Cable Assembly for a Coupling Loop

• US 20070181331A1
• Filed: 01/30/2007
• Published: 08/09/2007
• Est. Priority Date: 11/01/2004
• Status: Active Grant

• Current Assignee: St. Jude Medical Luxembourg Holdings Ii S.A.R.L.
• Original Assignee: CardioMEMS Incorporated
• Inventors: Ellis, Michael, Miller, Donald, Kroh, Jason, Refermat, Robert
• Granted Patent: US 7,595,647 B2
• Time in Patent Office: Days
• US Class Current: 174/68.100
• CPC Class Codes: A61B 2560/0219 of externally powered implanted units
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/02014 Determining aneurysm
• CPC Class Codes: A61B 5/064 using markers A61B5/062 takes precedence
• CPC Class Codes: A61B 5/07 Endoradiosondes
• CPC Class Codes: H01B 11/20 Cables having a multiplicity of coaxial lines
• CPC Class Codes: H04B 5/73 for taking measurements, e.g. using sensing coils
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

A coupling loop or antenna is provided that can be used with a system that determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. A cable attached to the coupling loop provides maximum isolation between the energizing signal and the sensor signal by maximizing the distance between the coaxial cables that carry the signals and maintaining the relative positions of the coaxial cables throughout the cable assembly.

Claims

1. A cable, comprising:

a first coaxial cable;

a second coaxial cable;

an internal cable; and

an outer sheath surrounding the first coaxial cable, the second coaxial cable and the internal cable,

wherein the first coaxial cable and the second coaxial cable are positioned on opposite sides of the internal cable and a position of the first coaxial cable relative to the second coaxial cable is maintained along a length of the cable.

2. The cable of claim 1, wherein an angle between a center point of the first coaxial cable and a center point of the second coaxial cable is approximately 180 degrees relative to a center point of the internal cable.

3. The cable of claim 1, wherein the first coaxial cable and the second coaxial cable are twisted around the internal cable along the length of the cable.

4. The cable of claim 1, wherein a first shield surrounds the first coaxial cable, a second shield surrounds the second coaxial cable, a third shield surrounds the internal cable, and the first shield and the second shield are soldered to the third shield at a plurality of points along the length of the cable.

5. The cable of claim 1, further comprising a second internal cable and a third internal cable.

6. The cable of claim 5, wherein the second internal cable and the third internal cable are twisted pairs.

7. The cable of claim 5, wherein a fourth shield surrounds the second internal cable and a fifth shield surrounds the third internal cable.

8. The cable of claim 5, wherein a sixth shield surrounds the internal cable, the second internal cable and the third internal cable and the first coaxial cable and the second coaxial cable are between the sixth shield and the outer sheath.

9. A cable comprising:

a first coaxial cable;

a second coaxial cable;

a first internal cable;

a second internal cable;

a third internal cable; and

an outer sheath,

wherein the first internal cable is adjacent to the second internal cable, the third internal cable, the first coaxial cable and the second coaxial cable;

the second internal cable is adjacent to the first internal cable, the first coaxial cable, and the third internal cable;

the third internal cable is adjacent to the first internal cable, the second coaxial cable, and the second internal cable;

the first coaxial cable is adjacent to the first internal cable and the second internal cable;

the second coaxial cable is adjacent to the first internal cable and the third internal cable; and

the first coaxial cable and the second coaxial cable are on opposite sides of the first internal cable, and

wherein the outer sheath surrounds the first coaxial cable, the second coaxial cable, the first internal cable, the second internal cable, and the third internal cable.

10. The cable of claim 9, wherein an angle between a center point of the first coaxial cable and a center point of the second coaxial cable is approximately 180 degrees relative to a center point of the first internal cable and a position of the first coaxial cable relative to the second coaxial cable is maintained along a length of the cable.

11. The cable of claim 9, wherein the first coaxial cable and the second coaxial cable are twisted around the first internal cable along a length of the cable.

12. The cable of claim 9, wherein a first shield surrounds the first coaxial cable, a second shield surrounds the second coaxial cable, a third shield surrounds the first internal cable, and the first shield and the second shield are soldered to the third shield at a plurality of points along a length of the cable.

13. The cable of claim 9, wherein an inner shield surrounds the first internal cable, the second internal cable and the third internal cable and the first coaxial cable and the second coaxial cable are between the inner shield and the outer sheath.

14. The cable of claim 13, wherein the first coaxial cable and second coaxial cable are soldered to the inner shield at a plurality of points along a length of the cable.