Photoelectrical composite data cable of star structure

Abstract

The invention discloses a photoelectrical composite data cable of a star structure. The photoelectrical composite data cable comprises an optical fiber unit, a first communication stranded wire pair, a second communication stranded wire pair, a first electric stranded wire pair, a second electric stranded wire pair and a pentagonal start framework. Four first copper conductors wrapped with insulating layers are stranded into the first communication stranded wire pair and a second communication stranded wire pair in a pairwise stranded mode for information communication. Four second copper conductors wrapped with insulating layers are stranded to form the first electric stranded wire pair and the second electric stranded wire pair in a pairwise stranded mode for electricity transmission. A metal layer is coated on the surface of the pentagonal start framework, and an aluminum layer of an aluminum foil layer is arranged on the inner side so that the aluminum layer can be in electric contact with the metal layer of the pentagonal start framework. A steel wire is tightly wrapped on the outer surface of the aluminum foil layer to form an armor layer, and a plurality of air holes are formed in the pentagonal start framework. The dielectric constant of the pentagonal start framework is larger than 0.1 and smaller than 2.3. By means of the photoelectrical composite data cable, communication cable allowance of crosstalk indicators is effectively improved by 1%, and even allowance of loss is improved by 1dB. Stability of characteristic impedance is increased by 1.5%, and meanwhile external electromagnetic interference is effectively prevented from entering the cable and internal signals are prevented from radiating out.

Description

technical field [0001] The invention relates to a data cable, in particular to a star structure photoelectric composite data cable. Background technique [0002] The structure of ordinary single-type communication cables: the main structure of the cable is that the copper conductor is extruded with a layer of insulation, the single wire is twisted and then cabled, and the outer structure is made of polyolefin outer sheath. In the decoration distribution system and automatic detection system, it causes large stretch, unstable quality, cumbersome wiring, unreliability and affects the performance. Contents of the invention [0003] The invention provides a photoelectric composite data cable with a star structure, which can effectively increase the 1% margin of the crosstalk index of the communication cable, and even increase the 1dB margin of the loss, and increase the characteristic impedance by 1.5%. Stability; at the same time, it also effectively prevents external electr...

AI Technical Summary

Problems solved by technology

[0002] The structure of ordinary single-type communication cables: the main structure of the cable is that the copper conductor is extruded with a layer of insulation, the single wire is twisted and then cabled, and the outer structure is made of polyolefin outer sheath. In the decoration distribution system and automatic detection system, it causes large stretch, unstable quality, cumbersome wiring, unreliability and affects performance

Images