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Slot antenna for an implantable device

  • US 9,259,582 B2
  • Filed: 04/29/2011
  • Issued: 02/16/2016
  • Est. Priority Date: 04/29/2011
  • Status: Active Grant
First Claim
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1. An implantable medical device having a case configured to house components of the implantable medical device, the implantable medical device comprising:

  • an inductive coil coupled to a rechargeable battery, the inductive coil operative to inductively couple to an external coil and to transfer energy from the external coil to the rechargeable battery to recharge the rechargeable battery;

    a cutout formed in the case of the implantable medical device and filled with a dielectric material, wherein the cutout is operative to reduce eddy currents in the case during recharge of the rechargeable battery; and

    a slot antenna disposed within the case, the slot antenna operative to communicate with an external device through the cutout in the case;

    wherein the slot antenna comprises;

    a first dielectric layer;

    a slot formed in a first metal layer above the first dielectric layer; and

    a feed line formed in a second metal layer below the first dielectric layer.

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