Communication cable whose insulated conductors are parallelly-opposite-arraged into bundle

A technology for communication cables and insulated conductors, applied in communication cables, plastic/resin/wax insulators, cables with twisted strands/quad strands, etc., can solve the problem of reducing attenuation characteristics, signal transmission effects, synthetic foam The medium is easy to be crushed, etc.

Inactive Publication Date: 2003-09-24
COMMSCOPE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem with such telecommunication cables made from conventional twisted pair assemblies is that crosstalk will occur between the twisted pairs of insulated conductors which will negatively affect the transmission of signals between those conductors
However, synthetic foam media is prone to crushing during mating and bundling
This crushing will increase the capacitance of the completed cable, lower the impedance of the cable, and thus reduce the attenuation characteristics, which is not desired

Method used

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  • Communication cable whose insulated conductors are parallelly-opposite-arraged into bundle
  • Communication cable whose insulated conductors are parallelly-opposite-arraged into bundle
  • Communication cable whose insulated conductors are parallelly-opposite-arraged into bundle

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] The performance of cables with oppositely twisted pairs and bundles compared to cables with oppositely twisted pairs and bundles was tested.

[0033] Both cables were tested, each with four twisted pairs of insulated conductors, and the specifications are given in Table 1.

[0034] feature

value

Conductor size

24 gauge

conductor material

American Wire Gauge Copper Wire

insulator material

3 pairs foam / skin PVC; 1 pair foam / skin PE

Insulator Thickness

0.007 inches

insulator coaxial capacitor

Fluorinated ethylene propylene min 52, max 57, polyethylene 61 (picofarads / ft)

cable length

328 feet

envelope material

PVC compound (rated for high pressure)

[0035] The twisted pairs of each cable are twisted in a counterclockwise direction with a twist length of 0.45 to 0.8 inches. One cable (cable 1) is bundled clockwise (i.e. twisted and bundled in opposite directions) with a 6" lay ...

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Abstract

A communication cable comprising: an elongated cable jacket having a lumen, a plurality of twisted pairs of insulated conductors disposed within the lumen of the cable jacket, each conductor insulated by a polymer layer. Each insulated conductor within each twisted pair of conductors has a laying helix in a first direction of rotation, and each twisted pair has a binding helix in a second direction of rotation, the second direction of rotation being opposite to the first direction of rotation. With this structure, communication cables can provide better crosstalk and attenuation performance. When twisted pairs and bundles are in the same direction of rotation, good performance cannot be achieved even with foam insulators.

Description

technical field [0001] The present invention relates to telecommunication cables, particularly telecommunication cables comprising at least one twisted pair of insulated conductors. Background technique [0002] Insulated conductors used in communication cables are typically twisted pairs of insulated conductors in which two insulated conductors are twisted or twisted together to form a pair of conductor families. A typical assembly of such communication cables includes twisted or multi-pairs of insulated conductors bundled together (eg further twisted and in some cases comprising a bundle of wires or cables) and housed within a cable jacket. This twisting and bundling of conductors facilitates cable installation and connection between insulated conductors. Twisted pair conductors are commonly used in network structures such as local area network (LAN) cables or wireless cables. [0003] A problem with such communication cables made from conventional twisted pair assemblie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B11/04H01B11/00H01B11/06H01B13/00
CPCH01B11/005
Inventor M·帕特尔
Owner COMMSCOPE INC
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