High speed data cable

Abstract

The invention belongs to the technical field of wire cables, and particularly relates to a high speed data cable. The high speed data cable comprises four groups of insulated wire pairs, and a sheath layer coating all the insulated wire pairs. The high speed data cable is characterized in that each group of insulated wire pairs comprises two mutually twisted insulated wire cores and a coating layer coating the two insulated wire cores and allowing positions of the two insulated wire cores to be fixed; each insulated wire core consists of a conductor in an inner layer, a shielding tape coated outside the conductor, and an insulating layer coated outside the shielding tape; the shielding tapes consist of bonding inner layers, shielding layers and bonding outer layers which are bonded together sequentially; the thicknesses of the bonding inner layers are greater than those of the bonding outer layers; the bonding inner layers are in contact with the conductors; the bonding inner layers and the bonding outer layers are made of the same material; and the insulating layers and the bonding outer layers are made of the same material. The high speed data cable has the main beneficial effects that the high speed data cable is simple in structure, convenient to manufacture, high in finished product yield, stable in cable structure and low in crosstalk, and is suitable for high-frequency and high-speed transmission.

Description

technical field [0001] The invention belongs to the technical field of cables, in particular to a cable for high-speed transmission of high-frequency data. Background technique [0002] The wire and cable industry is the second largest industry in China after the automobile industry, and the product variety satisfaction rate and domestic market share both exceed 90%. Worldwide, China has become the world's largest producer and consumer of wire and cable. [0003] With the rapid development of digital technology, computers are not only widely used in various industrial facilities, but also widely popularized in various offices and even residential buildings. The continuous expansion and extension of computer networks, as well as the sharp increase in the amount of transmitted information, on the one hand, have increased the amount of data cables used for network deployment by a large margin; on the other hand, data cables have been required to have higher transmission speed...

AI Technical Summary

Problems solved by technology

In addition, due to the size gap between the outer diameter of the cross frame and the inner diameter of the cable jacket, the positioning performance of the cross frame is insufficient, and it is easy to cause radial displacement and movement of the frame in the outer sheath, resulting in the size of the space occupied by each pair of wire groups. One or random variation, causing additional extrusion and drafting of the wire group

These factors that cause small changes in geometric position or shape will cause a sharp decline in the performance of high-speed data cables

Also, because the cross frame adopts a solid structure, this solid frame has a high dielectric constant, which is not conducive to the reduction of the capacitance value between the paired wire groups, and also restricts the further improvement of the electrical properties such as the impedance and attenuation of the paired wire group

[0006] Chinese patent (application number 200420054577.2) discloses a high-speed data cable, which uses a rib to separate the upper and lower pairs of wire groups, but there is also a problem that the cables are adjacent to each other after bending. The intrusion problem of the line pair, and the position between the upper two pairs and the lower two pairs is actually very easy to cause position movement, so it greatly affects the transmission of high-speed signals

The inner layer of the aluminum-plastic composite layer is polyester film, the outer layer is aluminum thin film, the second insulating layer is coated on the outer aluminum thin film, and the second insulating layer and aluminum thin film are bonded by hot melt adhesive. method, the production speed is slow, and the shape and size are not easy to control

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