Folded antennas for implantable medical devices
First Claim
1. An apparatus, comprising:
- an implantable medical device comprising;
a housing;
an implantable telemetry circuit carried within the housing;
a dielectric compartment, mechanically coupled to the housing, the dielectric compartment including first and second substantially parallel face portions, and a third face portion extending between the first and second face portions;
an implantable telemetry antenna, located at least partially within the dielectric compartment;
wherein the implantable telemetry circuit is electrically coupled to the implantable telemetry antenna and configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna; and
wherein the implantable telemetry antenna comprises;
a spiral conductor extending along and substantially conforming to the contours of the first, second, and third face portions of the dielectric compartment, wherein the spiral conductor comprises a planar spiral pattern including concentric turns; and
a loading portion, coupled to the spiral conductor and the implantable telemetry circuit, the loading portion comprising a conductive segment substantially perpendicular to a surface of the housing, the conductive segment of the loading portion configured to adjust an input impedance of the implantable telemetry antenna, to provide a specified input impedance range within a specified range of operating frequencies to be used for wireless information transfer.
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Accused Products
Abstract
In an example, an apparatus can include an implantable medical device comprising a housing, an implantable telemetry circuit carried within the housing, a dielectric compartment mechanically coupled to the housing, the dielectric compartment including first and second substantially parallel face portions and a third face portion extending between the first and second face portions, and an implantable telemetry antenna, located at least partially within the dielectric compartment. The implantable telemetry circuit can be electrically coupled to the implantable telemetry antenna and configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna. In an example the implantable telemetry antenna comprises a spiral conductor portion extending along the first, second, and third face portions. In an example the spiral conductor includes a cross section having a lateral width that can be greater than a sidewall height of the cross section.
41 Citations
18 Claims
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1. An apparatus, comprising:
an implantable medical device comprising; a housing; an implantable telemetry circuit carried within the housing; a dielectric compartment, mechanically coupled to the housing, the dielectric compartment including first and second substantially parallel face portions, and a third face portion extending between the first and second face portions; an implantable telemetry antenna, located at least partially within the dielectric compartment; wherein the implantable telemetry circuit is electrically coupled to the implantable telemetry antenna and configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna; and wherein the implantable telemetry antenna comprises; a spiral conductor extending along and substantially conforming to the contours of the first, second, and third face portions of the dielectric compartment, wherein the spiral conductor comprises a planar spiral pattern including concentric turns; and a loading portion, coupled to the spiral conductor and the implantable telemetry circuit, the loading portion comprising a conductive segment substantially perpendicular to a surface of the housing, the conductive segment of the loading portion configured to adjust an input impedance of the implantable telemetry antenna, to provide a specified input impedance range within a specified range of operating frequencies to be used for wireless information transfer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus, comprising:
an implantable medical device comprising; a housing; a dielectric compartment, mechanically coupled to the housing, the dielectric compartment including first and second substantially parallel face portions, and a third face portion extending between the first and second face portions; an implantable telemetry circuit carried within the housing; an implantable telemetry antenna, located at least partially within the dielectric compartment; wherein the implantable telemetry circuit is electrically coupled to the implantable telemetry antenna and configured to wirelessly transfer information electromagnetically using the implantable telemetry antenna; and wherein the implantable telemetry antenna comprises; a spiral conductor extending along and substantially conforming to the contours of the first, second, and third face portions of the dielectric compartment, the spiral conductor including one or more of a tapered cross-sectional lateral width or a tapered spacing between adjacent turns, along the spiral conductor, wherein the spiral conductor comprises a planar spiral pattern including concentric turns; and a loading portion, coupled to the spiral conductor portion and the implantable telemetry circuit, the loading portion comprising a conductive segment substantially perpendicular to a surface of the housing, the conductive segment of the loading portion configured to adjust an input impedance of the implantable telemetry antenna, to provide a specified input impedance range within a specified range of operating frequencies to be used for wireless information transfer.
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14. A method, comprising:
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providing an implantable medical device comprising; a dielectric compartment including first and second substantially parallel face portions, and a third face portion extending between the first and second face portions; and an implantable telemetry antenna, located at least partially within the dielectric compartment, the implantable telemetry antenna comprising; a spiral conductor portion extending along and substantially conforming to the contours of the first, second, and third face portions of the dielectric compartment, wherein the spiral conductor comprises a planar spiral pattern including concentric turns; and a loading portion, coupled to the spiral conductor portion and the implantable telemetry circuit, the loading portion comprising a conductive segment substantially perpendicular to a surface of the housing, the conductive segment of the loading portion configured to adjust an input impedance of the implantable telemetry antenna, to provide a specified input impedance range within a specified range of operating frequencies to be used for wireless information transfer; and wirelessly transferring information electromagnetically using the implantable telemetry antenna. - View Dependent Claims (15, 16, 17, 18)
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Specification