Power-stage antenna integrated system with high-strength shaft

• US 8,463,396 B2
• Filed: 05/06/2009
• Issued: 06/11/2013
• Est. Priority Date: 05/06/2009
• Status: Expired due to Fees

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien Limited (Medtronic Plc)
• Inventors: Podhajsky, Ronald J.
• Primary Examiner(s): Dvorak, Linda
• Assistant Examiner(s): AVIGAN, ADAM JOSEPH
• Application Number:
  US12/436,239
• Publication Number:
  US 20100286683A1
• Time in Patent Office: 1,497 Days
• Field of Search: 607100-102, 607/154, 607/156, 606/27, 606 33- 34, 606/41, 606 45- 50
• US Class Current: 607/101
• CPC Class Codes: A61B 18/18 by applying electromagnetic radiation, e.g. microwaves radiation therapy A61N5/00
• CPC Class Codes: A61B 18/1815 using microwaves
• CPC Class Codes: A61B 2018/00023 closed, i.e. without wound contact by the fluid
• CPC Class Codes: A61B 2018/00196 reciprocating lengthwise
• CPC Class Codes: A61B 2018/00642 with feedback, i.e. closed loop control
• CPC Class Codes: A61B 2018/1869 with an instrument interstitially inserted into the body, e.g. needles

Abstract

Disclosed is a microwave antenna assembly that includes proximal and distal radiating sections and a junction member. The proximal radiating section includes inner and outer conductors and DC power and neutral conductors. The inner conductor is disposed within the outer conductor and the DC power and neutral conductors are disposed radially outward therefrom. The junction member mates the distal and proximal radiating sections such that the distal and proximal radiating sections are positioned relative to one another. The junction member further includes a microwave signal amplifier (MSA) that receives a signal at a first energy level from the inner and outer conductors and a DC power signal from the DC power and neutral conductors. The MSA amplifies the signal from the first energy level to an additional, greater energy level. The junction member provides the microwave signal at the additional energy level to the proximal and distal radiating sections.

Claims

1. A microwave antenna assembly for applying microwave energy therapy comprising:

a proximal radiating section having an inner conductor, an outer conductor, a DC power conductor and a DC neutral conductor, each extending therethrough, the inner conductor disposed within the outer conductor and the DC power conductor and DC neutral conductor disposed radially outward from the outer conductor;

a distal radiating section distal the proximal radiating section; and

a junction member configured to mate the distal radiating section and proximal radiating section such that the proximal radiating section and the distal radiating sections are fixedly positioned relative to one another by a mechanically-engaging joint, the junction member further configured to include;

a microwave signal amplifier configured to receive a microwave signal at a first energy level from the inner conductor and the outer conductor and configured to receive a DC power signal from the DC power conductor and the DC neutral conductor, the microwave signal amplifier further configured to amplify the microwave signal from the first energy level to at least one second energy level, the at least one second energy level being greater than the first energy level,

wherein the junction member is further configured to provide the microwave signal at the second energy level to the proximal radiating section and the distal radiating section.

2. The microwave antenna assembly of claim 1 wherein the proximal radiating section and distal radiating section are adapted to radiate upon transmission of radiation through the antenna assembly.

3. The microwave antenna assembly of claim 2 wherein the proximal radiating section and the distal radiating section have a length which is proportional to an effective wavelength of the radiation transmitted by the antenna assembly.

4. The microwave antenna assembly of claim 1 wherein the distal radiating section comprises at least one of a metal, a dielectric material and a metamaterial.

5. The microwave antenna assembly of claim 1 further comprising a dielectric coating disposed at least partially over the antenna assembly.

6. The microwave antenna assembly of claim 1, wherein the junction member electrically insulates the distal radiating section and the proximal radiating section.

7. The microwave antenna assembly of claim 1 wherein the proximal radiating section has a length corresponding to a distance of one-quarter wavelength of radiation transmittable through the antenna assembly.

8. The microwave antenna assembly of claim 7 wherein the proximal radiating section is adapted to radiate along the length upon transmission of the radiation.

9. The microwave antenna assembly of claim 1 wherein the junction member further includes a first step and a second step such that the junction member comprises at least two different radial thicknesses,

wherein the first step is configured to receive at least one of the inner conductor, the outer conductor, the DC power conductor and the DC neutral conductor.

10. The microwave antenna assembly of claim 1 wherein the distal radiating section has a tapered distal end.