Near-field antenna for wireless power transmission with four coplanar antenna elements that each follows a respective meandering pattern

  • US 10,447,093 B2
  • Filed: 06/29/2018
  • Issued: 10/15/2019
  • Est. Priority Date: 12/24/2015
  • Status: Active Grant
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First Claim
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1. A near-field antenna comprising:

  • a reflector;

    four distinct coplanar antenna elements, offset from the reflector, each of the four distinct antenna elements following respective meandering patterns, wherein;

    two antenna elements of the four coplanar antenna elements form a first dipole antenna along a first axis; and

    another two antenna elements of the four coplanar antenna elements form a second dipole antenna along a second axis perpendicular to the first axis;

    a power amplifier configured to feed electromagnetic signals to at least one of the first and second dipole antennas;

    an impedance-adjusting component configured to adjust an impedance of at least one of the first and second dipole antennas; and

    switch circuitry coupled to the power amplifier, the impedance-adjusting component, and the first and second dipole antennas, the switch circuitry being configured to;

    (i) switchably couple the first dipole antenna to the power amplifier and the second dipole antenna to the impedance-adjusting component, or(ii) switchably couple the second dipole antenna to the power amplifier and the first dipole antenna to the impedance-adjusting component.

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