Data transmission cable
AssigneeAlcatel
InventorDaniel Prudhon
Life of this patent
Estimating the term…
Abstract
A data transmission cable having at least one unit of at least four conductors twisted into sets of conductors, which sets are quads or pairs, each conductor set being twisted at a pitch that is different from the pitch of any other conductor set, and each conductor being insulated by an insulating sheath. The unit being covered by at least one assembly structure, wherein the material used for the insulating sheath of any conductor in a given set of conductors has a relative dielectric constant that is different from that of the material used for the insulating sheath of any conductor in another set of conductors, such that the propagation time differences between the conductors of the set of conductors and the conductors of the other set of conductors is less than 2 ns/100 m.
Claims25
A data transmission cable comprising a unit of at least two sets of twisted conductors, each set of twisted conductors being one of a quad set in which four conductors are twisted together and a pair set in which two conductors are twisted together, and wherein each set of twisted conductors are twisted at a pitch that is different from that of each remaining set of twisted conductors, and wherein each conductor is insulated by a respective insulating sheath, said unit being covered by at least one assembly, and wherein material used for the respective insulating sheath of any conductor in a given set of twisted conductors has a relative dielectric constant that is different from that of material used for the respective insulating sheath of each conductor in each remaining set of twisted conductors such that propagation time differences between the conductors of said given set of twisted conductors and of any other set of twisted conductors is less than 2 ns/100 m.
A data transmission cable comprising a unit of at least two sets of twisted conductors, each set of twisted conductors including at least two conductors twisted together, and wherein each set of twisted conductors are twisted at a pitch that is different from that of each remaining set of twisted conductors, and wherein each conductor is insulated by a respective insulating sheath, said unit being covered by at least one assembly, and wherein material used for the insulating sheath of each conductor in a given set of twisted conductors has a relative dielectric constant that is different from that of material used for the respective insulating sheath of each conductor in each remaining set of twisted conductors;
- and
- wherein said relative dielectric constant of said material used for the insulating sheath of each conductor in said given set of twisted conductors is different from that of said material used for the respective insulating sheath of each conductor in each remaining set of twisted conductors such that propagation time differences between the conductors of said given set of twisted conductors and of any other set of twisted conductors is less than 5 ns/100 m.
Dependencies are inferred from the claim text.