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 14:
15. Method for tuning a magnetic antenna with a loop interrupted one or several times, comprising:
providing a control signal for tuning the magnetic antenna in dependence on a phase position of a signal advancing into the magnetic antenna, and
controlling a tuning element of the magnetic antenna with the control signal to tune the magnetic antenna,
wherein the control signal for tuning the magnetic antenna is provided in dependence on a phase relationship between the signal advancing into the magnetic antenna and a phase signal,
deriving a signal from the signal advancing into the magnetic antenna to obtain a derived signal,
wherein the control signal for tuning the magnetic antenna is provided in dependence on a phase relationship between the derived signal and the phase signal,
wherein
the phase signal or a phase-shifted version of the phase signal, and
the derived signal or a phase-shifted version of the derived signal, are combined to obtain a combined signal,

controlling the tuning element with the control signal to control a DC component of the combined signal or a low-pass filtered version of the combined signal to a predetermined set value.