Coaxial cable

• US 4,847,448 A
• Filed: 05/04/1988
• Issued: 07/11/1989
• Est. Priority Date: 07/21/1987
• Status: Expired due to Term

• Current Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Original Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Inventors: Sato, Kazuhiro
• Primary Examiner(s): Nimmo, Morris H.
• Application Number:
  US07/190,173
• Time in Patent Office: 433 Days
• Field of Search: 174/103, 174/106 R, 174/36, 174/108, 333/243
• US Class Current: 174/103
• CPC Class Codes: H01B 11/1817 Co-axial cables with at least one metal deposit conductor
• CPC Class Codes: H01B 11/1821 Co-axial cables with at least one wire-wound conductor

Abstract

A coaxial cable having a tape with a metal deposited thereon which is wound over a laterally wound shielding layer which is, in turn, formed over an insulation layer about the conductor. The tape includes a plastic tape and a metal layer deposited on the plastic tape, and the tape is disposed such that the metal layer is in contact with the laterally wound shielding layer. Improved high frequency shielding characteristics are obtained using this structure without sacrificing cable flexibility.

Claims

1. A coaxial cable having a central conductor, comprising:

an insulation layer wound around said conductor;

a laterally wound shielding layer formed of a plurality of wires wound at a predetermined pitch around said insulation layer; and

a metal tape wound over said shielding layer, said tape including a plastic tape and a metal layer which is deposited on said plastic tape, said metal layer being in contact with said shielding layer.

2. A coaxial cable as claimed in claim 1, wherein said metal layer has a thickness of at least 0.2 μ

m.

3. A coaxial cable as claimed in claim 1, wherein said metal layer has a thickness of approximately 1 μ

m.

4. A coaxial cable as claimed in claim 1, wherein said metal layer is formed of at least one of copper and tin.

5. A composite coaxial cable comprising:

a plurality of coaxial cables having a central conductor, said coaxial cables being spirally wound about each other, each of said coaxial cables comprising an insulation layer wound around said concductor, a laterally wound shielding layer formed of a plurality of wires wound at a predetermined pitch around said insulation layer, and a tape wound over said shielding layer, said tape including a plastic tape and a metal layer which is deposited on said plastic tape, said metal layer being in contact with said shielding layer; and

an outer cover layer formed over said spirally wound coaxial cables.