2010, pp. 121-173.
T. Ryhänen, Conclusions, in T. Ryhänen, M. Uusitalo, O. Ikkala, and A. Kärkkäinen, Nanotechnologies for Future Mobile Devices, Cambridge University Press, February 2010, pp. 258-261.
T. Ryhänen, Impact of Silicon MEMS - 30 Years After, in “Handbook of Silicon Based MEMS Materials and Technologies”, Eds. V. Lindroos, M. Tilli, A. Lehto, and T. Motooka, Elsevier, January 2010.
H.Seppä, T. Ryhänen, R. Ilmoniemi, and J. Knuutila, DC SQUID and Its Low-Frequency Applications, in Superconducting Technology: 10 Case Studies, ed. K. Fossheim, World Scientific,1991, pp. 1-30.
R.Ilmoniemi, J. Knuutila, T. Ryhänen, and H. Seppä, Multi‑SQUID Devices and Their Applications, Chapter 5 in Progress in Low Temperature Physics, Vol. XII, Ed. D.F. Brewer, Plenum Press, New York, 1989, pp.271-339.
Selected publications:
Di Wei, M. Bailey, P. Andrew, and T. Ryhänen, Electrochemical biosensors at the nanoscale, Lab on a Chip, vol. 9, pp. 2123-2131, 2009.
T. Ryhänen, Future of Mobile Devices - Energy Efficient Sensing, Computing, and Communication (Invited paper), in Proceedings of 2009 Symposium on VLSI Circuits, Kyoto, June 16-18, 2009.
H. Nieminen, J. Hyyryläinen, T. Veijola, T. Ryhänen, and V. Ermolov, Transient Capacitance Measurement of MEM Capacitor, Sensors and Actuators A117, pp. 267-272, 2005.
V. Ermolov, T. Lindström, H. Nieminen, M. Olsson, M. Read, T. Ryhänen, S. Silanto, and S. Uhrberg, Microreplicated RF Toroidal Inductor, IEEE Transactions on Microwave Theory and Techniques 52, pp. 29-37, 2004.
H. Nieminen, V. Ermolov, S. Silanto, K. Nybergh, and T. Ryhänen, Design of a Temperature-Stable RF MEM Capacitor, IEEE Journal of Microelectromechanical Systems 13, pp. 705-714, 2004.
H. Nieminen, V. Ermolov, K. Nybergh, S. Silanto, and T. Ryhänen, Microelectromechanical Capacitors for RF Applications, Journal ofMicromechanics and Microengineering 12, pp. 177-186, 2002.
H. Nieminen, V. Ermolov, and T. Ryhänen, Microelectromechanical capacitor with wide tuning range, Electronics Letters 37, pp. 1451-1452, 2001.
T. Veijola, H. Kuisma, J. Lahdenperä, and T. Ryhänen, Simulation model for micromechanical angular rate sensor, Sensors and Actuators A60, pp. 113-121, 1997.
T. Veijola, H. Kuisma, J. Lahdenperä, and T. Ryhänen, Equivalent circuitmodel of the squeezed gas film in a silicon accelerometer, Sensors and Actuators A48, pp. 239-248, 1995. (Widely referred paper with over 150 citations).
R. Cantor, K. Enpuku, T. Ryhänen, and H. Seppä, A High Performance Integrated DC SQUID Magnetometer, IEEE Transactions on Magnetics MAG-3(1), 1800 (1993).
T. Ryhänen, H. Seppä, and R.Cantor, Effect of parasitic capacitanceand inductance on the dynamics and noise of dc superconducting quantum interference devices, Journal of Applied Physics 71(12), 6150 (1992). (Widely referred paper, e.g., by R. Kleiner in Proceedings of the IEEE 92, October 2004.
D. Drung, R. Cantor, M. Peters, T. Ryhänen, and H. Koch, Integrated dc SQUID Magnetometer With High dV/dB, IEEE Transactions on Magnetics MAG-27, 3001 (1991).
H. Koch, R. Cantor, D. Drung, S.N. Erne, K.P. Matthies, M. Peters, T. Ryhänen, H.J. Scheer, and H.D. Hahlbohm, A 37 Channel DC SQUID Magnetometer System, IEEE Transactions on Magnetics MAG-27, 2793 (1991).
T. Ryhänen, R. Cantor, D. Drung, and H. Koch, A Practical Low-Noise DC SQUID Magnetometer with Additional Positive Feedback, Applied Physics Letters 59, 228 (1991).
T. Ryhänen, H. Seppä, R. Ilmoniemi, and J. Knuutila, SQUID Magnetometers For Low-Frequency Applications, Journal of Low Temperature Physics 76, pp. 287-386 (1989). (Widely referred review article with over 100 citations, e.g., J. Clarke in Scientific American, August 1994, and R. Kleiner in Proceedings of the IEEE 92, October 2004.)
Presentations
T. Ryhänen, Nokia Vision of the Future, Cambridge Wireless Founders' Dinner, December 9, 2009. (Honoured After Dinner Speech).
T. Ryhänen, Nanotechnologies for future mobile devices and services, Finnish-Russian Nanotech Partnering, Espoo, Otaniemi, November 24, 2009. (Invited).
T. Ryhänen, Nokia Morph - Stretchable electronics for sensing and communication, 2nd International Workshop on Flexible & Stretchable Electronics, Ghent, November 16, 2009. (Conference opening keynote).
T. Ryhänen, Nanotechnology Enabled Energy Solutions for Future Mobile Devices, UK Nanoforum & Emerging Technologies 2009, London, November 3, 2009. (Invited).
T. Ryhänen, Morphing the Future of Mobile Devices, 5th Annual Plastic Electronics Europe 2009, Dresden, October 29, 2009. (Plenary talk).
T. Ryhänen, Future of Mobile Devices - Challenges for Energy Efficient Sensing, Computing and Communication, Samsung Technology Day, Robinson College, Cambridge, October 15, 2009. (Invited).
T. Ryhänen, Investment to the Future Mobile Communication, 5th European Manufacturing Strategies Summit , Düsseldorf, October 14, 2009. (Keynote).
T. Ryhänen, Nanotechnologies for Future Mobile Devices, International Symposium, The Future Telecommunications, Madrid, October 6-7, 2009. (Invited).
T. Ryhänen, Future of Mobile Devices - Challenges for Energy Efficient Sensing, Computing and Communication, 2009 Symposium on VLSI Circuits, Kyoto, June 17, 2009. (Plenary talk).
T. Ryhänen, Morphing the future of mobile devices, FinNano and Functional Materials Annual Seminar, Helsinki, May 28, 2009. (Keynote).
T. Ryhänen, Nokia Morph - Future Transformable Mobile Device, Material Research Society (MRS) Spring Meeting 2009, San Francisco, April 15, 2009. (Invited).
T. Ryhänen, Towards New Paradigms of Sensing, Computing and Communication, MEMS Executive Congress 2008, Monterey, November 6, 2008. (Conference Closing Keynote).
T. Ryhänen, Nokia's Open Innovation Model, Nanotech Northern Europe 2008, Copenhagen, September 24, 2008. (Invited).
T. Ryhänen, MEMS for Mobile Communications, MEMS International 2008, Tokyo, May 16, 2008. (Keynote).
T. Ryhänen, Research Towards Future Mobile Comminication Solutions, CAPE Advanced Technology Lectures, University of Cambridge, April 4, 2008. (Invited).
T. Ryhänen, Nanotech in Mobile Devices, Jawaharlal Nehru Center for Advanced Scientific Research, Bangalore, January 8, 2008. (Invited).
T. Ryhänen, Wireless and Mobile Sensing, Seminar on Sensing the future, Nagoya University and Okmetic, September 5, 2007. (Invited)
T. Ryhänen, Mastering the interface to physical world, Nanotech Northern Europe 2007 Congress & Exhibition,27-29 March 2007, Helsinki, Finland. (Industrial keynote).
