Prestolite Wire Corporation

Krone Digital Communications

Rune Totland

Timothy N Berelsman

Jim L Dickman

Mark E Grandy

Mark W White

James J Pelster

Janet M Rosenbaum

Joseph W Grabowski

David J Wiekhorst

Edwin D Laing

A cable includes an even number of pairs of conductors divided into an even number of groups and a single pair of conductors that encircle a length of filler material. The even number of groups conductors surround the single pair of conductors and the filler material. In one embodiment, the filler material is twined to cause an air gap to surround any portion of the groups that are not in contact with the filler material. In another embodiment, a longitudinal groove is formed on the outer surface of the filler material and the single pair of conductors rides on the groove. An outer shield surrounds all the pairs of conductors and the filler material. A method of forming the cable is disclosed.

Cable with twisting filler

A low loss data cable includes a plurality of conductor pairs combined to form a core, each conductor pair including coupled braided conductors where each conductor encircles its coupled conductor with each conductor encircling being defined as a pair lay length. A first insulating material layer separately insulates each of the conductors. A second insulating material layer, surrounds a core that includes the plurality of conductor pairs in a twist formation where each of the plurality of conductor pairs encircles a center gap separating all of the conductor pairs. When each conductor pair encircling is defined as a core lay length, the pair lay length of each of the conductor pairs is no greater than about one third of the core lay length.

Low loss data cable

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.

High performance data cable

Growing community of inventors

Bergen, Norway

Rune Totland