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ADJUSTABLE WIRELESS CIRCUITRY WITH ANTENNA-BASED PROXIMITY DETECTOR

  • US 20110250928A1
  • Filed: 04/13/2010
  • Published: 10/13/2011
  • Est. Priority Date: 04/13/2010
  • Status: Active Grant
First Claim
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1. An electronic device, comprising:

  • an antenna with which the electronic device transmits radio-frequency signals;

    phase and magnitude detector circuitry that is coupled to the antenna and that makes radio-frequency signal phase and magnitude measurements; and

    storage and processing circuitry that determines whether an external object is adjacent to the antenna by processing the radio-frequency signal phase and magnitude measurements.

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