Twisted pair cable with cable separator

• US 7,196,271 B2
• Filed: 03/03/2003
• Issued: 03/27/2007
• Est. Priority Date: 03/13/2002
• Status: Expired due to Term

• Current Assignee: Belden CDT (Canada) Inc. (Belden Inc.)
• Original Assignee: Belden CDT (Canada) Inc. (Belden Inc.)
• Inventors: Cornibert, Jacques, Walling, Jorg-Hein, Yameogo, Christian
• Primary Examiner(s): Nguyen; Chau N.
• Application Number:
  US10/378,398
• Publication Number:
  US 20040055781A1
• Time in Patent Office: 1,485 Days
• Field of Search: 174/113.R, 174/113.C, 174/131.A, 385/103, 385/110, 385/113
• US Class Current: 174/113.00C
• CPC Class Codes: H01B 11/06 with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens

Abstract

Generally, aspects of embodiments of the invention include cable separator spline which comprises a plurality of longitudinally extending walls joined along a central axis of the spline, and a plurality of longitudinally extending channels. Each longitudinally extending channel is defined by a pair of the longitudinally extending walls, where the pair of longitudinally extending walls includes a first wall substantially thicker than a second wall. Other embodiments include a cable separator spline assembly having a plurality of longitudinally extending walls joined along a central axis of the spline, and a plurality of longitudinally extending channels. Each longitudinally extending channel is defined by a pair of the longitudinally extending walls, wherein a pair of opposing longitudinally extending walls have defined through them a common gap defining two separate sub-splines having T-shaped cross-sections. Embodiments of the invention feature various spline shapes as well as various internal structures and materials.

Claims

1. A data cable, comprising:

a plurality of data transmission media including first, second, third and fourth data transmission media; and

a separator spline positioned between the data transmission media, the separator spline including;

a plurality of longitudinally extending walls joined along a central axis of the spline; and

a plurality of longitudinally extending channels, each longitudinally extending channel defined by a pair of the longitudinally extending walls;

wherein the pair of longitudinally extending walls includes a first wall substantially thicker than a second wall;

wherein, absent the separator spline, the first and second data transmission media would be more strongly coupled to one another than are the first and third data transmission media; and

wherein the plurality of data transmission media and the separator spline are arranged such that the first wall lies between the first and second data transmission media and the second wall lies between the first and third data transmission media.

2. The spline of claim 1, wherein the pair of longitudinally extending walls include flanged edges.

3. The spline of claim 2, wherein the flanged edges of the pair of longitudinally extending walls extend sufficiently far around the longitudinally extending channel defined by the pair of longitudinally extending walls to retain a twisted pair cable lying therein in a stable position.

4. The spline of claim 3, wherein a transverse cross-section of each longitudinally extending channel is a substantially polygonal void.

5. The spline of claim 3, wherein a transverse cross-section of each longitudinally extending channel is a substantially circular void.

6. The spline of claim 1, wherein the first wall includes a surface defining an internal hollow region surrounded by the first wall.

7. The spline of claim 6, wherein a longitudinally extending wall has a flanged edge.

8. The spline of claim 6, wherein the pair of longitudinally extending walls include flanged edges.

9. The spline of claim 8, wherein the flanged edges of the pair of longitudinally extending walls extend sufficiently far around the longitudinally extending channel defined by the pair to retain a twisted pair cable lying therein in a stable position.

10. The data cable of claim 1, wherein the plurality of longitudinally extending walls comprise a conductive material.

11. The data cable of claim 10, wherein the conductive material is disposed on the surface of the plurality of longitudinally extending walls.

12. The data cable of claim 10, wherein the conductive material is embedded inside the plurality of longitudinally extending walls.

13. A data cable separator spline, comprising:

a plurality of longitudinally extending walls joined along a central axis of the spline; and

a plurality of longitudinally extending channels, each longitudinally extending channel defined by a pair of the longitudinally extending walls;

wherein the pair of longitudinally extending walls includes a first wall substantially thicker than a second wall; and

wherein the separator spline is substantially non-conductive.

14. A high performance data cable comprising:

a plurality of twisted pairs of insulated conductors including a first twisted pair, a second twisted pair, and a third twisted pair;

a cable separator spline having;

a plurality of longitudinally extending walls joined along a central axis of the spline; and

a plurality of longitudinally extending channels, each longitudinally extending channel defined by a pair of the longitudinally extending walls;

wherein the pair of longitudinally extending walls includes a first wall substantially thicker than a second wall;

wherein, absent the cable separator spline, coupling between the first pair and the third pair would be stronger than coupling between the first pair and the second pair; and

wherein the first wall of the cable separator spline is positioned so as to separate the first twisted pair from the third twisted pair.

15. The high performance data cable of claim 14, wherein the plurality of longitudinally extending walls comprise:

a conductive material.

16. The high performance data cable of claim 15, wherein the conductive material is disposed on the surface of the plurality of longitudinally extending walls.

17. The high performance data cable of claim 15, wherein the conductive material is embedded inside the plurality of longitudinally extending walls.

18. The high performance data cable of claim 14, wherein the plurality of longitudinally extending walls comprise:

a magnetic shield material.

19. The high performance data cable of claim 18, wherein the magnetic shield material is disposed on the surface of the plurality of longitudinally extending walls.

20. The high performance data cable of claim 18, wherein the magnetic shield material is embedded inside the plurality of longitudinally extending walls.

21. The high performance data cable of claim 18, wherein the magnetic shield material comprises ferrite.

22. The high performance data cable of claim 14, wherein the first wall of the cable separator spline includes a surface defining an internal hollow region surrounded by the first wall.

23. The high performance data cable of claim 22, wherein a longitudinally extending wall of the cable separator spline has a bifurcated edge.

24. The high performance data cable of claim 22, wherein a longitudinally extending wall of the cable separator spline has a flanged edge.

25. The high performance data cable of claim 24, wherein a longitudinally extending wall of the cable separator spline has a bifurcated edge.

26. The high performance data cable of claim 24, wherein the pair of longitudinally extending walls of the cable separator spline include flanged edges.

27. The high performance data cable of claim 26, wherein the flanged edges of the pair of longitudinally extending walls extend sufficiently far around the longitudinally extending channel defined by the pair to retain a twisted pair cable lying therein in a stable position.

28. The high performance data cable of claim 14, wherein a longitudinally extending wall of the data cable has a flanged edge.

29. The high performance data cable of claim 28, wherein the pair of longitudinally extending walls include flanged edges.

30. The high performance data cable of claim 29, wherein the flanged edges extend sufficiently far around the longitudinally extending channel defined by the pair to retain a twisted pair cable lying therein in a stable position.

31. A high performance data cable comprising:

a plurality of twisted pairs of insulated conductors including a first twisted pair and a second twisted pair;

a jacket;

a plurality of longitudinally extending radial walls;

a plurality of longitudinally extending channels, each longitudinally extending channel defined by a pair of the longitudinally extending radial walls;

wherein the pair of longitudinally extending radial walls includes a first wall substantially thicker than a second wall;

wherein, absent the plurality of longitudinally extending radial walls, coupling between the first twisted pair and the second twist pair would be greater than coupling between the first twisted pair and any other twisted pairs of the plurality of twisted pairs of insulated conductors; and

wherein the plurality of twisted pairs of insulated conductors are arranged within the cable such that the first wall separates the first twisted pair from the second twisted pair.

32. The cable separator of claim 31, further comprising a jacket surrounding the cable, and wherein the walls are joined to the jacket on an inner surface thereof.

33. The cable separator of claim 32, wherein a longitudinally extending wall has a bifurcated edge.

34. The cable separator of claim 32, wherein a longitudinally extending wall has a flanged edge.

35. The cable separator of claim 34, wherein a transverse cross-section of each longitudinally extending channel is a substantially polygonal void.

36. The cable separator of claim 34, wherein a transverse cross-section of each longitudinally extending channel is a substantially circular void.

37. The cable separator of claim 32, wherein the first wall includes a surface defining an internal hollow region surrounded by the first wall.

38. A data cable, comprising:

a plurality of data transmission media; and

a separator positioned between the plurality of data transmission media, the separator including;

a plurality of longitudinally extending radial walls; and

a plurality of longitudinally extending channels, each longitudinally extending channel defined by a pair of the longitudinally extending radial walls;

wherein the pair of longitudinally extending radial walls includes a first wall substantially thicker than a second wall; and

wherein ones of the plurality of data transmission media having high crosstalk, absent the plurality of longitudinally extending radial walls, are separated from one another by the first wall.

39. The data cable of claim 38, wherein the plurality of longitudinally extending walls comprise a conductive material.

40. The data cable of claim 39, wherein the conductive material is disposed on the surface of the plurality of longitudinally extending walls.

41. The data cable of claim 39, wherein the conductive material is embedded inside the plurality of longitudinally extending walls.

42. A data cable separator, comprising:

a plurality of longitudinally extending radial walls;

a plurality of longitudinally extending channels, each longitudinally extending channel defined by a pair of the longitudinally extending radial walls; and

a conductive material disposed on the outer surface of all of the plurality of longitudinally extending radial walls;

wherein the pair of longitudinally extending radial walls includes a first wall substantially thicker than a second wall.

43. The data cable separator of claim 42, wherein the plurality of longitudinally extending walls comprise a magnetic shield material.

44. The data cable separator of claim 43, wherein the magnetic shield material is embedded inside the plurality of longitudinally extending walls.

45. The data cable separator of claim 43, wherein the magnetic shield material comprises ferrite.

46. A data communications cable, comprising:

a separator spline that includes a plurality of longitudinally extending walls joined along a central axis of the spline, and a plurality of longitudinally extending channels, each longitudinally extending channel defined by a pair of the longitudinally extending walls;

a plurality of twisted pairs of insulated conductors;

wherein the pair of longitudinally extending walls includes a first wall substantially thicker than a second wall;

wherein the separator spline and the plurality of twisted pairs are arranged such that a first set of said twisted pairs having high crosstalk, absent the separator spline, are separated from one another by the first wall;

wherein a second set of said twisted pairs having lower crosstalk than the first set, absent the separator spline, are separated from one another by the second wall; and

wherein the plurality of longitudinally extending walls are each defined by a pair of parallel surfaces.

47. The spline of claim 46, wherein the plurality of longitudinally extending walls are each substantially solid.

48. A data communications cable comprising:

a plurality of twisted pairs of insulated conductors including a first twisted pair, a second twisted pair, a third twisted pair and a fourth twisted pair;

wherein inherent crosstalk between the first twisted pair and the third twisted pair is greater than inherent crosstalk between the first twisted pair and the second twisted pair;

wherein the first twisted pair is maintained spaced apart from the second twisted pair along a length of the data communications cable by a first spacing;

wherein the third twisted pair is maintained spaced apart from the fourth twisted pair along the length of the data communications cable by a second spacing that is substantially similar to the first spacing;

wherein the first twisted pair is maintained spaced apart from the third twisted pair along the length of the data communications cable by a third spacing that is substantially larger than the first and second spacings; and

wherein the second twisted pair is maintained spaced apart from the fourth twisted pair along the length of the data communications cable by a fourth spacing that is substantially similar to the third spacing.