Impedance matching in wireless power systems

  • US 9,843,228 B2
  • Filed: 07/27/2016
  • Issued: 12/12/2017
  • Est. Priority Date: 09/27/2008
  • Status: Active Grant
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First Claim
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1. A module for use in a wireless power transfer system, the module comprising:

  • a first inductive element formed by at least one loop of electrically conductive material; and

    additional circuitry connected to the first inductive element and comprising terminals for connection to a power supply or electrical load,wherein the first inductive element forms a high-Q resonator with at least a portion of the additional circuitry, the resonator having an intrinsic Q value greater than 100 for at least one resonant frequency between 10 kHz and 100 MHz; and

    wherein the additional circuitry comprises;

    a first capacitor connected in series with the first inductive element to form a first circuit pathway;

    a second capacitor connected in parallel to the first circuit pathway and forming a second circuit pathway; and

    a second inductive element connected in series with the first and second circuit pathways.

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