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System and method for detecting and characterizing an object for wireless charging

  • US 10,277,062 B2
  • Filed: 07/30/2015
  • Issued: 04/30/2019
  • Est. Priority Date: 07/30/2015
  • Status: Active Grant
First Claim
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1. A system for detecting and characterizing an object proximate to a wireless power transmitting unit, comprising:

  • a transmit circuit having a transmit antenna, the transmit circuit configured to transmit at least one signal at a selectable harmonic frequency of a fundamental power transmit frequency;

    the transmit circuit configured to measure a response of the transmit antenna at the selectable harmonic frequency; and

    a controller circuit configured to characterize the object based on the response of the transmit antenna.

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