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Implantable active telemetry system using microcoils

: Kim, S.; Scholz, O.

IEEE Engineering in Medicine and Biology Society -EMBS-:
27th Annual Conference of the 2005 IEEE Engineering in Medicine and Biology 2005. Proceedings : Innovation from Biomolecules to Biosystems
New York: IEEE Press, 2005
ISBN: 0-7803-8740-6
ISBN: 0-7803-8741-4
IEEE Engineering in Medicine and Biology Society (Annual International Conference EMBC) <27, 2005, Shanghai, China>
Conference Paper
Fraunhofer IBMT ()

The use of microcoils in an active telemetry system that is intended to be implanted in the body for biomonitoring applications is presented in this paper. To achieve a moderate transmission range, active telemetry was realized instead of passive telemetry by load modulation, which is often used in systems incorporating microcoils. Sample microcoils with a diameter of 1 cm and 16 windings were fabricated and used for tests. A telemetry system operating at the 27 MHz ISM band was constructed using a small number of circuit components. The performance of the constructed system was evaluated in a laboratory condition. The transmission range of the realized system was measured up to 20 cm when a biological tissue in a thickness of 1 cm was applied between the transmitter and the receiver.