High performance data cable
First Claim
1. A communication cable comprising:
- a plurality of twisted pair conductors, each of said twisted pair conductors including a pair of individually insulated metal conductors that are twisted together to form one of said plurality of twisted pair conductors;
a separator having a plurality of outwardly protruding projections angularly spaced about a core, said plurality of outwardly protruding projections having substantially parallel sides and protruding radially from said core and defining regions between adjacent ones of said outwardly protruding projections within each of which one of said plurality of twisted pair conductors is contained, said regions and said projections sized to maximize air about each one of said twisted pair conductors; and
a communication cable jacket enclosing said plurality of twisted pair conductors separated by said plurality of outwardly protruding projections of said separator;
wherein;
said communication cable has a high test frequency of 400 MHz and for lengths of 90 meters is characterized by an ACR (attenuation to crosstalk ratio) of at least 10 dB at a frequency of 200 MHz and an ACR of at least 0 dB at a frequency of 300 MHz measured using worst-pair NEXT testing, and said communication cable for lengths of 100 meters is characterized by an ACR of at least 10 dB at a frequency of 160 MHz and an ACR of at least 0 dB at a frequency of 250 MHz measured using powersum NEXT testing.
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Accused Products
Abstract
High performance data cables are provided that allows for future growth in networking speeds. The high performance data cables achieve this result while satisfying the dimensional requirements set by the EIA/TIA 568-A standards as well as fire performance safety requirements of the National Fire Protection Association (NFPA). High performance data cables of this invention achieve the above by controlling parameters that influence impedance performance, near-end crosstalk performance and attenuation. A separating filler material is used to maximize the pair-to-pair distance while maintaining an overall maximum outside diameter of 0.250". This construction benefits crosstalk performance, as both electrical and magnetic field intensities are inversely related to distance and dielectric constant (crosstalk is made up of capacitative and inductive coupling, with inductive coupling becoming significant at frequencies above 50 MHz). Balancing between parameters that influence impedance, near-end crosstalk and attenuation performance by choice of materials and physical dimensions of the filler material, insulation material, jacket material and conductor, the overall performance of the data cable of this invention is achieved. A standard for the high performance data cables of this invention is also disclosed.
392 Citations
26 Claims
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1. A communication cable comprising:
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a plurality of twisted pair conductors, each of said twisted pair conductors including a pair of individually insulated metal conductors that are twisted together to form one of said plurality of twisted pair conductors; a separator having a plurality of outwardly protruding projections angularly spaced about a core, said plurality of outwardly protruding projections having substantially parallel sides and protruding radially from said core and defining regions between adjacent ones of said outwardly protruding projections within each of which one of said plurality of twisted pair conductors is contained, said regions and said projections sized to maximize air about each one of said twisted pair conductors; and a communication cable jacket enclosing said plurality of twisted pair conductors separated by said plurality of outwardly protruding projections of said separator;
wherein;said communication cable has a high test frequency of 400 MHz and for lengths of 90 meters is characterized by an ACR (attenuation to crosstalk ratio) of at least 10 dB at a frequency of 200 MHz and an ACR of at least 0 dB at a frequency of 300 MHz measured using worst-pair NEXT testing, and said communication cable for lengths of 100 meters is characterized by an ACR of at least 10 dB at a frequency of 160 MHz and an ACR of at least 0 dB at a frequency of 250 MHz measured using powersum NEXT testing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. In a high performance data cable having a diameter less than 0.250 inches and including a plurality of insulated conductor pairs, an interior support for separating the conductor pairs and for controlling parameters that influence impedance performance, near-end crosstalk performance and attenuation, comprising:
a plurality of radially outwardly protruding projections angularly spaced about a core, said plurality having substantially parallel sides and defining regions between adjacent projections within each of which one of the plurality of insulated conductor pairs is contained, said regions and said projections sized to maximize air about each one of the insulated conductor pairs.
Specification
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- Resources
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Current AssigneeCommScope Technologies, LLC (CommScope Holding Company, Inc.)
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Original AssigneePrestolite Wire LLC (General Cable Corporation)
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InventorsWiekhorst, David J., Totland, Rune, White, Mark W., Pelster, James J., Laing, Edwin D., Berelsman, Timothy N., Dickman, Jim L. II, Grandy, Mark E., Rosenbaum, Janet M.
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Primary Examiner(s)Kincaid, Kristine
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Assistant Examiner(s)Nguyen, Chau N.
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Application NumberUS09/062,059Time in Patent Office949 DaysField of Search174/113 C, 174/113 R, 174/131 A, 174/121 A, 385/105, 385/110, 385/112US Class Current174/113.00CCPC Class CodesH01B 11/02 Cables with twisted pairs o...
