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CN-122025267-A - Cable unit, cable and communication system

CN122025267ACN 122025267 ACN122025267 ACN 122025267ACN-122025267-A

Abstract

The embodiment of the disclosure provides a cable unit, a cable and a communication system, and belongs to the technical field of signal transmission. The cable unit comprises at least one signal wire and at least one ground wire, wherein the signal wire is insulated from the ground wire, the signal wire comprises a metal wire and a conductive layer arranged on the surface of the metal wire, the conductivity of the conductive layer is larger than that of the metal wire, and the ratio of the conductivity of the conductive layer to that of copper is larger than 10. The disclosed embodiments enable low cost and low loss high speed signal transmission.

Inventors

  • ZHANG YING
  • CHENG PENGFEI
  • REN YUANLIN
  • WANG JIAN

Assignees

  • 北京有竹居网络技术有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (15)

  1. 1. A cable unit includes at least one signal line and at least one ground line; The signal wire is insulated from the ground wire; the signal wire comprises a metal wire and a conductive layer arranged on the surface of the metal wire, the conductivity of the conductive layer is larger than that of the metal wire, and the ratio of the conductivity of the conductive layer to that of copper is larger than 10.
  2. 2. The cable unit of claim 1, wherein the conductive layer is made of niobium arsenide nanoribbon.
  3. 3. The cable unit of claim 1, wherein the thickness of the conductive layer is greater than 1/3 of a target skin depth, the target skin depth being a skin depth corresponding to a highest rate of signals transmitted by the cable unit.
  4. 4. The cable unit of claim 1, wherein the metal wire comprises copper, aluminum, or silver.
  5. 5. The cable unit of claim 1, further comprising an insulating layer; The cable unit comprises two signal wires, the two signal wires are wrapped in the insulating layer, and the distance between the central lines of the two signal wires is in a value range of [0.4mm,0.5mm ].
  6. 6. The cable unit of claim 5, wherein the insulating layer is made of porous fluorinated ethylene propylene copolymer.
  7. 7. The cable unit of claim 6, wherein the inside of the closed hole of the insulating layer is filled with nitrogen.
  8. 8. The cable unit of claim 5, wherein the cable unit comprises two ground wires, the ground wires being strip-shaped metal sheets; the insulating layer is positioned between the two ground wires, the ground wires are parallel to the plane where the central lines of the two signal wires are positioned, and the projection of the two signal wires along the direction perpendicular to the ground wires is positioned on the ground wires.
  9. 9. The cable unit of claim 8, wherein a distance between a center line of the signal line and the ground line is greater than a distance between center lines of the two signal lines.
  10. 10. The cable unit of claim 8, further comprising two buffer layers; The insulating layer is located between the two buffer layers, and the buffer layers are clamped between the insulating layer and the ground wire.
  11. 11. The cable unit of claim 10, wherein the buffer layer is made of a spiral foam polyolefin.
  12. 12. The cable unit according to any one of claims 1-11, further comprising a protective sleeve; the protective sleeve is of a tubular structure, and the signal wire and the ground wire are wrapped in the protective sleeve.
  13. 13. A cable comprising an outer jacket and at least two cable units according to any one of claims 1-12; the outer sheath is of a tubular structure, and the cable unit is located in the outer sheath.
  14. 14. The cable according to claim 13, wherein a center of each of the cable units is arranged in a straight line or a center of each of the cable units is arranged in a ring shape in a cross section perpendicular to an axial direction of the cable.
  15. 15. A communication system comprising a first communication terminal, a second communication terminal and the cable of any one of claims 13-14; The first communication end is connected with the signal wire and the ground wire at the first end of the cable; the second communication end is connected with the signal wire and the ground wire at the second end of the cable; The cable is used for transmitting communication signals between the first communication end and the second communication end.

Description

Cable unit, cable and communication system Technical Field The embodiment of the disclosure relates to the technical field of signal transmission, in particular to a cable unit, a cable and a communication system. Background With the continuous improvement of the transmission rate of the high-speed interface of the chip, the requirements on the partial loss of pins (pin to pin) in the chip interconnection topology are more and more strict, and the larger loss can lead to the increase of the error rate of the transmission signal. As the loss in the signal transmission process is positively correlated with the transmission rate, the need for low-loss transmission schemes is increasing with the continuous increase of the transmission rate. At present, in order to reduce loss in the signal transmission process, an optical interconnection scheme is used for replacing an electrical interconnection scheme, namely information interaction is performed between communication devices through optical signals. However, although the optical interconnection scheme can reduce the loss in the signal transmission process, the cost is greatly increased compared with the electrical interconnection scheme, and how to realize a low-cost and low-loss transmission scheme is still a technical problem to be solved. Disclosure of Invention In view of the foregoing, embodiments of the present disclosure provide a cable unit, a cable and a communication system to solve or alleviate at least the above-mentioned problems. According to a first aspect of embodiments of the present disclosure, there is provided a cable unit including at least one signal line and at least one ground line, the signal line being insulated from the ground line, the signal line including a metal wire and a conductive layer disposed on a surface of the metal wire, the conductive layer having a conductivity greater than that of the metal wire, and a ratio of the conductivity of the conductive layer to that of copper being greater than 10. According to a second aspect of embodiments of the present disclosure, there is provided a cable, including an outer sheath and at least two cable units according to the first aspect, the outer sheath being of tubular structure, the cable units being located within the outer sheath. According to a third aspect of the embodiment of the present disclosure, there is provided a communication system, including a first communication end, a second communication end and the cable according to the second aspect, where the first communication end is connected to the signal line and the ground line at a first end of the cable, the second communication end is connected to the signal line and the ground line at a second end of the cable, and the cable is configured to transmit a communication signal between the first communication end and the second communication end. According to the scheme provided by the embodiment of the disclosure, the signal wire comprises the metal wire and the conductive layer arranged on the surface of the metal wire, when the signal wire transmits a high-speed signal, due to skin effect, current is mainly concentrated on the conductive layer, and the ratio of the conductivity of the conductive layer to the conductivity of copper is more than 10, namely the conductivity of the conductive layer is far more than the conductivity of copper, so that the loss in the high-speed signal transmission process can be reduced, and the conductivity of the metal wire is less than the conductivity of the conductive layer, so that the cost of the metal wire relative to the conductive layer is lower, and the cable unit has lower cost relative to the optical interconnection scheme, so that the low-cost and low-loss high-speed signal transmission can be realized. Drawings In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the embodiments of the present disclosure, and other drawings may be obtained according to these drawings to those of ordinary skill in the art. FIG. 1 is a schematic diagram of a cable unit of one embodiment of the present disclosure; FIG. 2 is a schematic diagram of a cable unit of another embodiment of the present disclosure; FIG. 3 is a schematic view of a cable unit of yet another embodiment of the present disclosure; FIG. 4 is a schematic diagram of a cable unit including a buffer layer according to one embodiment of the present disclosure; Fig. 5 is a schematic view of a cable unit including a protective sleeve according to one embodiment of the present disclosure; FIG. 6 is a schematic diagram of a cable of one embodiment of the present disclosure; FIG. 7 is a schematic diagram of a cable of another embodi