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Antenna selection for interference avoidance

  • US 10,476,569 B1
  • Filed: 11/28/2016
  • Issued: 11/12/2019
  • Est. Priority Date: 11/28/2016
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a first electronic device comprising;

    an enclosure;

    a processing device disposed within the enclosure;

    a wireless local area network (WLAN) radio coupled to the processing device;

    a primary antenna coupled to the WLAN radio and disposed within the enclosure; and

    a diversity antenna coupled to the WLAN radio and disposed within the enclosure, wherein the WLAN radio is to cause the primary antenna, the diversity antenna, or both to radiate electromagnetic energy in an industrial, scientific and medical (ISM) radio band; and

    a second electronic device disposed within a dongle enclosure, the dongle enclosure being part of a power cable configured to supply power to the first electronic device and the second electronic device, wherein the second electronic device comprises a personal area network (PAN) radio and a third antenna coupled to the PAN radio, wherein the PAN radio is to cause the third antenna to radiate electromagnetic energy in the ISM radio band, wherein the processing device is to;

    set the PAN radio into a channel sweep mode in which the PAN radio measures an amount of power received by the third antenna on a plurality of channels of the PAN radio;

    cause the WLAN radio to transmit a sequence of data packets using only the primary antenna during a first period;

    cause the WLAN radio to transmit the sequence of data packets using only the diversity antenna during a second period;

    receive a first metric from the PAN radio, the first metric indicative of a first amount of power received on the third antenna on the plurality of channels during the first period;

    receive a second metric from the PAN radio, the second metric indicative of a second amount of power received on the third antenna on the plurality of channels during the second period;

    select one of the primary antenna or the diversity antenna as a selected antenna based on which of the first metric and the second metric is lower;

    cause the WLAN radio to communicate WLAN data with a third device using the selected antenna during a third period, wherein the third period is after the first period and the second period; and

    cause the PAN radio to communicate PAN data with a fourth device using the third antenna during the third period, wherein at least a portion of the WLAN data and at least a portion of the PAN data are communicated concurrently in the ISM radio band.

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