High-speed high-performance communication cable and its manufacturing process

Abstract

A high speed data communication cable used on network is prepared as forming cable by four pairs of cable lines as each cable line pair being prepared by twisting two pieces of cable lines and being covered with insulation protective sheath then twisting four pairs together in certain sequence, forming each signal line by conductor cable core and insulation cover using copper covered steel as conductor cable core, applying CMP Teflon as material to prepare insulation protective sheath and insulation cover.

Description

technical field [0001] The invention relates to a signal transmission cable, in particular to a high-speed and high-performance data communication cable for a network with bidirectional simultaneous input and output of digital signals and a manufacturing process thereof. Background technique [0002] In the utility model whose announcement number is CN2266183, the announcement date is October 29, 1997, and the name is a high-speed high-performance data communication cable for computer network, it is disclosed that it is composed of eight cables with the same structure, and every two cables are twisted together. Become a pair, and set an outer sheath on the outside of the four pairs. Each cable is composed of a conductor, a first insulating layer, a second insulating layer, and a color ring. The transmission performance of the utility model is greatly improved, the transmission rate reaches 100 Mbps, and the distributed capacitance is small, the attenuation is reduced, and th...

AI Technical Summary

Problems solved by technology

During manufacturing, it is difficult to ensure the concentricity between the conductor and the first and second insulating layers; and the eccentricity caused by insufficient concentricity makes the impedance of the cable fluctuate greatly

The mismatch of impedance causes a part of the signal to be reflected to the transmission source at a specific frequency, so that the signal is lost, and return loss occurs.

The concentricity of the cable and the cylindricity of the cable core are poor, which causes the signal to radiate outward on the one hand, and on the other hand, there is no way to offset all external interference, so far-end crosstalk occurs

[0005] In addition, in the above-mentioned technical solution, there is no twisted wire pitch for every two twisted wires to form a pair of twisted wires, that is, the distance between adjacent twisted crests of the same cable in a single pair of twisted wires (referred to as "twisted wire"). distance") description

Since the intersecting points of the lay lengths of each pair of twisted wires are not staggered, each pair of twisted wires interferes with each other; it is easy to generate near-end crosstalk

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