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Proceedings Paper

Modeling and optimization of microcoils for telemetric transmission at frequencies up to 20 MHz
Author(s): Sven Rehfuss; Claudia Marschner; Karl-Ludwig Krieger; Marcus Weser; Rainer Laur
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Paper Abstract

Wireless transmission of data and energy is needed e.g. in medical applications and autonomous sensor systems, where the maximum size or the use of batteries are limited by system specific restrictions. A possible solution for frequencies up to 20 Mhz is the use of a transformer which consists of an air-cored and two rectangular microcoils. For simulation and optimization of the system an accurate model of the micro coil is needed to predict the terminal impedance. The model must map the geometrical and material specific parameters into the terminal impedance to avoid the use of correction factors and to obtain a wide range of validity. An accurate model is presented and verified by measurements made with realized micro coils. The model is implemented into the system simulator SABER along with other components of a sensor system. An optimization was carried out to gain optimal coil parameters. The optimization strategy is presented and the optimization was carried out to gain optimal coil parameters. The optimization strategy is presented and the optimization results agree very well with measurements made with a realized sensor system.

Paper Details

Date Published: 10 March 1999
PDF: 12 pages
Proc. SPIE 3680, Design, Test, and Microfabrication of MEMS and MOEMS, (10 March 1999); doi: 10.1117/12.341205
Show Author Affiliations
Sven Rehfuss, Univ. of Bremen (Germany)
Claudia Marschner, Univ. of Bremen (Germany)
Karl-Ludwig Krieger, DaimlerChrysler AG (Germany)
Marcus Weser, Univ. of Bremen (Germany)
Rainer Laur, Univ. of Bremen (Germany)


Published in SPIE Proceedings Vol. 3680:
Design, Test, and Microfabrication of MEMS and MOEMS
Bernard Courtois; Wolfgang Ehrfeld; Selden B. Crary; Wolfgang Ehrfeld; Hiroyuki Fujita; Jean Michel Karam; Karen W. Markus, Editor(s)

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