Low Frequency Reader Design Approach for Metallic Environments
Conference: Smart SysTech 2012 - European Conference on Smart Objects, Systems and Technologies
06/12/2012 - 06/13/2012 at Osnabrück, Deutschland
Proceedings: Smart SysTech 2012
Pages: 6Language: englishTyp: PDF
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Authors:
Jacobi, Rebekka C.; vom Bögel, Gerd; Grabmaier, Anton (Fraunhofer Institute for Microelectronic Circuits and Systems IMS, Duisburg, Germany)
Abstract:
Low frequency transponder systems are the method of choice in metallic and hydrous environments. To achieve high energy efficiency in mobile reader devices the antenna circuit is designed for a high quality factor. Metal in e.g. industrial and medical environments has a significant influence on such systems. An analysis of the influences of metal on the reader circuit impedance and the energy transfer function is presented. A smart approach to compensate the detuning of resonant circuits in mobile devices due to metallic environment is given. Finally applications in metallic environments from the current research are presented.