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Cascaded coils for multi-surface coverage in near field communication

  • US 9,281,118 B2
  • Filed: 12/10/2012
  • Issued: 03/08/2016
  • Est. Priority Date: 12/10/2012
  • Status: Active Grant
First Claim
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1. A device comprising:

  • at least one component defining top and bottom surfaces;

    a connecting wire;

    a cascaded coil antenna to include a first coil antenna and a second coil antenna that are connected in series through the connecting wire, wherein the first coil antenna is placed at the top surface and the second coil antenna is placed at the bottom surface of the at least one component; and

    a flux guide installed to cover top portion of the first coil antenna and spans to a top portion of the second coil antenna, wherein the flux guide at receive mode is configured to generate magnetic flux at the first coil antenna and the second coil antenna to induce current of the same phase, and wherein the flux guide at transmit mode facilitates the magnetic flux at the first coil antenna and the second coil antenna to generate magnetic fields of the same direction.

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