Transponder system and method for readout of a passive transponder
AssigneeVesselSens GmbH
InventorsAlexej Domnich, Fabian Tutsch
Life of this patent
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Abstract
The invention relates to a transponder system having at least one passive transponder, which has a resonant circuit having a variable resonant frequency, and having a readout device, wherein the readout device is designed to modify a frequency of the readout signal to the variable resonant frequency of the resonant circuit. The invention additionally relates to a method for readout of a passive transponder, which has a resonant circuit having a variable resonant frequency.
Claims13
A transponder system comprising at least one passive transponder, wherein the passive transponder has at least one resonant circuit with a varying resonant frequency, and at least one reading device, wherein the reading device has at least one reading inductance, wherein a reading signal can be applied to the at least one resonant circuit by means of the reading inductance, and wherein the reading device is configured to match a frequency of the reading signal to the varying resonant frequency of the resonant circuit,
- wherein the reading device has an excitation unit for generating the reading signal and a feedback unit for detecting a feedback signal coming from the passive transponder,
- wherein the feedback unit is designed to transmit to the excitation unit a frequency matching signal which is determined on the basis of the feedback signal,
- wherein the excitation unit is designed to match the frequency of the reading signal on the basis of the frequency matching signal,
- wherein the excitation unit has a signal source, by means of which the reading signal can be generated, and
- wherein the reading device additionally has a directional coupler, to the output of which the signal source is electrically coupled and to the input of which the reading inductance is electrically coupled.
Dependencies are inferred from the claim text.