Implantable medical device with air core antenna assembly
First Claim
1. An implantable medical device, comprising:
- an enclosure;
a multi-layer air-core antenna having a plurality of coil windings, wherein each coil winding forms a separate layer disposed in its own plane and wherein said coil windings are stacked one above the other in a direction perpendicular to the planes of said plurality of coil windings in a helix arrangement; and
a support cup within the enclosure retaining the antenna in a predetermined position within the enclosure.
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Accused Products
Abstract
An implantable medical device that includes an enclosure, an electrical module for the desired stimulation, sensing and communications functions, a power source, an air-core antenna, and supporting structures therefore. The antenna includes a quarter-elliptical shape that maximizes the antenna area to facilitate transmission of electromagnetic waves through the enclosure. A support structure is provided so that the antenna, the module and the battery self-align with each other and the enclosure. The support structure contains contacts to facilitate electrical connection of the antenna to the module and positions the module so that contacts thereon are in close proximity in plan and elevation to external electrical feed-throughs in the housing and the antenna contacts on the support structure. The support structure positions the antenna between the module and the housing, separated therefrom by a predetermined minimum distance to facilitate efficient coupling of electromagnetic waves to and/or from the antenna.
54 Citations
20 Claims
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1. An implantable medical device, comprising:
-
an enclosure;
a multi-layer air-core antenna having a plurality of coil windings, wherein each coil winding forms a separate layer disposed in its own plane and wherein said coil windings are stacked one above the other in a direction perpendicular to the planes of said plurality of coil windings in a helix arrangement; and
a support cup within the enclosure retaining the antenna in a predetermined position within the enclosure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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- 13. An implantable device comprising a sealable housing, an electronic module, a multi-layer air-core antenna electrically coupled to the module and having a plurality of coil windings, wherein each coil winding forms a separate layer disposed in its own plane and wherein said coil windings are stacked one above the other in a direction perpendicular to the planes of said plurality of coil windings in a helix arrangement, and a first support cup for locating both the module and the antenna within the housing, the first cup having a first portion for receiving the antenna in spaced-apart relationship to the housing and a second portion for receiving the module in spaced-apart relationship to the antenna to thereby position the module substantially superimposed over the antenna.
- 19. An implantable device comprising a housing, an electronic module, an air-core antenna electrically coupled to the module, and an insulating cup for locating both the module and the antenna within the housing, the cup having a first portion for receiving the antenna in spaced-apart relationship to the housing and a second portion for receiving the module in spaced-apart relationship to the antenna, wherein the antenna includes a multi-turn coil having a plurality of coil windings, wherein each coil winding forms a separate layer disposed in its own plane and wherein said coil windings are stacked one above the other in a direction perpendicular to the planes of said plurality of coil windings in a helix arrangement and comprising a total area and an interior air-core area, wherein the air-core area includes greater than half of the total area.
Specification