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Differential signal cable

A differential signal and cable technology, which is applied in the field of high-speed data transmission, can solve the problems that the relative dielectric constant cannot be effectively reduced, the effective relative dielectric constant cannot be reduced, and the cable volume can be reduced, so as to reduce the effective relative dielectric constant. Electric constant, relative permittivity is small, and the effect of reducing the size of the cable

Pending Publication Date: 2018-05-29
郑成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since there is no coupling between the two coaxes of a differential signal cable, the assembly and processing of this type of coaxial structure cable requires precise cutting length, especially when the skew between signal pairs is required to be within 10ps At the same time, even if the inhomogeneity of the medium between the coaxial cables (dielectric constant, cable diameter, conductor roughness, etc.) Processing of the above components is quite challenging
[0006] Patent No. CN201320570309 granted to Hitachi Metals Co., Ltd. discloses a cable in which tiny grooves are formed on the outer periphery of the skin layer or the inner periphery of the shielded conductor to form a gap, and then the electromagnetic field of the differential signal is mainly distributed between and around the two conductors. This method still cannot reduce the effective relative permittivity and thus reduce the cable volume
[0007] Patent No. CN201210137921 granted to Hitachi Electric Wire Co., Ltd. discloses a method of insulating dielectric construction, which can solve the problem of metal foil relaxation, but because the insulating medium is a solid insulating medium, it cannot effectively reduce the relative permittivity

Method used

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Experimental program
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Embodiment 1

[0064] image 3 It shows the cross-sectional structure diagram of Embodiment 1 of the differential signal cable of the present invention (the view perpendicular to the length direction of the conductor). Depend on image 3 It can be seen that the differential signal cable 1 of the present invention includes an insulated core wire 2 and a shielding layer 3 . The insulated core wire 2 is composed of double conductors 211 , 212 , an insulating medium 22 covering the double conductors 211 , 212 , and a gas gap 241 embedded in the middle of the insulating medium 22 . The gas gap 241 in the middle part is parallel to the double conductors 211, 212, and the center of gravity of the gas gap 241 in the middle part is at the midpoint of the line connecting the centers of the double conductors 211, 212 (the gas gap 241 in the middle part is at the center of the double conductors 211, 212 The line formed by the midpoint of the center line is the central axis, and the radius of 1.5*R is ...

Embodiment 2

[0072] Figure 4 It shows the cross-sectional structural schematic view of Embodiment 2 of the differential signal cable of the present invention (the view perpendicular to the length direction of the conductor). Depend on Figure 4 It can be seen that the differential signal cable 1A of the present invention includes an insulated core wire 2 , a shielding layer 3 and a drain wire 4 . The insulated core wire 2 is composed of double conductors 211 , 212 , an insulating medium 22 covering the double conductors 211 , 212 , and a gas gap 241 embedded in the middle of the insulating medium 22 . The gas gap 241 in the middle part is parallel to the double conductors 211, 212, and the center of gravity of the gas gap 241 in the middle part is at the midpoint of the line connecting the centers of the double conductors 211, 212 (the gas gap 241 in the middle part is at the center of the double conductors 211, 212 The line formed by the midpoint of the center line is the central axis,...

Embodiment 3

[0078] Figure 5 It shows the cross-sectional structure diagram of Embodiment 3 of the differential signal cable of the present invention (the view perpendicular to the length direction of the conductor). Depend on Figure 5 It can be seen that the differential signal cable 1B of the present invention includes an insulating core wire 2 , a shielding layer 3 , drain wires 41 and 42 , and a first stabilizing layer 5 . The insulated core wire 2 is composed of double conductors 211, 212, an insulating medium 22 covering the double conductors 211, 212, an intermediate gas gap 241 embedded in the middle of the insulating medium 22, and a central connection line along the double conductors 211, 212. The mid-vertical plane symmetric gas voids 242 and 243 are embedded symmetrically in the mid-vertical plane. The center of gravity of the gas gap 241 in the middle is at the midpoint of the line connecting the centers of the double conductors 211 and 212 , and the vertically symmetrical...

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Abstract

The invention discloses a differential signal cable, which comprises an insulating core wire and a shielding layer, wherein the insulating core wire is formed by a pair of double conductors arranged in parallel, an insulating medium covering the double conductors and a middle gas gap embedded into the middle of the insulating medium; and the middle gas gap is parallel to the double conductors. Thedifferential signal cable has the characteristics of being small in external diameter, light in weight, small in bending radius, softer and low in loss.

Description

technical field [0001] The invention relates to high-speed data transmission, in particular to a differential signal cable. Background technique [0002] With the development of IoT, LTE / LTE-A / 5G communication technology, and the growth of personal computers, cloud storage, cloud computing, servers, and supercomputers, differential signal cables that can transmit data faster than ever before are required. Optical fiber provides the best data rate and performance for long distance and high data rate transmission because optical fiber provides transmission with low attenuation and low bit error rate. However, due to expensive transceivers and power consumption of optical modules, passive copper cables capable of high-speed data transmission are still required for short distances. [0003] In products such as servers, routers, and storage devices that process high-speed digital signals of several Gbps or more, signal transmission between devices or between substrates in device...

Claims

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Application Information

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IPC IPC(8): H01B7/08H01B7/18H01B7/02H01B7/22
CPCH01B7/0258H01B7/0807H01B7/0861H01B7/185H01B7/225
Inventor 郑成
Owner 郑成
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