MULTI-BAND ANTENNA FOR IMPLANTABLE DEVICE
First Claim
Patent Images
1. A multi-band implantable telemetry system, comprising:
- an implantable telemetry circuit coupled to an implantable antenna, the implantable telemetry circuit configured to drive the implantable antenna in a transmit mode and receive information from the implantable antenna in a receive mode using at least one of a first specified operating frequency or a second specified operating frequency, the second specified operating frequency different than the first specified operating frequency;
wherein the implantable antenna is configured to wirelessly send information electromagnetically from within a biological medium or wirelessly receive information electromagnetically in the biological medium using the first and second specified operating frequencies, the implantable antenna including a switchback portion including;
a first major segment having a first length;
a second major segment having a second length;
a third major segment having a third length; and
wherein the first, second, and third major segments are arranged in a switchback configuration;
wherein the first specified operating frequency is provided at a fundamental mode of the implantable antenna, wherein the fundamental mode frequency of the implantable antenna is different than the fundamental mode frequency of an unfolded antenna of equal total length, the difference provided using at least the first length of the first major segment; and
wherein the second specified operating frequency is provided at a first higher-order mode of the implantable antenna using a total length of the implantable antenna.
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Abstract
This document discusses, among other things, a system and method for wirelessly sending information electromagnetically at one of a first or a second specified operating frequency from within a biological medium, or receiving information electromagnetically at one of the first or second specified operating frequencies in the biological medium, using an implantable antenna including a switchback portion having multiple segments. The first specified operating frequency and the second specified operating frequency can be provided using the multiple segments.
50 Citations
24 Claims
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1. A multi-band implantable telemetry system, comprising:
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an implantable telemetry circuit coupled to an implantable antenna, the implantable telemetry circuit configured to drive the implantable antenna in a transmit mode and receive information from the implantable antenna in a receive mode using at least one of a first specified operating frequency or a second specified operating frequency, the second specified operating frequency different than the first specified operating frequency; wherein the implantable antenna is configured to wirelessly send information electromagnetically from within a biological medium or wirelessly receive information electromagnetically in the biological medium using the first and second specified operating frequencies, the implantable antenna including a switchback portion including; a first major segment having a first length; a second major segment having a second length; a third major segment having a third length; and wherein the first, second, and third major segments are arranged in a switchback configuration; wherein the first specified operating frequency is provided at a fundamental mode of the implantable antenna, wherein the fundamental mode frequency of the implantable antenna is different than the fundamental mode frequency of an unfolded antenna of equal total length, the difference provided using at least the first length of the first major segment; and wherein the second specified operating frequency is provided at a first higher-order mode of the implantable antenna using a total length of the implantable antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A multi-band implantable telemetry system, comprising:
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an implantable telemetry circuit coupled to an implantable antenna, the implantable telemetry circuit configured to drive the implantable antenna in a transmit mode and receive information from the antenna in a receive mode using one of a first specified operating frequency in a Medical Implant Communications Service (MICS) band frequency range extending from approximately 402 MHz to approximately 405 MHz, or a second specified operating frequency in an Industrial-Scientific-Medical (ISM) band frequency range extending from approximately 902 MHz to approximately 928 MHz; wherein the implantable antenna is configured to wirelessly send information electromagnetically from within an implantable dielectric compartment in a biological medium and to wirelessly receive information electromagnetically in the implantable dielectric compartment in the biological medium using the first and second specified operating frequencies, the implantable antenna including; a switchback portion, the switchback portion including a first major segment having a first length, a second major segment having a second length, and a third major segment having a third length, wherein the first, second, and third major segments are arranged in a switchback configuration; wherein the first specified operating frequency is provided at a fundamental mode of the implantable antenna, wherein the fundamental mode frequency of the implantable antenna is different than a fundamental mode frequency of an unfolded antenna of equal total length, the difference provided using at least the first length of the first major segment; wherein the second specified operating frequency is provided at a first higher-order mode of the implantable antenna using a total length of the implantable antenna; wherein, using the first length of the first major segment, the switchback portion of the implantable antenna is configured to; (1) optimize surface current cancellation between the first major segment and the second major segment at the fundamental mode of the implantable antenna to provide the first specified operating frequency; and (2) minimize surface current cancellation between the first major segment and the second major segment at the first higher-order mode of the implantable antenna to provide the second specified operating frequency; and wherein each of the first length of the first major segment, the second length of the second major segment, and the third length of the third major segment separately correspond to one-eighth of the effective wavelength of the first specified operating frequency. - View Dependent Claims (17, 18)
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19. A method comprising:
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driving an implantable antenna in a transmit mode and receiving information from the implantable antenna in a receive mode using at least one of a first specified operating frequency or a second specified operating frequency different than the first specified operating frequency; wirelessly sending information electromagnetically at one of the first or second specified operating frequencies using the implantable antenna from within a biological medium or wirelessly receiving information electromagnetically at one of the first or the second specified operating frequencies using the implantable antenna in the biological medium, the implantable antenna including a switchback portion, the switchback portion including a first major segment having a first length, a second major segment having a second length, and a third major segment having a third length, the first, second, and third major segments arranged in a switchback configuration; providing the first specified operating frequency at a fundamental mode of the implantable antenna, wherein the fundamental mode frequency of the implantable antenna is different than the fundamental mode frequency of an unfolded antenna of equal total length, the difference provided using at least the first length of the first major segment; and providing the second specified operating frequency at a first higher-order mode of the implantable antenna using a total length of the implantable antenna. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification