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System and method to test and calibrate card-detection using active tag emulation

  • US 10,574,303 B1
  • Filed: 12/28/2018
  • Issued: 02/25/2020
  • Est. Priority Date: 12/28/2018
  • Status: Active Grant
First Claim
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1. A method for emulating a tag device that communicates via inductive coupling, the method comprising:

  • generating, by a transmitter unit of a reader device that communicates via inductive coupling, a transmitted field;

    receiving, by a tag emulation device, the transmitted field,wherein the tag emulation device emulates coupling change of the tag emulation device relative to the reader device by changing configuration parameters of the tag emulation device and by not moving the tag emulation device relative to the reader device, wherein changing configuration parameters includes changing a phase of a transmitted signal from the tag emulation device versus a phase of a carrier signal of the transmitted field from the reader device;

    detecting, by the reader device, an impedance change of an antenna and matching network system of the reader device,wherein the impedance change corresponds to the emulated coupling change of the tag emulation device relative to the reader device.

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