T. Ryhänen, Mobile Sensing – Technologies, Applications, andServices, in Horizon Seminar, A Sensory World: novel sensortechnologies and applications, University of Cambridge, 20 March 2007. (Invited)
T. Ryhänen and J. Huopaniemi, Fusing the digital and the physical:future mobile experience, Nokia Technology Media Briefing,3.-4.10.2006, Helsinki. (Keynote)
T. Ryhänen, Nanotechnologies in Electronics Industry, in FinnishPresidency Conference on Nanotechnologies - Safety for Success, 14-15September 2006. (Invited)
T. Ryhänen, Ubiquitous Sensing, Computing, and Communication – ConsumerPerspective, NCCR MICS Industry Forum (Sensor Networks: a Toy forScientists or a Real Business Opportunity), 3rd May 2006, OlympicMuseum Lausanne. (Invited)
T. Ryhänen, Ubiquitous Sensing, Computing, and Communication,in Conference on Pervasive Networked Systems, from RFID to the Internet ofThings, Brussels, 6&7 March 2006. (Invited)
J. Huopaniemi and T. Ryhänen, Envisioning the connected lifestyle, Nokia Connection 2005, Helsinki, Finland, June 13-14, 2005. (Keynote)
T. Ryhänen, Die Zukunft der Micro/Nano-Technologien im Bereich derMobiltechnologie, Baltic Sea Region Micro/Nano-Technologieseminar,Berlin 10-11, February 2005. (Invited)
T. Ryhänen, Cool Portable Devices to Get Your Job Done, Conferenceto Explore Emerging IT Technologies, The 1st annual University ofIllinois Department of Computer Science Affiliates Conference, April28th - April 30th, 2005. (Invited)
T. Ryhänen, Micro / Nanotechnologies in the Future Mobile Technology, in Competitive City Regions Conference (Excellences in Micro and Nano Technologies Focused Regions and Centres), 9th-10th October 2003, Brussels. (Invited)
Patents
Selected patents:
T. Ryhänen, Sähköstaattisen voiman avulla takaisinkytketty kapasitiivinen anturi ja menetelmä sen aktiivisen elementin muodon ohjaamiseksi, SF 933670. (Vaisala Oy); Capacitive transducer feedback-controlled by means of electrostatic force and method for controlling the profile of the transducing element in the transducer, US Patent 5,531,128. (Vaisala Oy).
T. Ryhänen, Menetelmä ja laitteisto epäsymmetrisen paine-eroanturin takaisinkytkemiseksi, SF 934434. (Vaisala Oy); Method and apparatus for feedback-control of an asymmetric differential pressure transducer, US Patent 5,641,911. (Vaisala Oy)
T. Ryhänen, Surface-micromachined symmetrical differential pressure sensor with electrodes patterned into multiple conducting areas, US Patent 5,679,902; FI Patent 950715. (Vaisala Oy)
T. Ryhänen, Method of linearizing a flow velocity sensor, a linearized flow measurement apparatus and system, US Patent 5,750,903; FI Patent 946049. (Vaisala Oy)
T. Ryhänen, M. Lind, V. Ermolov, S. Silanto, Micromechanical tunable capacitor and an integrated tunable resonator, US Patent 6,744,335. (Nokia Mobile Phones)
T. Ryhänen, V. Ermolov, Method and arrangement for controlling micromechanical element, US Patent 7,027,282; FI Patent 109155. (Nokia Mobile Phones)
H. Nieminen, T. Ryhänen, V. Ermolov, S. Silanto, Micromechanical structure, US Patent 6,557,413; FI Patent 111457. (Nokia Mobile Phones)
T. Ryhänen, H.O. Scheck, M. Read, O. Larsson, O. Öhman, Tomas Lindström, Micro-replicated miniaturized electronic components, SE Patent 520714. (Nokia Corporation and Åmic AB)
T. Ryhänen, K. Hjelt, Improved sensing arrangement, FI Patent 115109. (Nokia Corporation)
A. Lappeteläinen, T. Ryhänen, M. Honkanen, Jari Hyyryläinen, Transponder aided wake-up and connection set-up, US Patent 7,072,697. (Nokia Corporation)
K. Hjelt, K. Nybergh, J. Hyyryläinen, T. Ryhänen, and S. Naukkarinen, Body fat monitoring system and method employing mobile terminal, US Patent 7,103,407. (Nokia Corporation)
