Title :
Modeling of the near field coupling between an external loop and an implantable spiral chip antenna in biosensor systems
Author :
Simons, Rainee N. ; Miranda, Félix A.
Author_Institution :
NASA Glenn Res. Center, Cleveland, OH
Abstract :
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
Keywords :
biomedical telemetry; biosensors; loop antennas; magnetic fields; microsensors; microstrip antennas; prosthetics; radiotelemetry; spiral antennas; transformers; RF telemetry; bio-MEMS sensors; biosensor systems; contact-less powering; external hand-held loop antenna; implantable miniature printed square spiral chip antenna; microelectromechanical sensors; near field coupling; near zone wave impedance; quasi-stationary magnetic field pattern; transformer; Biosensors; Coils; Coupling circuits; Equivalent circuits; Impedance; Inductors; Magnetic fields; Sensor phenomena and characterization; Spirals; Telemetry;
Conference_Titel :
Antennas and Propagation Society International Symposium 2006, IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
1-4244-0123-2
DOI :
10.1109/APS.2006.1710727
