Telefonaktiebolaget Lm Ericsson (Publ)

Curt Erik Johansson

Hans M Nilsson

Bertil Olsson

Dietmar Gleich

Marcus Lindstrom

Tommy Cedervall

Hans Ullberg

The present invention concerns a cable for signal transmission and a method for producing such a cable. The cable comprises one or more wire pairs extending in a longitudinal direction, each of said wire pairs including two conductors each separately surrounded by a dielectric layer. At least one of said one or more wire pairs comprises a conductive shield being wrapped in a rotational direction along and about the longitudinal axis of the wire pair such that a longitudinal side of a wrap overlaps a preceding wrap. The conductive shield is applied with an angle (&#x3b8;) that differs between different wraps such that the conductive shield lay length (L) varies along the length of said cable.

Shielded pair cable and a method for producing such a cable

A method for producing an opto cable with a central strain relief core, a glue layer on the surface of the core, a first array of optofibre-containing tubular elements bonded to the core by the glue layer, and a porous filing material filling the space between the tubular elements and the glue on the surface of the strain relief core. At least a second array of optofibre-containing tubular elements is bonded to the first array by surrounding the first array of tubular elements and the filling material with a layer of glue which bonds the second array of tubular elements to the structure. Filling material is added between the tubular elements of the second array and the layer of glue. Additional concentric arrays of glue layers, tubular elements, and filling material can be added in the same manner. A casing surrounds the outermost concentric array of tubular elements.

Optofibre cable with concentric arrays of optical fiber tubes

Growing community of inventors

Hudiksvall, Sweden

Curt Erik Johansson