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Modeling of the near field coupling between an external loop and an implantable spiral chip antenna in biosensor systems

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2 Author(s)
Simons, Rainee N. ; NASA Glenn Res. Center, Cleveland, OH ; Miranda, F.A.

In this paper, the near field coupling between an external hand-held loop and an implantable miniature (1times1 mm) printed square spiral chip antenna used in bio-MEMS sensors for contact-less powering and RF telemetry is investigated. The loop and the spiral are inductively coupled and effectively form a transformer. The numerical results include the quasi-stationary magnetic field pattern of the implanted antenna, near zone wave impedance as a function of the radial distance and the values of the lumped elements in the equivalent circuit model for the transformer

Published in:

Antennas and Propagation Society International Symposium 2006, IEEE

Date of Conference:

9-14 July 2006