Patent ID: 11881637
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Telecommunications (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 15:
16. Method for tuning a magnetic antenna comprising a loop interrupted one or several times, comprising:
providing a control signal for tuning the magnetic antenna in dependence on an amplitude of a signal based on a magnetic field generated by the loop; and
controlling a tuning element of the magnetic antenna with the control signal to tune the magnetic antenna,
selecting, in dependence on the amplitude of the signal based on the magnetic field generated by the loop, a control signal parameter from a set of stored control signal parameters associated with corresponding amplitude values, the control signal being provided in dependence on the control signal parameter,
or determining, when a transmitting signal is transmitted at at least two different frequencies, a tuning direction in which the control signal is to be readjusted based on at least two amplitudes of the signal resulting from the at least two different frequencies of the transmitting signal based on the magnetic field generated by the loop, and readjusting the control signal in dependence on the determined tuning direction,
wherein the signal based that is based on the magnetic field generated by the loop is provided by an induction loop or induction coil.