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Tuning a NFC antenna of a device

  • US 9,936,337 B2
  • Filed: 09/28/2015
  • Issued: 04/03/2018
  • Est. Priority Date: 05/23/2015
  • Status: Active Grant
First Claim
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1. A near field communication (NFC) payment object reader that is portable and wireless, wherein the NFC payment object reader benefits from intermittent tuning, the NFC payment object reader comprising:

  • an accelerometer;

    an NFC subsystem including an NFC antenna; and

    a tuning subsystem configured to tune the NFC antenna, the tuning subsystem configured to receive an input from the accelerometer and based on the input from the accelerometer, initiate one of a plurality of tuning processes depending on whether the NFC payment object reader is stationary or in motion, the plurality of tuning processes including;

    a first tuning process that is initiated in response to the tuning subsystem determining based on the input from the accelerometer that the NFC payment object reader is stationary, wherein the first tuning process results in a first tolerance for deviation from a desired frequency of the NFC antenna, anda second tuning process that is initiated in response to the tuning subsystem determining based on the input from the accelerometer that the NFC payment object reader is in motion, wherein the second tuning process results in a second tolerance for deviation from the desired frequency of the NFC antenna that is different from the first tolerance for deviation from the desired frequency.

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