ANTENNA FOR AN IMPLANTABLE MEDICAL DEVICE
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Accused Products
Abstract
An apparatus and method for enabling far-field radio-frequency communications with an implantable medical device in which an antenna is embedded within a dielectric compartment of the device. A helical antenna may be employed to save space while still permitting far-field telemetry over a desired range of frequencies.
126 Citations
21 Claims
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1. (canceled)
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2. An implantable medical device, comprising:
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an implantable medical device housing including an implantable telemetry circuit; an implantable helical antenna configured to wirelessly transfer information electromagnetically within a specified operating frequency range, the implantable helical antenna having an axis substantially perpendicular to a return conductor for the implantable helical antenna; and a dielectric member housing the implantable helical antenna, the dielectric member proximate the implantable medical device housing. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An implantable medical device, comprising:
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an implantable medical device housing including an implantable telemetry circuit, wherein a conductive portion of the implantable medical device housing comprises a return conductor; an implantable helical antenna configured to wirelessly transfer information electromagnetically within a specified operating frequency range, the implantable helical antenna having an axis substantially perpendicular to the return conductor; a dielectric member housing the implantable helical antenna, the dielectric member proximate the implantable medical device housing; wherein the implantable helical antenna has an effective length corresponding to approximately one-quarter of a wavelength of the specified operating frequency range, and wherein the implantable helical antenna includes a helical conductor having a physical length less than one-quarter of the wavelength of the specified operating frequency range, the effective length of the implantable helical antenna being longer than the physical length due at least in part to the inductance and capacitance of the helical configuration of the implantable helical antenna. - View Dependent Claims (13)
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14. A method, comprising:
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using an implantable helical antenna in a dielectric member proximate an implantable medical device housing, the implantable medical device housing including an implantable telemetry circuit; and wirelessly transferring information electromagnetically within a specified operating frequency range using the implantable helical antenna, the implantable helical antenna having an axis substantially perpendicular to a return conductor. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification