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US 2004/0176811 A1Published application
Antenna for an implantable medical device
AssigneeCardiac Pacemakers, Inc.
InventorsJeffrey A. Von Arx, William R. Mass, Scott T. Mazar, Mark D. Amundson
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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.
Claims20
An implantable medical device, comprising:
- a housing for containing electronic circuitry;
- an antenna embedded in a dielectric compartment;
- and
- circuitry within the housing connected to the antenna for transmitting and receiving a modulated radio-frequency carrier at a specified carrier frequency.
1 more element
A method for transmitting and receiving radio-frequency signals in an implantable medical device, comprising:
- transmitting or receiving a modulated radio-frequency carrier at a specified carrier frequency to or from an antenna embedded within a dielectric compartment of the device;
- and,
- matching the impedance of the antenna to the transmitting/receiving circuitry at a specified carrier frequency by loading the antenna with inductance or capacitance using an antenna tuning circuit, wherein a significant portion of radio-frequency energy delivered to the antenna at the specified frequency as far-field radiation.
Dependencies are inferred from the claim text.