Separator tape for twisted pair in LAN cable

• US 7,999,184 B2
• Filed: 03/19/2009
• Issued: 08/16/2011
• Est. Priority Date: 03/19/2008
• Status: Active Grant

• Current Assignee: CommScope Inc. (CommScope Holding Company, Inc.)
• Original Assignee: CommScope Inc. (CommScope Holding Company, Inc.)
• Inventors: Hopkinson, Wayne C., Wiebelhaus, David A., Hayes, Trent M.
• Primary Examiner(s): Nguyen; Chau N
• Application Number:
  US12/407,407
• Publication Number:
  US 20090236120A1
• Time in Patent Office: 880 Days
• Field of Search: 174/113.R, 174/113.C, 174/131.A, 174/113.AS
• US Class Current: 174/113.00R
• CPC Class Codes: H01B 11/002 Pair constructions
• CPC Class Codes: H01B 11/06 with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

A cable includes a jacket surrounding first and second insulated conductors and a first dielectric tape, wherein the first insulated conductor is twisted with the second insulated conductor with the first dielectric tape residing therebetween to form a first twisted pair. The cable'"'"'s jacket may also surround a similarly formed second twisted pair. In alternative or supplemental embodiments of the invention, the first insulated conductor includes a first conductor surrounded by a layer of first dielectric insulating material having a radial thickness of about 7 mils or less; the first dielectric tape has a first width which is equal to or less than the diameters of the first and second insulated conductors plus a thickness of the first dielectric tape; the first dielectric tape has a cross sectional shape, which presents first and second recessed portions for seating the first and second insulated conductors; twist lengths of the first and second twisted pairs are between approximately 0.22 to 0.38 inches and different from each other; the first dielectric tape is different in shape, size or material content as compared to a second dielectric tape of the second twisted pair; the insulated conductors of the first and second twisted pairs are identical in appearance, while the first and second dielectric tapes are different in appearance; and/or the first dielectric tape has a hollow core possessing a gas or material with a lower dielectric constant.

Claims

1. A cable comprising:

a first insulated conductor, a first dielectric tape, and a second insulated conductor, wherein said first insulated conductor is twisted with said second insulated conductor with said first dielectric tape residing between said first insulated conductor and said second insulated conductor to form a first twisted pair; and

a jacket formed around said first twisted pair, wherein said first insulated conductor includes a first conductor of twenty three gauge, surrounded by a layer of first dielectric insulating material having a radial thickness of 7 mils or less.

2. The cable according to claim 1, wherein said radial thickness of said layer of first dielectric insulating material is about 5 mils or less and wherein said second insulated conductor includes a second conductor surrounded by a layer of second dielectric insulating material having a radial thickness of about 5 mils or less.

3. The cable according to claim 1, further comprising:

a third insulated conductor, a second dielectric tape, and a fourth insulated conductor, wherein said third insulated conductor is twisted with said fourth insulated conductor with said second dielectric tape residing between said third insulated conductor and said fourth insulated conductor to form a second twisted pair, wherein said first twisted pair is stranded with said second twisted pair to form a stranded core.

4. The cable according to claim 3, further comprising:

a separator within said jacket wherein said separator resides between said first twisted pair and said second twisted pair.

5. The cable according to claim 4, further comprising:

a third twisted pair and a fourth twisted pair within said jacket, wherein said separator resides between and separates said first twisted pair and said fourth twisted pairs from said second twisted pair and said third twisted pair.

6. The cable according to claim 1, wherein said first dielectric tape has a first width which extends approximately perpendicular to an extension length of said first twisted pair from a first edge of said first dielectric tape to a second edge of said first dielectric tape, and wherein said first width is greater than a diameter of said first insulated conductor plus a diameter of said second insulated conductor plus a thickness of said first dielectric tape.

7. The cable according to claim 6, further comprising:

a third insulated conductor, a second dielectric tape, and a fourth insulated conductor, wherein said third insulated conductor is twisted with said fourth insulated conductor with said second dielectric tape residing between said third insulated conductor and said fourth insulated conductor to form a second twisted pair, wherein said second dielectric tape has a second width which extends approximately perpendicular to an extension length of said second twisted pair from a first edge of said second dielectric tape to a second edge of said second dielectric tape, and wherein said second width is greater than a diameter of said third insulated conductor plus a diameter of said fourth insulated conductor plus a thickness of said second dielectric tape.

