Dipolar antenna system and related methods

• US 10,463,856 B2
• Filed: 06/13/2017
• Issued: 11/05/2019
• Est. Priority Date: 05/22/2009
• Status: Active Grant

• Current Assignee: Arizona Board of Regents (University of Arizona)
• Original Assignee: Arizona Board of Regents (University of Arizona)
• Inventors: Towe, Bruce C.
• Primary Examiner(s): Layno, Carl H
• Assistant Examiner(s): Piateski, Erin M
• Application Number:
  US15/621,208
• Publication Number:
  US 20170274200A1
• Time in Patent Office: 875 Days
• Field of Search: 607 62
• CPC Class Codes: A61N 1/05 for implantation or insertion into the body, e.g. heart electrode A61N1/06 takes precedence
• CPC Class Codes: A61N 1/3605 Implantable neurostimulators for stimulating central or peripheral nerve system
• CPC Class Codes: A61N 1/37205 Microstimulators, e.g. implantable through a cannula
• CPC Class Codes: A61N 1/37223 Circuits for electromagnetic coupling
• CPC Class Codes: A61N 1/3787 from an external energy source
• CPC Class Codes: H01P 11/00 Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
• CPC Class Codes: H01Q 9/00 Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
• CPC Class Codes: Y10T 29/49018 with other electrical component

Abstract

Some embodiments include a dipolar antenna system to electrically power an implantable miniature device and/or to stimulate bioelectrically excitable tissue, such as, for example, through microelectronic neurostimulation. Other related systems and methods are also disclosed.

Claims

1. An apparatus comprising:

a dipolar antenna comprising;

a first electrically conductive element having a first length and a first width; and

a second electrically conductive element having a second length and a second width, wherein;

the dipolar antenna is configured to;

be implanted in biological tissue;

facilitate stimulation of neural tissue; and

receive electromagnetic radiation comprising a dipolar electric field emitted from an electromagnetic wave exciter;

a combined length of the first length and the second length is greater than or equal to approximately 2 millimeters and less than or equal to approximately 5 centimeters; and

the first width and the second width are each less than or equal to approximately 1.5 millimeters.

2. The apparatus of claim 1, wherein:

the electromagnetic wave exciter comprises an additional dipolar antenna.

3. The apparatus of claim 1, wherein the electromagnetic radiation comprises:

(i) a peak power level greater than or equal to approximately 10 watts and less than or equal to approximately 100 watts; and

(ii) an average power level greater than or equal to approximately 1 watt and less than or equal to approximately 10 watts.

4. The apparatus of claim 1 further comprising:

at least one of an electronic device or an energy storage device electrically coupled to the electronic device, wherein the dipolar antenna is configured to provide energy to at least one of the electronic device or the energy storage device electrically coupled to the electronic device.

5. The apparatus of claim 1, wherein:

the dipolar antenna is devoid of an inductive coil.

6. The apparatus of claim 1, wherein:

the first electrically conductive element and the second electrically conductive element comprise a biocompatible material; and

the biocompatible material comprises at least one of platinum, tungsten, palladium, gold, or a biocompatible polymer.

7. The apparatus of claim 1, wherein:

the dipolar antenna is configured to pass through a lumen of at least one of a 14 gauge needle, a 15 gauge needle, a 16 gauge needle, a 17 gauge needle, an 18 gauge needle, a 19 gauge needle, a 20 gauge needle, a 21 gauge needle, or a 22 gauge needle of a syringe.

8. The apparatus of claim 1, wherein:

the dipolar antenna is configured to provide energy to at least one of;

(i) an electronic device comprising at least one of a bioelectronic medical sensor, a transducer, a communication system, or an actuator;

or

(ii) an energy storage device comprising a battery;

the dipolar antenna is devoid of an inductive coil;

the first electrically conductive element is approximately co-linear with the second electrically conductive element;

the first electrically conductive element and the second electrically conductive element comprise a biocompatible material;

the biocompatible material comprises at least one of platinum, tungsten, palladium, or gold;

the dipolar antenna is configured to pass through a lumen of at least one of a 14 gauge needle, a 15 gauge needle, a 16 gauge needle, a 17 gauge needle, an 18 gauge needle, a 19 gauge needle, a 20 gauge needle, a 21 gauge needle, or a 22 gauge needle of a syringe;

at least one of the first electrically conductive element or the second electrically conductive element comprises an insulating outer layer; and

the insulating outer layer comprises a biocompatible polymer.

