×

ANTENNA ARRAY CALIBRATION FOR WIRELESS CHARGING

  • US 20160087338A1
  • Filed: 09/02/2015
  • Published: 03/24/2016
  • Est. Priority Date: 09/23/2014
  • Status: Active Grant
First Claim
Patent Images

1. A wireless charging station, comprising:

  • a plurality of antenna elements each comprising;

    a receiver and a transmitter coupled to an antenna; and

    a phase shift circuitry coupled to the transmitter and configured to adjust respective transmitter phase of the transmitter;

    a calibration antenna element comprising a calibration receiver and a calibration transmitter; and

    a controller coupled to the plurality of antenna elements and the calibration antenna element, the controller configured to;

    select a reference antenna element from the plurality of antenna elements wherein unselected ones of the plurality of antenna elements are non-reference antenna elements;

    transmit a first calibration signal from a transmitter of the reference antenna element;

    measure phase ax of the first calibration signal at a receiver of the reference antenna element;

    measure phase bx of the first calibration signal at the calibration receiver of the calibration antenna element; and

    for each of the non-reference antenna elements;

    transmit a second calibration signal from a transmitter of a non-reference antenna element;

    measure phase ay of the second calibration signal at a receiver of the non-reference antennaelement;

    measure phase by of the second calibration signal at the calibration receiver of the calibration antenna element;

    transmit a third calibration signal from the calibration transmitter of the calibration antenna element;

    measure phase cx of the third calibration signal at the receiver of the reference antenna element;

    measure phase cy of the third calibration signal at the receiver of the non-reference antenna element; and

    determine relative receiver phase error between the non-reference antenna element and the reference antenna element based on the phase ax, the phase bx, the phase cx, the phase ay, the phase by, and the phase cy.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×