Twisted parallel cable
US5606151A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1993 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Mar 17, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B11/002
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This patent describes a cable which is exceptionally suitable for high frequency signal transmission which includes at least two adjoined insulated conductors which are twisted together to form a pair. The pair(s) of adjoined insulated conductors are preferably encased within a thermoplastic, fluorocopolymer, or rubber type material. The embodiment may employ a metallic shield under the encasement. The variation of center to center conductor spacing within a pair as described above should be less than a value equal to about 0.03 times the statistical average of the center to center conductor spacing. The preferred cable has an average impedance of 90 to 110 ohms with a tolerance of .+-.5% when measured at high frequencies along any 1000 ft. of cable. Additionally, the two adjoined insulated conductors should have an adhesion strength of no more than 5 lbs. force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.