Integrated antenna arrays for wireless power transmission

  • US 10,116,143 B1
  • Filed: 12/30/2014
  • Issued: 10/30/2018
  • Est. Priority Date: 07/21/2014
  • Status: Active Grant
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First Claim
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1. An antenna for transmitting focused radio-frequency (RF) waves towards a receiver to provide wireless power thereto, the antenna comprising:

  • an integrated antenna structure, wherein the integrated antenna structure;

    is on a multi-layer printed circuit board (PCB);

    includes a first group of unit cells with a planar inverted F-antenna (PIFA) transmitting element and a second group of unit cells without a transmitting element, and each respective unit cell of the first and second groups of unit cells is made of an artificial magnetic conductor (AMC) material, wherein;

    a ground element of the PIFA transmitting element is formed in a bottom layer of the multi-layer printed circuit board and the PIFA transmitting element is formed on a top layer of the multi-layer PCB,a metal layer associated with the AMC material is formed on a first inner layer of the multi-layer PCB that is between the top and bottom layers, anda backing metal layer associated with the AMC material is formed on a second inner layer of the multi-layer PCB that is between the top and bottom layers; and

    is configured to transmit, via the transmitting element, RF wireless power waves having a wavelength (λ

    ) to a wireless power receiver, andwherein the second group of unit cells without the transmitting element surrounds at least four sides of the first group of unit cells on the multi-layer printed circuit board and is configured to reflect at least some of the RF wireless power towards the wireless power receiver.

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