9. The apparatus of claim 1 wherein:

the first electrically conductive element is approximately co-linear with the second electrically conductive element; and

the dipolar antenna is oriented approximately parallel to the electromagnetic wave exciter.

10. The apparatus of claim 1, wherein:

the electromagnetic wave exciter is configured to pulse the electromagnetic radiation for a time period of greater than or equal to approximately 1 microsecond and less than or equal to approximately 10 milliseconds, at a frequency of greater than or equal to approximately 0.5 pulses per second and less than or equal to approximately 2,000 pulses per second.

11. A method of manufacturing an energy supply for an electronic device, the method comprising:

providing a first electrically conductive element having a first length and a first width;

providing a second electrically conductive element having a second length and a second width;

coupling the first electrically conductive element to the electronic device; and

coupling the second electrically conductive element to the electronic device, wherein;

the first electrically conductive element and the second electrically conductive element form a dipolar antenna;

the dipolar antenna is configured to;

be implanted in biological tissue;

facilitate stimulation of neural tissue; and

receive electromagnetic radiation comprising a dipolar electric field emitted from an electromagnetic wave exciter;

a combined length of the first length and the second length is greater than or equal to approximately 2 millimeters and less than or equal to approximately 5 centimeters; and

the first width and the second width are each less than or equal to approximately 1.5 millimeters.

12. The method of claim 11, wherein:

the electronic device comprises at least one of a bioelectronic medical sensor, a transducer, a communication system, an actuator, or an energy storage device.

13. The method of claim 11, wherein:

the first electrically conductive element and the second electrically conductive element comprise a biocompatible material; and

the biocompatible material comprises at least one of platinum, tungsten, palladium, gold, or a biocompatible polymer.

14. The method of claim 11, wherein:

the dipolar antenna is configured to pass through a lumen of at least one of a 14 gauge needle, a 15 gauge needle, a 16 gauge needle, a 17 gauge needle, an 18 gauge needle, a 19 gauge needle, a 20 gauge needle, a 21 gauge needle, or a 22 gauge needle of a syringe.

15. The method of claim 11, wherein:

the electronic device comprises at least one of;

(i) a bioelectronic medical sensor, a transducer, a communication system, or an actuator;

or

(ii) an energy storage device comprising a battery;

the dipolar antenna is devoid of an inductive coil;

the first electrically conductive element is approximately co-linear with the second electrically conductive element;

the first electrically conductive element and the second electrically conductive element comprise a biocompatible material;

the biocompatible material comprises at least one of platinum, tungsten, palladium, gold, or a biocompatible polymer;

the dipolar antenna is configured to pass through a lumen of at least one of a 14 gauge needle, a 15 gauge needle, a 16 gauge needle, a 17 gauge needle, an 18 gauge needle, a 19 gauge needle, a 20 gauge needle, a 21 gauge needle, or a 22 gauge needle of a syringe;

at least one of the first electrically conductive element or the second electrically conductive element comprises an insulating outer layer; and

the insulating outer layer comprises a biocompatible polymer.

16. The method of claim 11, wherein:

the electromagnetic wave exciter comprises an additional dipolar antenna.

17. The method of claim 11, wherein:

the first electrically conductive element is approximately co-linear with the second electrically conductive element; and

the dipolar antenna is oriented approximately parallel to the electromagnetic wave exciter.

18. The method of claim 11, wherein:

the electromagnetic wave exciter is configured to pulse the electromagnetic radiation for a time period of greater than or equal to approximately 1 microsecond and less than or equal to approximately 10 milliseconds, at a frequency of greater than or equal to approximately 0.5 pulses per second and less than or equal to approximately 2,000 pulses per second.

19. The method of claim 11, wherein the electromagnetic radiation comprises:

(i) a peak power level greater than or equal to approximately 10 watts and less than or equal to approximately 100 watts; and

(ii) an average power level greater than or equal to approximately 1 watt and less than or equal to approximately 10 watts.

20. The method of claim 11, wherein:

the dipolar antenna is devoid of an inductive coil.