Signal phase delay controlled data cables having dissimilar insulation materials
US5834697A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Aug 1, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B11/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A communication cable includes at least a first and a second twisted pairs of conductors. The first twisted pair of conductors is covered by a first insulation material, and the second twisted pair of conductors is covered by a second insulation material that is different than the first insulation material. The second twisted pair of conductors has a signal phase delay that is substantially equal to the signal phase delay of the first twisted pair of conductors such that the skew of the cable is substantially zero. In certain embodiments, the first insulation material is a fluoropolymer. In such embodiments, the second insulation material may be a nonfluoropolymer. In addition, the twist lay of the first twisted pair of conductors may be different than the twist lay of the second twisted pair of conductors. Moreover, the thickness of the first insulation material may be different than the thickness of the second insulation material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.