Differential signal transmission cable

Patent metadata

Field	Value
Publication number	US-9384873-B2
Application number	US-201414459205-A
Country	US
Kind code	B2
Filing date	Aug 13, 2014
Priority date	Aug 22, 2013
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

In a differential signal transmission cable, a surface of a skin layer is partially provided with shield conductors disposed at respective equidistant portions spaced apart in a direction orthogonal to a direction in which two signal conductors are arranged, the equidistant portions each being distant by the same distance from axial centers of the signal conductors. On the surface of the skin layer, the shield conductors are not provided in areas located in the direction in which the signal conductors are arranged, and spaces are created in these areas.

First claim

What is claimed is:

1. A differential signal transmission cable comprising:
a pair of signal conductors;
an insulator disposed around each of the signal conductors; and
a shield conductor provided in part of a surface of the insulator and disposed at an equidistant portion located in a direction orthogonal to a direction in which the signal conductors are arranged, the equidistant portion being equidistant from axial centers of the signal conductors,
wherein the shield conductor includes a pair of shield conductors disposed opposite each other, with the insulator interposed therebetween, in the direction orthogonal to the direction in which the signal conductors are arranged, and
wherein each of the shield conductors is secured to the insulator.

2. The differential signal transmission cable according to claim 1 , wherein the shield conductor is secured to the insulator with an adhesive.

3. The differential signal transmission cable according to claim 1 , further comprising:
an adhesive sheet configured to secure the shield conductor to the insulator.

4. The differential signal transmission cable according to claim 1 , wherein the insulator has a transverse cross-section of an elliptical shape with a major axis and a minor axis, the major axis extending in the direction in which the signal conductors are arranged and the minor axis being orthogonal to the major axis.

5. The differential signal transmission cable according to claim 1 , wherein the insulator has a transverse cross-section of a track-like shape with a pair of linear portions and a pair of arc portions located between the linear portions, the linear portions extending in the direction in which the signal conductors are arranged.

6. The differential signal transmission cable according to claim 1 , wherein the pair of shield conductors has a width dimension greater than a distance between the axial centers of the signal conductors.

7. The differential signal transmission cable according to claim 6 , wherein the pair of shield conductors is devoid in the direction in which the signal conductors are arranged.

8. The differential signal transmission cable according to claim 1 , wherein the pair of shield conductors is devoid in the direction in which the signal conductors are arranged.

9. The differential signal transmission cable according to claim 1 , wherein the insulator covers the peripheries of the signal conductors together.

10. The differential signal transmission cable according to claim 1 , wherein each of the shield conductors is directly bonded to the insulator via an adhesive.

11. The differential signal transmission cable according to claim 1 , wherein each of the shield conductors is bonded to the insulator.

12. The differential signal transmission cable according to claim 1 , wherein a position corresponding to half of a width dimension of the shield conductor is located at the equidistant portion on the surface of the insulator.

13. The differential signal transmission cable according to claim 1 , wherein the shield conductors are not provided in areas on the surface of the insulator located in a direction of arrangement of the signal conductors.

14. The differential signal transmission cable according to claim 1 , wherein a same amount of an adhesive is applied to a same thickness to bonding surfaces of each of the shield conductors adjacent to the insulator so as to prevent electrical characteristics from being deteriorated by a difference in a thickness of the adhesive between each of the shield conductors.

15. The differential signal transmission cable according to claim 1 , wherein a center point of each of the shield conductors is equidistant to a center point of the signal conductors.

16. A differential signal transmission cable comprising:
a pair of signal conductors;
an insulator disposed around each of the signal conductors; and
a shield conductor provided in part of a surface of the insulator and disposed at an equidistant portion located in a direction orthogonal to a direction in which the signal conductors are arranged, the equidistant portion being equidistant from axial centers of the signal conductors,
wherein the shield conductor includes a pair of shield conductors disposed opposite each other, with the insulator interposed therebetween, in the direction orthogonal to the direction in which the signal conductors are arranged,
wherein each of the shield conductors is secured to the insulator, and
wherein the insulator includes a first insulator disposed around the signal conductors and containing air bubbles, and a second insulator disposed around the first insulator and containing no air bubbles.

17. The differential signal transmission cable according to claim 16 , wherein the pair of shield conductors has a width dimension greater than a distance between the axial centers of the signal conductors.

18. The differential signal transmission cable according to claim 17 , wherein the pair of shield conductors is devoid in the direction in which the signal conductors are arranged.

19. The differential signal transmission cable according to claim 16 , wherein the pair of shield conductors is devoid in the direction in which the signal conductors are arranged.

20. The differential signal transmission cable according to claim 16 , wherein the insulator covers the peripheries of the signal conductors together.

Assignees

• Hitachi Metals Ltd

Inventors

• Yonezawa Hidenori
• Sugiyama Takahiro
• Nonen Hideki
• Fukasaku Izumi

Classifications

• H01B11/002 Primary

  Pair constructions · CPC title