title: Implantable Active Telemetry System using Microcoils.
abstract: 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.
authors.affiliation: Department Microsystems / Laser Medicine, Fraunhofer Institute for Biomedical Engineering, Ensheimer Strasse 48, D-66386 St. Ingbert, Germany.
authors.forename: Sohee
authors.initials: S
authors.lastname: Kim
authors.forename: Oliver
authors.initials: O
authors.lastname: Scholz