Determination of the Optimal Carrier Frequency in Harsh Environments by Parameter Estimation

Conference: Smart SysTech 2015 - European Conference on Smart Objects, Systems and Technologies
07/16/2015 - 07/17/2015 at Aachen, Germany

Proceedings: ITG-Fb. 259: Smart SysTech 2015

Pages: 7Language: englishTyp: PDF

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Jacobi, Rebekka Carmen; Suess, Andreas; Boegel, Gerd vom (Fraunhofer IMS, Institute for Microelectronic Circuits and Systems, Duisburg, Germany)
Kolossa, Dorothea (Institute of Communication Acoustics, Ruhr-Universit├Ąt Bochum, Bochum, Germany)

Transponders in harsh medical or industrial environments are often embedded in or covered by metal. Eddy currents in conductive materials affect significantly the transmission of energy to a RFID or sensor transponder. With the help of a parameter estimation the carrier frequency can be adapted to optimally supply the transponder with energy. This adaptation leads, in cases where state-of-the-art systems do not find the optimum, to a significant improvement of the energy supply. Finally, efficient approaches are given to implement this technique in a real-time application for mobile readers.