Implantable multi-length RF antenna
First Claim
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1. A system comprising:
- an implantable telemetry circuit;
an implantable multi-length antenna electrically connected to the implantable telemetry circuit and configured to wirelessly transfer information electromagnetically at a specified first operating frequency range when in a first medium and at a specified second operating frequency range when in a different second medium, the implantable multi-length antenna including;
a first non-switchback segment;
a first switchback, electrically connected to the first non-switchback segment, the first switchback comprising first and second switchback segments; and
a second non-switchback segment electrically connected to the first switchback;
wherein the implantable multi-length antenna is configured to appear electrically as a first electrical length when in the first medium and as a different second electrical length when in the second medium;
wherein the second electrical length in the second medium is less than a physical length of the implantable multi-length antenna due at least in part to a capacitive coupling of the first switchback segment and the second switchback segment when in the second medium; and
wherein the first operating frequency range is specified using the first electrical length and the second operating frequency range is specified using the second electrical length.
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Abstract
A system and method for wirelessly transferring information electromagnetically at a specified first operating frequency range in a first medium and at a specified second operating frequency range in a second medium using an implantable multi-length antenna. The implantable multi-length antenna can be configured to appear electrically as a first electrical length in the first medium and as a different second electrical length in the second medium. In other examples, the first operating frequency range can be specified using the first electrical length and the second operating frequency range can be specified using the second electrical length.
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Citations
20 Claims
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1. A system comprising:
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an implantable telemetry circuit; an implantable multi-length antenna electrically connected to the implantable telemetry circuit and configured to wirelessly transfer information electromagnetically at a specified first operating frequency range when in a first medium and at a specified second operating frequency range when in a different second medium, the implantable multi-length antenna including; a first non-switchback segment; a first switchback, electrically connected to the first non-switchback segment, the first switchback comprising first and second switchback segments; and a second non-switchback segment electrically connected to the first switchback; wherein the implantable multi-length antenna is configured to appear electrically as a first electrical length when in the first medium and as a different second electrical length when in the second medium; wherein the second electrical length in the second medium is less than a physical length of the implantable multi-length antenna due at least in part to a capacitive coupling of the first switchback segment and the second switchback segment when in the second medium; and wherein the first operating frequency range is specified using the first electrical length and the second operating frequency range is specified using the second electrical length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method comprising:
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using an implantable multi-length antenna, wirelessly transferring information electromagnetically at a specified first operating frequency range when the implantable multi-length antenna is in a first medium and a specified second operating frequency range when the implantable multi-length antenna is in a different second medium; wherein the implantable multi-length antenna is configured to appear electrically as a first electrical length when in the first medium and as a different second electrical length when in the second medium, the implantable multi-length antenna including; a first non-switchback segment; a first switchback, electrically connected to the first non-switchback segment, the first switchback comprising first and second switchback segments; and a second non-switchback segment electrically connected to the first switchback; wherein the second electrical length in the second medium is less than a physical length of the implantable multi-length antenna due at least in part to a capacitive coupling of the first switchback segment and the second switchback segment when in the second medium; and wherein the first operating frequency range is specified using the first electrical length and the second operating frequency range is specified using the second electrical length. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification