Dennis Hohlfeld
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Vibration energy harvesting with aluminum nitride-based piezoelectric devices
R Elfrink, TM Kamel, M Goedbloed, S Matova, D Hohlfeld, Y Van Andel, ...
Journal of Micromechanics and Microengineering 19 (9), 094005, 2009
4542009
Vacuum-packaged piezoelectric vibration energy harvesters: damping contributions and autonomy for a wireless sensor system
R Elfrink, M Renaud, TM Kamel, C De Nooijer, M Jambunathan, ...
Journal of Micromechanics and Microengineering 20 (10), 104001, 2010
1182010
Modeling and characterization of MEMS-based piezoelectric harvesting devices
TM Kamel, R Elfrink, M Renaud, D Hohlfeld, M Goedbloed, C De Nooijer, ...
Journal of Micromechanics and Microengineering 20 (10), 105023, 2010
802010
An all-dielectric tunable optical filter based on the thermo-optic effect
D Hohlfeld, H Zappe
Journal of optics A: Pure and applied Optics 6 (6), 504, 2004
732004
A thermally tunable, silicon-based optical filter
D Hohlfeld, M Epmeier, H Zappe
Sensors and Actuators A: Physical 103 (1-2), 93-99, 2003
642003
First autonomous wireless sensor node powered by a vacuum-packaged piezoelectric MEMS energy harvester
R Elfrink, V Pop, D Hohlfeld, TM Kamel, S Matova, C De Nooijer, ...
2009 IEEE International Electron Devices Meeting (IEDM), 1-4, 2009
512009
Microstructure with enlarged mass and electrode area for kinetic to electrical energy conversion
D Hohlfeld, M Goedbloed
US Patent 7,880,246, 2011
502011
Microstructure with enlarged mass and electrode area for kinetic to electrical energy conversion
D Hohlfeld, M Goedbloed
US Patent 7,880,246, 2011
502011
Microstructure with enlarged mass and electrode area for kinetic to electrical energy conversion
M Goedbloed, D Hohlfeld
EP Patent 2,066,015, 2009
50*2009
System and method for resonance frequency tuning of resonant devices
K Karakaya, D Hohlfeld
US Patent 8,154,176, 2012
402012
System and method for resonance frequency tuning of resonant devices
K Karakaya, D Hohlfeld
US Patent 8,154,176, 2012
402012
System and method for resonance frequency tuning of resonant devices
K Karakaya, D Hohlfeld
EP Patent 2,109,217, 2009
402009
System and Method for Resonance Frequency Tuning of Resonant Devices
K Karakaya, D Hohlfeld
US Patent App. 12/420,045, 2009
402009
Fabrication of gap-optimized CMUT
O Ahrens, A Buhrdorf, D Hohlfeld, L Tebje, J Binder
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 49 …, 2002
342002
Efficient extraction of thin-film thermal parameters from numerical models via parametric model order reduction
T Bechtold, D Hohlfeld, EB Rudnyi, M Günther
Journal of Micromechanics and Microengineering 20 (4), 045030, 2010
282010
Vibration energy harvesting with aluminum nitride-based piezoelectric devices
R Elfrink, TM Kamel, M Goedbloed, S Matova, D Hohlfeld, R Van Schaijk, ...
Proceedings of PowerMems, 249-252, 2008
272008
Harvesting mechanical energy for ambient intelligent devices
B Op het Veld, D Hohlfeld, V Pop
Information Systems Frontiers 11 (1), 7-18, 2009
252009
Electromagnetic Energy Scavenger Based on Moving Permanent Magnets
D Hohlfeld, R Vullers
US Patent App. 12/665,874, 2010
232010
ELECTROMAGNETIC ENERGY SCAVENGER BASED ON MOVING PERMANENT MAGNETS
D Hohlfeld, R Vullers
EP Patent 2,162,975, 2010
232010
ELECTROMAGNETIC ENERGY SCAVENGER BASED ON MOVING PERMANENT MAGNETS
D HOHLFELD, R VULLERS
WO Patent 2,009,003,915, 2009
232009
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