High-speed cable having increased current return uniformity and method of making same

• US 7,479,601 B1
• Filed: 05/06/2008
• Issued: 01/20/2009
• Est. Priority Date: 05/06/2008
• Status: Expired due to Fees

• Current Assignee: Lenovo International Limited (Lenovo Group Ltd.)
• Original Assignee: International Business Machines Corporation
• Inventors: Mutnury, Bhyrav M., Cases, Moises, de Araujo, Daniel N., Wilkie, Bruce J.
• Primary Examiner(s): Nguyen; Chau N
• Application Number:
  US12/115,586
• Time in Patent Office: 259 Days
• Field of Search: 174/102.R, 174/102.SP, 174/113.R
• US Class Current: 174/102.00R
• CPC Class Codes: H01B 11/203 forming a flat arrangement

Abstract

A Twinax cable include a first axial cable having an inner diameter portion and an outer diameter portion and including a conductor surrounded by a dielectric material. A second axial cable has an inner diameter portion and an outer diameter portion and including a conductor surrounded by a dielectric material, the second axial cable being arranged such that a portion of the inner diameter thereof contacts the inner diameter portion of the first axial cable. A drain conductor is disposed between at least a portion of the inner diameter portion of the first axial cable and the inner diameter portion of the second axial cable. In addition, the a first foil layer contacts at least a portion of the outer diameter portion of the first axial cable and a second foil layer contacts at least a portion of the outer diameter portion of the second axial cable. An outer foil layer surrounds the first ax cable, the second axial cable, the first foil layer and the second foil layer.

Claims

1. A cable comprising:

a first axial cable having an inner diameter portion and an outer diameter portion and including a conductor surrounded by a dielectric material;

a second axial cable having an inner diameter portion and an outer diameter portion and including a conductor surrounded by a dielectric material, the second axial cable being arranged such that a portion of the inner diameter thereof contacts the inner diameter portion of the first axial cable;

a drain conductor disposed between at least a portion of the inner diameter portion of the first axial cable and the inner diameter portion of the second axial cable;

a first smooth and non-currogated foil layer contacting at least a portion of the outer diameter portion of the first axial cable;

a second smooth and non-currogated foil layer contacting at least a portion of the outer diameter portion of the second axial cable; and

a metal outer foil layer which surrounds the first axial cable, the second axial cable, the first foil layer and the second foil layer;

wherein the first foil layer does not contact the second foil layer.

2. The cable of claim 1, wherein the first foil layer does not contact the inner diameter portion of the first axial cable and the second foil layer does not contact

the inner diameter portion of the second axial cable.