Implantable antenna for use with an implantable medical device
First Claim
1. An antenna arrangement for communicating radio frequency signals with an implantable medical device, comprising:
- a patch plane adapted for placement on an implantable medical device and adapted to exchange modulated electromagnetic energy with a surrounding transmission medium, the patch plane having a perimeter formed by a plurality of segments;
a ground plane of an electrically conducting material having an area which is larger than the patch plane, the ground plane being located in relation to the patch plane such that a perpendicular projection of the patch plane onto the ground plane falls entirely within the ground plane;
a dielectric substrate filling a volume between the patch plane and the ground plane;
a grounding member electrically connecting the patch plane to the ground plane, the grounding member being attached to a first of said segments of the perimeter; and
the substrate having high relative permittivity and extending a distance outside the volume between the patch plane and the ground plane with respect to at least a second of said segments of the perimeter.
1 Assignment
0 Petitions
Accused Products
Abstract
For wireless data exchange between an implantable medical device and an extracorporal unit by means of an antenna arrangement for communicating radio frequent signals, the antenna arrangement includes a patch plane having a perimeter, a ground plane of an electrically conducting material and a dielectric substrate filling a volume between the patch plane and the ground plane. The ground plane has an area which is larger than the patch plane and is located in relation to the patch plane such that a perpendicular projection of the patch plane onto the ground plane falls entirely within the ground plane. A grounding member connects the patch plane electrically to the ground plane at a first segment of the perimeter. The substrate has a comparatively high relative permittivity and extends a well-defined distance outside the volume between the patch plane and the ground plane with respect to at least one second segment of the perimeter. A non-conducting region thus is created outside the patch plane and therefore only a relatively small amount of electromagnetic losses will occur in this region.
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Citations
22 Claims
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1. An antenna arrangement for communicating radio frequency signals with an implantable medical device, comprising:
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a patch plane adapted for placement on an implantable medical device and adapted to exchange modulated electromagnetic energy with a surrounding transmission medium, the patch plane having a perimeter formed by a plurality of segments;
a ground plane of an electrically conducting material having an area which is larger than the patch plane, the ground plane being located in relation to the patch plane such that a perpendicular projection of the patch plane onto the ground plane falls entirely within the ground plane;
a dielectric substrate filling a volume between the patch plane and the ground plane;
a grounding member electrically connecting the patch plane to the ground plane, the grounding member being attached to a first of said segments of the perimeter; and
the substrate having high relative permittivity and extending a distance outside the volume between the patch plane and the ground plane with respect to at least a second of said segments of the perimeter. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12)
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7. An antenna arrangement according to claim 7 wherein the signal member extends through the ground plane via an electrically insulated feedthrough at a distance from the grounding member.
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13. An implantable medical device comprising:
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a device casing containing a plurality of electrical components;
an antenna arrangement disposed at an exterior of said casing for communicating radio frequency signals between an exterior of said device casing and at least one of said electrical components, said antenna arrangement comprising;
a patch plane adapted to exchange modulated electromagnetic energy with a surrounding transmission medium, the patch plane having a perimeter formed by a plurality of segments;
a ground plane of an electrically conducting material having an area which is larger than the patch plane, the ground plane being located in relation to the patch plane such that a perpendicular projection of the patch plane onto the ground plane falls entirely within the ground plane;
a dielectric substrate filling a volume between the patch plane and the ground plane;
a grounding member electrically connecting the patch plane to the ground plane, the grounding member being attached to a first of said segments of the perimeter; and
the substrate having high relative permittivity and extending a distance outside the volume between the patch plane and the ground plane with respect to at least a second of said segments of the perimeter. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification