Coaxial cable

• US 20090255706A1
• Filed: 01/22/2009
• Published: 10/15/2009
• Est. Priority Date: 04/09/2008
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd., Tsinghua University
• Original Assignee: Hon Hai Precision Industry Co., Ltd., Tsinghua University
• Inventors: Fan, Shou-Shan, Jiang, Kai-Li, Liu, Liang
• Granted Patent: US 8,604,340 B2
• Time in Patent Office: Days
• US Class Current: 174/102.R
• CPC Class Codes: H01B 1/24 the conductive material comprising carbon-silicon compounds, carbon or silicon
• CPC Class Codes: H01B 11/1808 Construction of the conductors
• CPC Class Codes: H01B 7/30 with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect

Abstract

A coaxial cable includes a core, an insulating layer, a shielding layer, and a sheathing layer. The core includes a carbon nanotube wire-like structure and at least one conductive material layer is disposed on the outside surface of the carbon nanotube wire-like structure. The carbon nanotube wire-like structure includes a plurality carbon nanotubes orderly arranged.

Claims

1. A coaxial cable comprising:

a core comprising a carbon nanotube wire-like structure and at least one conductive coating wrapping the carbon nanotube wire-like structure, wherein the carbon nanotube wire-like structure comprising a plurality carbon nanotubes orderly arranged;

an insulating layer wrapping the core;

a shielding layer wrapping the insulating layer; and

a sheathing layer wrapping the shielding layer.

2. The coaxial cable as claimed in claim 1, wherein the carbon nanotube wire-like structure comprises at least one carbon nanotube wire, the at least one carbon nanotube wire comprises a plurality of carbon nanotubes orderly arranged.

3. The coaxial cable as claimed in claim 2, wherein the carbon nanotube wire comprises of an untwisted carbon nanotube wire having a plurality of carbon nanotubes, the carbon nanotubes in the untwisted carbon nanotube wire are aligned along the axial direction of the untwisted carbon nanotube wire.

4. The coaxial cable as claimed in claim 2, wherein carbon nanotube wire comprises of a twisted carbon nanotube wire having a plurality of carbon nanotubes, the carbon nanotubes in the twisted carbon nanotube wire are aligned helically around the axial direction of the twisted carbon nanotube wire.

5. The coaxial cable as claimed in claim 2, wherein the carbon nanotubes in the carbon nanotube wire have an approximately same length and are joined end-to-end by van der Waals attractive force therebetween.

6. The coaxial cable as claimed in claim 2, wherein a diameter of the carbon nanotube wire is from about 4.5 nanometers to about 100 microns.

7. The coaxial cable as claimed in claim 2, wherein the carbon nanotube wire-like structure comprises a plurality of the carbon nanotube wires braided together.

8. The coaxial cable as claimed in claim 1, wherein the conductive coating comprises a conductive layer.

9. The coaxial cable as claimed in claim 8, wherein the material of the conductive layer comprises of a material selected from the group consisting of copper, silver, gold and alloys thereof.

10. The coaxial cable as claimed in claim 8, wherein the conductive coating further comprises a wetting layer between the outside surface of the carbon nanotube wire-like structure and the conductive layer, the wetting layer comprises of a material that is selected from the group consisting of nickel, palladium, titanium, and alloys thereof.

11. The coaxial cable as claimed in claim 10, wherein the conductive coating further comprises a transition layer between the wetting layer and the conductive layer, the transition layer comprises of a material selected from the group consisting of copper, silver and alloys thereof.

12. The coaxial cable as claimed in claim 8, wherein the conductive coating further comprises an anti-oxidation layer wrapping the conductive layer, the anti-oxidation layer comprises of a material selected from the group consisting gold, platinum and alloys thereof.

13. The coaxial cable as claimed in claim 1, wherein the core further comprises a strengthening layer wrapping the conductive coating, the strengthening layer comprises of a material selected from the group consisting of polyvinyl acetate, polyvinyl chloride, polyethylene, paraphenylene benzobisoxazole, and combinations thereof.

14. The coaxial cable as claimed in claim 1, wherein material of the shielding layer is selected from the group consisting of metals, carbon nanotubes, composite having carbon nanotubes, composite having metals, and combinations thereof.

15. The coaxial cable as claimed in claim 14, wherein the shielding layer comprises at least one wire, at least one film or combinations thereof.

16. The coaxial cable as claimed in claim 15, wherein the shielding layer comprises at least one metal wire, at least one metal film, at least one carbon nanotube wire, at least one carbon nanotube film, at least one composite carbon nanotube film, at least one composite carbon nanotube wire, or combinations thereof.

17. A coaxial cable comprising:

a plurality of cores, each of the cores comprising a carbon nanotube wire-like structure, at least one conductive coating wrapping the carbon nanotube wire-like structure, the carbon nanotube wire-like structure comprising a plurality carbon nanotubes orderly arranged;

a plurality of insulating layers, a shielding layer, and a sheathing layer;

each of the insulating layers wrapping each of the cores, the shielding layer wrapping all the cores with the insulating layers thereon, and the sheathing layer wrapping the outside surface of the shielding layer.

18. A coaxial cable comprising:

a plurality of cores, each of the cores comprising a carbon nanotube wire-like structure, at least one conductive coating wrapping the carbon nanotube wire-like structure, the carbon nanotube wire-like structure comprising a plurality carbon nanotubes orderly arranged;

a plurality of insulating layers, a plurality of shielding layers, and a sheathing layer;

each of the insulating layers wrapping the outside surface of each of the cores, each of the shielding layers wrapping the outside surface of a corresponding insulating layer, and the sheathing layer wrapping all the cores with the insulating layers and the shielding layers thereon.