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Wireless power system with position detection

  • US 9,685,826 B1
  • Filed: 10/12/2016
  • Issued: 06/20/2017
  • Est. Priority Date: 10/12/2016
  • Status: Active Grant
First Claim
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1. A wireless power system comprising:

  • a wireless power transfer system comprising;

    a radiating power transmitter configured to output electromagnetic radiation, wherein the radiating power transmitter includes;

    a magnetron having a hole and slot type cavity configuration;

    a rectification circuit coupled to the magnetron, wherein the rectification circuit includes a diode bridge circuit and a reservoir capacitor coupled across first and second terminals of the diode bridge circuit, wherein the rectification circuit is configured to have a ripple factor less than 5% such that an output frequency bandwidth of the magnetron is less than 10 MHz;

    an auxiliary dielectric material arranged within a slot of the hole and slot type cavity of the magnetron, wherein the auxiliary dielectric material is provided in an amount such that an output frequency of the magnetron is less than 2.5 GHz; and

    a directive element configured to focus the electromagnetic radiation into a beam in a particular direction; and

    a power receiver including a rectenna configured to receive the beam output from the radiating power transmitter when incident on the power receiver; and

    a positioning system configured to orient the radiating power transmitter relative to the power receiver to enable the power receiver to receive at least a portion of the beam output from the radiating power transmitter, the positioning system comprising;

    a locator receiver coupled to the radiating power transmitter, wherein the locator receiver includes a first plurality of antennae, a variable tuner, an RF power amplifier, and a processor; and

    a locator transmitter coupled to the power receiver, wherein the locator transmitter includes a second plurality of antennae each of which is coupled to an independent oscillator circuit, wherein each of the second plurality of antenna is configured to broadcast on a different frequency, wherein the locator receiver is configured to wirelessly determine a location of the locator transmitter relative to a location of the locator receiver without using triangulation.

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