Cable Shielding Assembly and Process of Producing Cable Shielding Assembly

Patent metadata

Field	Value
Publication number	US-2016302334-A1
Application number	US-201514684276-A
Country	US
Kind code	A1
Filing date	Apr 10, 2015
Priority date	Apr 10, 2015
Publication date	Oct 13, 2016
Grant date	—

Abstract

Cable shielding assemblies and processes of producing cable shielding assemblies are described. The cable shielding assemblies include a conductor and a conductive composite shield extending around at least a portion of the conductor, the conductive composite shield having a non-conductive matrix and conductive particles within the non-conductive matrix. The conductive composite shield has a resistivity of less than 0.05 ohm·cm. The processes of producing cable shielding assembles include positioning the conductive composite shield. The positioning is at least partially around a conductor, at least partially around a dielectric material, at least partially surrounded by a jacket material, or a combination thereof.

First claim

What is claimed is:

1 . A cable shielding assembly, comprising:
a conductor; and a conductive composite shield extending around at least a portion of the conductor, the conductive composite shield having a non-conductive matrix and conductive particles within the non-conductive matrix; wherein the conductive composite shield has a resistivity of less than 0.05 ohm·cm.

2 . The cable shielding assembly of claim 1 , further comprising a dielectric material extending around at least a portion of the conductor, wherein the conductive composite shield extends around at least a portion of the dielectric material.

3 . The cable shielding assembly of claim 1 , further comprising a jacket material extending around at least a portion of the conductive composite shield.

4 . The cable shielding assembly of claim 3 , wherein the jacket material and the conductive composite shield are at least partially co-extruded.

5 . The cable shielding assembly of claim 3 , further comprising a drain wire embedded and electrically terminated between the conductive composite shield and the jacket material and extending from the cable shielding assembly.

6 . The cable shielding assembly of claim 1 , wherein the conductive composite shield has a resistivity of between 0.008 ohm·cm and 0.025 ohm·cm.

7 . The cable shielding assembly of claim 1 , wherein the conductive composite shield has a thickness of between 0.4 mm and 2 mm.

8 . The cable shielding assembly of claim 1 , wherein the conductive composite shield has a thickness of between 0.1 mm and 0.46 mm.

9 . The cable shielding assembly of claim 1 , wherein the shielding effectiveness of the conductive composite shield exceeds shielding effectiveness of double shields of braids and metal tape within a frequency range of at least throughout 5 GHz to 67 GHz, the braids being silver-plated copper braids having a 3.58 millimeter thickness and the metal tape being silver-plated copper tape having a 3.25 millimeter thickness.

10 . The cable shielding assembly of claim 1 , wherein the shielding effectiveness of the conductive composite shield exceeds shielding effectiveness of double shields of braids and metal tape within a frequency range of at least throughout 5 GHz to 30 GHz, the braids being silver-plated copper braids having a 3.58 millimeter thickness and the metal tape being silver-plated copper tape having a 3.25 millimeter thickness.

11 . The cable shielding assembly of claim 1 , wherein the shielding effectiveness of the conductive composite shield exceeds shielding effectiveness of double shields of braids and metal tape within a frequency range of at least throughout 40 GHz to 67 GHz, the braids being silver-plated copper braids having a 3.58 millimeter thickness and the metal tape being silver-plated copper tape having a 3.25 millimeter thickness.

12 . The cable shielding assembly of claim 1 , wherein the shielding effectiveness of the conductive composite shield overlaps shielding effectiveness of double shields of braids and metal tape within a frequency range of at least throughout 5 GHz to 7 GHz, the braids being silver-plated copper braids having a 3.58 millimeter thickness and the metal tape being silver-plated copper tape having a 3.25 millimeter thickness.

13 . The cable shielding assembly of claim 1 , wherein the shielding effectiveness of the conductive composite shield overlaps shielding effectiveness of double shields of braids and metal tape within a frequency range of at least throughout 5 GHz to 12 GHz, the braids being silver-plated copper braids having a 3.58 millimeter thickness and the metal tape being silver-plated copper tape having a 3.25 millimeter thickness.

14 . The cable shielding assembly of claim 1 , wherein the shielding effectiveness of the conductive composite shield overlaps shielding effectiveness of double shields of braids and metal tape within a frequency range of at least throughout 42 GHz to 67 GHz, the braids being silver-plated copper braids having a 3.58 millimeter thickness and the metal tape being silver-plated copper tape having a 3.25 millimeter thickness.

15 . The cable shielding assembly of claim 1 , wherein the non-conductive matrix includes material selected from the group consisting of polyvinylidene fluoride (PVDF), copolymers of vinylidene fluoride (VDF) and hexafluoropropylene (HFP), terpolymers of VDF, HFP and tetrafluoroethylene (TFE), fluorinated ethylene propylene, ethylene tetrafluoroethylene, polytetrafluoroethylene, a fluorinated matrix compatible with the conductive particles, and combinations thereof.

16 . The cable shielding assembly of claim 1 , wherein the non-conductive matrix includes material selected from the group consisting of polyethylene, polypropylene, ethylene-vinyl acetate, polyamide, neoprene, and combinations thereof.

17 . The cable shielding assembly of claim 1 , wherein the conductive particles include particles selected from the group consisting of copper particles, tin particles, nickel particles, aluminum particles, carbon particles, carbon black, carbon nanotubes, graphene, silver-coated particles, nickel-coated particles, or a combination thereof.

18 . The cable shielding assembly of claim 1 , wherein the conductive particles include carbon black, carbon nanotubes, graphene, or a combination thereof.

19 . A cable shielding assembly, comprising:
a conductor; a dielectric material extending around at least a portion of the conductor; a conductive composite shield extending around at least a portion of the conductor and at least a portion of the dielectric material, the conductive composite shield having a non-conductive matrix and conductive particles within the non-conductive matrix; a jacket material extending around at least a portion of the conductive composite shield; wherein the conductive composite shield has a resistivity of less than 0.05 ohm·cm.

20 . A process of producing a cable shielding assembly, the process comprising:
positioning a conductive composite shield, the conductive composite shield having a non-conductive matrix and conductive particles within the non-conductive matrix; wherein the positioning is at least partially around a conductor, at least partially around a dielectric material, at least partially surrounded by a jacket material, or a combination thereof; wherein the conductive composite shield has a resistivity of less than 0.05 ohm·cm.

Assignees

• Tyco Electronics Corp

Inventors

• Wang Jialing
• Lloyd Richard B
• Gao Ting
• Das Jaydip

Classifications

• H05K9/0098 Primary

  for shielding electrical cables · CPC title

• H01B7/0216

  Two layers · CPC title

• H01B1/22

  the conductive material comprising metals or alloys · CPC title

• H01B3/004 Primary

  with conductive additives or conductive layers · CPC title

• H01P3/06

  Coaxial lines · CPC title