High frequency signal transmission cable

Patent metadata

Field	Value
Publication number	US-2021005351-A1
Application number	US-201916596529-A
Country	US
Kind code	A1
Filing date	Oct 8, 2019
Priority date	Jul 1, 2019
Publication date	Jan 7, 2021
Grant date	—

Abstract

A high frequency signal transmission cable includes a conductor, an insulator provided over a periphery of the conductor, a plating layer provided over a periphery of the insulator, and a sheath provided over a periphery of the plating layer. A crack suppressing layer is provided between the insulator and the plating layer, in such a manner as to remain in contact with the insulator while being provided with the plating layer over an outer surface of the crack suppressing layer. The crack suppressing layer suppresses the occurrence of a cracking in the plating layer by bending while moving in a longitudinal direction of the cable relative to a bending of the insulator.

First claim

1 . (canceled)

2 . The high frequency signal transmission cable according to claim 18 , wherein a thickness of the crack suppressing layer is less than a thickness of the insulator.

3 . The high frequency signal transmission cable according to claim 18 , wherein the crack suppressing layer has a thickness of 0.10 mm or more and 0.20 mm or less.

4 . The high frequency signal transmission cable according to claim 18 , wherein the plating layer comprises a metal having an electrical conductivity of 99% or more.

5 . The high frequency signal transmission cable according to claim 18 , wherein the plating layer has a thickness of 2 μm or more and 5 μm or less.

6 . The high frequency signal transmission cable according to claim 18 , wherein the conductor comprises a compressed stranded wire conductor comprising a plurality of wires stranded together and compressed to have a predetermined cross-sectional shape perpendicular to the longitudinal direction of the cable.

7 . The high frequency signal transmission cable according to claim 18 , wherein a melting point of a resin to be used in the crack suppressing layer is lower than a melting point of a resin to be used in the insulator.

8 . The high frequency signal transmission cable according to claim 18 , wherein the insulator comprises an irradiated cross-linked polyethylene, and the crack suppressing layer comprises a non-cress-linked polyethylene.

9 . The high frequency signal transmission cable according to claim 18 , further comprising:
a metal shield layer provided over a periphery of the plating layer.

10 - 11 . (canceled)

12 . A high frequency signal transmission cable, comprising:
a conductor; an insulator provided over a periphery of the conductor; a plating layer provided over a periphery of the insulator; a sheath provided over a periphery of the plating layer,
wherein a crack suppressing layer is provided between the insulator and the plating layer, in such a manner as to remain in contact with the insulator while being provided with the plating layer over an outer surface of the crack suppressing layer,
wherein an attenuation in a band of not lower than 1.25 GHz and not higher than 6 GHz is not lower than 0.26 dB/m and not higher than 0.80 dB/m,
wherein the crack suppressing layer is unadhered to the insulator,
wherein the plating layer is adhered to the crack suppressing layer, and
wherein the crack suppressing layer suppresses an occurrence of a cracking in the plating layer by bending together with the plating layer while being integral and moving with the plating layer in a longitudinal direction of the cable relative to a bending of the insulator;
a first braided shield disposed on an outer surface of the plating layer; and a second braided shield disposed on an outer surface of the first braided shield and on an inner surface of the sheath. wherein the second braided shield comprises metal wires having a larger outer diameter than metal wires of the first braided shield.

13 . The high frequency signal transmission cable according to claim 12 , wherein the outer surface of the crack suppressing layer is roughened, the roughened outer surface of the crack suppressing layer is subjected to a corona discharge exposure treatment, and an electroless plating is applied to form the plating layer on an entire periphery of the crack suppressing layer.

14 . The high frequency signal transmission cable according to claim 12 , wherein the crack suppressing layer is configured to freely move relative to the insulator.

15 . The high frequency signal transmission cable according to claim 12 , wherein the crack suppressing layer and the plating layer are configured to freely move relative to the insulator.

16 . The high frequency signal transmission cable according to claim 18 , wherein the crack suppressing layer and the plating layer are configured to freely move relative to the insulator.

17 . (canceled)

18 . A high frequency signal transmission cable, comprising:
a conductor; an insulator provided over a periphery of the conductor; a plating layer provided over a periphery of the insulator; a sheath provided over a periphery of the plating layer,
wherein a crack suppressing layer is provided between the insulator and the plating layer, in such a manner as to remain in contact with the insulator while being provided with the plating layer over an outer surface of the crack suppressing layer,
wherein the crack suppressing layer is unadhered to the insulator,
wherein the plating layer is adhered to the crack suppressing layer, and
wherein the crack suppressing layer suppresses an occurrence of a cracking in the plating layer by bending together with the plating layer while being integral and moving with the plating layer in a longitudinal direction of the cable relative to a bending of the insulator;
a first braided shield disposed on an outer surface of the plating layer; and a second braided shield disposed on an outer surface of the first braided shield and on an inner surface of the sheath, wherein the second braided shield comprises metal wires having a larger outer diameter than metal wires of the first braided shield.

19 . The high frequency signal transmission cable according to claim 18 , wherein the outer surface of the crack suppressing layer is roughened, the roughened outer surface of the crack suppressing layer is subjected to a corona discharge exposure treatment, and an electroless plating is applied to form the plating layer on an entire periphery of the crack suppressing layer.

20 . The high frequency signal transmission cable according to claim 18 , wherein the crack suppressing layer is configured to freely move relative to the insulator, and
wherein the crack suppressing layer is configured to remain in contact with the insulator with no space therebetween.

Assignees

• Hitachi Metals Ltd

Inventors

• Huang Detian
• Tsukamoto Yoshinori
• Moriyama Masashi
• Sagawa Hideyuki
• Sugiyama Takahiro

Classifications

• H01B11/1895

  Particular features or applications · CPC title

• H01B1/026 Primary

  Alloys based on copper · CPC title

• H01B7/24

  Devices affording localised protection against mechanical force or pressure · CPC title

• H01B13/22

  Sheathing; Armouring; Screening; Applying other protective layers (H01B13/32 takes precedence) · CPC title

• H01B7/303

  Conductors comprising interwire insulation · CPC title