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Sebastian Stöcklin

Sebastian Stöcklin

Sebastian Stöcklin

Laboratory for Electrical Instrumentation
Department of Microsystems Engineering (IMTEK)
University of Freiburg
Georges-Köhler-Allee 106-04-004
79110 Freiburg
Phone: +49 (0)761 203-7157

Research project

Wireless power and data transmission concepts have gained a widespread use with the emergence of RFID systems. Promising future applications are within the fields of biomedical implants, portable electronics or small-scale IoT sensors, requiring both high power transfer efficiency and resistance against misalignment for the energy transmission and very-high-bit-rate capabilities for the data communication interface.  However, the efficiency of wireless power transfer systems do not scale well with the ongoing miniaturization of such systems, while misalignment and tilt decrease the efficiency even further due to variation of the optimal load characteristics. Moreover, classical RFID interfaces scale well for data rates up to several 100 kBit/s, but to not allow for transmission in the MBit/s range while establishing efficient power transfer.

As a result, the proposed research project targets a highly-integrated, miniaturized, efficient and fast near-field power and communication link that might serve as a core component of next-generation implants and sensors. Therefore, the electromagnetic interface is modeled considering higher order loss effects and multi-coil topologies, and subsequently optimized for the highest possible power transfer efficiency under a given size restriction. To maintain this power efficiency under a large set of circumstances, principles of dynamic impedance matching are investigated and applied to both transmitter and receiver circuits, in particular considering adaptive power amplifiers and concepts of maintaining the inductive link within its maximum efficiency point. As far as the communication interface is considered, methods of increasing the data rate, as using higher frequency bands or higher-order modulation schemes, will be investigated and implemented.

Curriculum Vitae

03/2015 - Today

PhD Studies

University of Freiburg

10/2012 - 01/2015

M.Sc. in Microsystems Engineering at University of Freiburg with focus on

  • circuits & systems
  • sensors & actuators
10/2009 - 09/2012B.Sc. in Microsystems Engineering at University of Freiburg


Journal papers

  • S. Stöcklin, A. Yousaf, T. Volk and L. Reindl, "Efficient Wireless Powering of Biomedical Sensor Systems for Multichannel Brain Implants," in IEEE Transactions on Instrumentation and Measurement, vol. 65, no. 4, pp. 754-764, April 2016. doi: 10.1109/TIM.2015.2482278

Conference papers

  • S. Stöcklin, A. Yousaf, L. Reindl, “Adaptive Elektronik zur effizienten drahtlosen Energieversorgung biomedizinischer Implantate,” 18. GMA/ITG Fachtagung Sensoren und Messysteme, Nürnberg, Germany, 2016.
  • S. Stöcklin, A. Yousaf, T. Volk, L. Reindl, “A Maximum Efficiency Point Tracking System for Wireless Powering of Biomedical Implants,” Eurosensors XXIX, Freiburg, Germany, 2015.
  • S. Stöcklin, T. Volk, A. Yousaf, L. Reindl, “A Programmable and Self-Adjusting Class E Amplifier for Efficient Wireless Powering of Biomedical Implants,” 37th Annual International Conference of the IEEE EMBS, Milano, Italy, 2015.
  • C. Bentler, S. Stöcklin, T. Stieglitz, „Blueprint for implantable Brain Computer Interfaces made of commercial off-the-shelf components,“ NANS- NIC Joint Meeting, Baltimore, USA, 2016.
  • T. Volk, A. Yousaf, J. Albesa, S. Stöcklin et al., „Wireless Power Distribution System for Brain Implants,“ IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Pisa, Italy, 2015.
  • T. Volk, C. Bentler, S. Stöcklin et al., „Novel Concept for a Wireless and Batteryless Brain Implant Array,“ 12th International Multi-Conference on Systems, Signals and Devices, Sfax, Tunesia, 2015.
  • T. Volk, S. Stöcklin et al., „Inductive Micro-Tunnel for an Efficient Power Transfer,“ Eurosensors XXIX, Freiburg, Germany, 2015.
  • G.U. Gamm, S. Stöcklin, L. Reindl, "Wake-up receiver operating at 433 MHz," 11th International Multi-Conference on Systems, Signals & Devices (SSD), Barcelona, Spain, 2014.


by Florian Opitz last modified Aug 02, 2016 03:54 PM
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