Patent ID: 6452094
Filing Date: 2002-09-17
Classification: H01B

Abstract:
A cable for high speed transmission of electrical signals, said cable being characterized by having several insulated conductors therein and having far end crosstalk (FEXT), which is characterized by additive couplings among the several conductors in the cable along the length thereof, and to near end crosstalk (NEXT), said able having a core configuration for reducing FEXT relative to NEXT by reducing the additive coupling among the several conductors, said core configuration comprising:a plurality of twisted pairs of insulted conductors,at least one pair of which has a twist direction different from the twist direction of at least one other of said twisted pairs; each of said twisted pairs having a twist length that is different from the twist length of the other ones of said plurality of pairs to produce twist frequency differences (TFD) among the plurality of conductor pairs, adjacent pairs of said twisted pairs of opposite twist having a twist frequency difference (TFD) of 2 to 5; and a jacket surrounding said core and enclosing the twisted pairs of conductors.