8. The cable according to claim 1, wherein said first dielectric tape has a first width which extends approximately perpendicular to an extension length of said first twisted pair from a first edge of said first dielectric tape to a second edge of said first dielectric tape, and wherein said first width is equal to or less than a diameter of said first insulated conductor plus a diameter of said second insulated conductor plus a thickness of said first dielectric tape.

9. A cable comprising:

a first insulated conductor, a first dielectric tape, and a second insulated conductor, wherein said first insulated conductor is twisted with said second insulated conductor with said first dielectric tape residing between said first insulated conductor and said second insulated conductor to form a first twisted pair; and

a jacket formed around said first twisted pair, wherein said first dielectric tape has a cross sectional shape in a direction perpendicular to an extension length of said first twisted pair, which presents a first recessed portion for seating said first insulated conductor and a second recessed portion for seating said second insulated conductor, wherein a first edge of said first dielectric tape circumscribes a helical path as said first insulated conductor is twisted with said second insulated conductor, and the helical path extends beyond said first and second insulated conductors, such that the first insulated conductor does not contact an inner wall of said jacket and is distanced from said inner wall of said jacket by a first minimum distance.

10. The cable according to claim 9, wherein said first dielectric tape has a first width which extends approximately perpendicular to an extension length of said first twisted pair from said first edge of said first dielectric tape to a second edge of said first dielectric tape, and wherein said first width is greater than a diameter of said first insulated conductor plus a diameter of said second insulated conductor plus a thickness of said first dielectric tape.

11. A cable comprising:

a first insulated conductor, a first dielectric tape, and a second insulated conductor, wherein said first insulated conductor is twisted with said second insulated conductor with said first dielectric tape residing between said first insulated conductor and said second insulated conductor to form a first twisted pair;

a third insulated conductor, a second dielectric tape, and a fourth insulated conductor, wherein said third insulated conductor is twisted with said fourth insulated conductor with said second dielectric tape residing between said third insulated conductor and said fourth insulated conductor to form a second twisted pair; and

a jacket formed around said first and second twisted pairs, wherein said first dielectric tape is different in shape, size or material content as compared to said second dielectric tape.

12. The cable according to claim 11, wherein said first dielectric tape has a first thickness which sets a spacing between said first insulated conductor and said second insulated conductor, wherein said second dielectric tape has a second thickness which sets a spacing between said third insulated conductor and said fourth insulated conductor, and wherein said second thickness is different from said first thickness.

13. The cable according to claim 12, wherein said second thickness differs from said first thickness by at least 1 mil.

14. The cable according to claim 12, wherein said first thickness is approximately 8 mils and said second thickness is approximately 10 mils.

15. The cable according to claim 11, wherein said first dielectric tape has a first width which extends approximately perpendicular to an extension length of said first twisted pair from a first edge of said first dielectric tape to a second edge of said first dielectric tape, wherein said second dielectric tape has a second width which extends approximately perpendicular to the extension length of said second twisted pair from a first edge of said second dielectric tape to a second edge of said second dielectric tape, and wherein said second width is different from said first width.

16. The cable according to claim 11, wherein said first dielectric tape is formed of a first material, wherein said second dielectric tape is formed of a second material;

and wherein said second material has a dielectric constant which is different from said first dielectric constant.

17. A cable comprising:

a first insulated conductor, a first dielectric tape, and a second insulated conductor, wherein said first insulated conductor is twisted with said second insulated conductor with said first dielectric tape residing between said first insulated conductor and said second insulated conductor to form a first twisted pair;

a third insulated conductor, a second dielectric tape, and a fourth insulated conductor, wherein said third insulated conductor is twisted with said fourth insulated conductor with said second dielectric tape residing between said third insulated conductor and said fourth insulated conductor to form a second twisted pair; and

a jacket formed around said first and second twisted pairs, wherein said first, second, third and fourth insulated conductors are identical in appearance, and said first dielectric tape is different in appearance from said second dielectric tape.

18. The cable according to claim 17, wherein said second dielectric tape has a different shape, color or indicia, as compared to said first dielectric tape.