Communications cable with improved electro-magnetic performance

Patent metadata

Field	Value
Publication number	US-10388435-B2
Application number	US-201816013012-A
Country	US
Kind code	B2
Filing date	Jun 20, 2018
Priority date	Jun 26, 2017
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

A communications cable has a cable core with a plurality of twisted pairs of conductors and a metal foil tape disposed between the cable core and a jacket of the communications cable. The metal foil tape has a plurality of cuts that create a plurality of discontinuous regions in a metal layer of the metal foil tape. The metal foil tape is wrapped around the cable core such that the discontinuous regions overlap to form a plurality of overlapping regions. The overlapping regions producing capacitances connected in series, reducing an overall capacitance between the overlapping discontinuous regions. The plurality of cuts form a Y-shape cut having a first straight cut starting at one side of the metal foil tape and two cuts branching off of the first straight cut at opposite angles near a second side of the metal foil tape.

First claim

The invention claimed is:

1. A communications cable, comprising:
a cable core comprising a plurality of twisted pairs of conductors; and
a metal foil tape disposed between the cable core and a jacket of the communications cable, the metal foil tape comprising a plurality of cuts that create a plurality of discontinuous regions in a metal layer of the metal foil tape;
wherein the metal foil tape is wrapped around the cable core such that the discontinuous regions overlap to form a plurality of overlapping regions, the overlapping regions producing capacitances connected in series, thereby reducing an overall capacitance between the overlapping discontinuous regions and further wherein the plurality of cuts form a Y-shape cut having a first straight cut starting at one side of the metal foil tape and two cuts branching off of the first straight cut at opposite angles near a second side of the metal foil tape.

2. The communications cable of claim 1 , wherein the overall capacitance between the overlapping discontinuous regions is reduced by a factor of two.

3. The communications cable of claim 1 , wherein the plurality of overlapping regions are triangular overlapping regions.

4. The communications cable of claim 1 , wherein the two cuts branching off of the first straight cut have respective angles of 4-degrees and −4-degrees.

Assignees

• Panduit Corp

Inventors

• Wachtel Paul W
• Bolouri-Saransar Masud
• Nordin Ronald A
• Jenner Royal O
• Frigo Gary E

Classifications

• H01B11/1016

  composed of a longitudinal lapped tape-conductor · CPC title

• H01B11/1008 Primary

  Features relating to screening tape per se · CPC title

• H01B13/0036

  Details · CPC title

• H01B11/08 Primary

  Screens specially adapted for reducing cross-talk · CPC title

• H01B13/26

  by winding, braiding or longitudinal lapping · CPC title