Quad-shield coaxial cable

• US 10,332,654 B2
• Filed: 07/19/2017
• Issued: 06/25/2019
• Est. Priority Date: 07/19/2016
• Status: Active Grant

• Current Assignee: PPC Broadband Incorporated (Belden Inc.)
• Original Assignee: PPC Broadband Incorporated (Belden Inc.)
• Inventors: Lawrence, Michael E.
• Primary Examiner(s): Mayo, III, William H.
• Application Number:
  US15/654,600
• Publication Number:
  US 20180025811A1
• Time in Patent Office: 706 Days
• Field of Search: 174102 R, 174103, 174106 R, 174108, 174109, 174 74 R, 174 84 R, 174 88 C
• CPC Class Codes: H01B 11/1813 Co-axial cables with at least one braided conductor
• CPC Class Codes: H01B 11/1895 Particular features or applications
• CPC Class Codes: H01B 7/17 Protection against damage caused by external factors, e.g. sheaths or armouring
• CPC Class Codes: H02G 1/1202 by cutting and withdrawing insulation
• CPC Class Codes: H02G 1/14 for joining or terminating cables

Abstract

A quad-shield coaxial cable includes, an elongated center conductor extending along a longitudinal axis, an insulator coaxially surrounding the inner conductor, an inner conductive foil layer coaxially surrounding the insulator, an inner layer of braided shield coaxially surrounding the inner foil layer, an outer layer of braided shield coaxially surrounding the inner layer of braided shield, an outer conductive foil layer coaxially surrounding the outer layer of braided shield, and a jacket coaxially surrounding the outer conductive foil layer.

Claims

1. A quad-shield coaxial cable, comprising:

an elongated center conductor extending along a longitudinal axis;

an insulator coaxially surrounding the center conductor;

an inner conductive foil layer coaxially surrounding the insulator;

an inner layer of braided shield coaxially surrounding the inner foil layer,

an outer layer of braided shield coaxially surrounding the inner layer of braided shield;

an outer conductive foil layer coaxially surrounding the outer layer of braided shield; and

a jacket coaxially surrounding the outer conductive foil layer.

2. The quad-shield coaxial cable of claim 1, wherein the inner conductor is configured to carry data signals to and from a data network.

3. The quad-shield coaxial cable of claim 1, wherein the inner conductive foil layer, the inner layer of braided shield, the outer layer of braided shield, and the outer conductive foil layer are configured to block undesirable radiation or signal noise from leaving the cable.

4. The quad-shield coaxial cable of claim 1, wherein the inner conductive foil layer, the inner layer of braided shield, the outer layer of braided shield, and the outer conductive foil layer are configured to block undesirable radiation or signal noise from entering the cable.

5. The quad-shield coaxial cable of claim 1, wherein the inner layer of braided shield and the outer layer of braided shield are configured to facilitate easier insertion of such post in between the inner layer of braided shield and the inner conductive foil layer.

6. The quad-shield coaxial cable of claim 1, wherein the outer conductive foil layer is bonded to the jacket.

7. A method of preparing a terminal end of quad-shield coaxial cable for connection with a connector, the method comprising:

cutting a jacket and an outer conductive foil layer at a first step;

cutting an inner layer of braided shield, an outer layer of braided shield, an inner conductive foil layer, and an insulator at a second step, such that the inner layer of braided shield, the outer layer of braided shield, the inner conductive foil layer, and the insulator protrude from the jacket and the outer conductive foil layer at the terminal end of the cable, and such that the inner conductor protrudes from the inner layer of braided shield and the outer layer of braided shield, the inner conductive foil layer, and the insulator at the terminal end of the cable; and

simultaneously folding the inner layer of braided shield and the outer layer of braided shield backward onto the jacket.

8. The method of claim 7, wherein the outer conductive foil layer is removed together with the jacket without a separate step of scoring and peeling away the outer conductive foil layer.

9. A method of assembling a connector with a terminal end of a quad-shield coaxial cable, the method comprising:

preparing the terminal end of the quad-shield coaxial cable in accordance with claim 7; and

inserting a post of the connector between the inner layer of braided shield and the inner conductive foil layer.

10. The method of claim 9, wherein the inner layer of braided shield and the outer layer of braided shield are configured to reduce resistance to insertion of the post between the inner layer of braided shield and the inner conductive foil layer.