Communication cable of high capacity
In communication cable of high capacity according to present invention, conductor of diameter d is coated by insulation material to form wire of diameter D, plural number of said wire are twisted by pitch p to form pairs, plural number of said pairs are twisted by collective pitch P, and said communication cable of high capacity comprise sheath wrapping said pairs, and impedance (Z) of said wire is from 90 to 110, and, diameter (d) of said conductor is from 0.53 mm to 0.65 mm, and diameter (D) of wire is from 0.9 mm to 1.1 mm, and said pitch (p) is from 8 mm to 25 mm, and said collective pitch (P) is from 40 mm to 150 mm, and relative ratio of diameter of wires to diameter of conductor D/d is from 1.625 to 1.835. And, by impedance matching between equipment for data transmission, return loss of cable can be minimized, so high speed data transmission can be made.
1. In communication cable of high capacity, conductor of diameter d is coated by insulation material to form wire of diameter D,
plural number of wires are twisted by pitch p to form pairs,
plural number of said pairs are twisted by collective pitch P,
wherein, said communication cable of high capacity comprise sheath wrapping said pairs,
the impedance (Z) of said wire is from 90 to 110,
diameter (d) of said conductor is from 0.53 mm to 0.65 mm,
diameter (D) of said wire is from 0.9 mm to 1.1 mm,
pitches (p) of said pairs are from 8 mm to 25 mm,
collective pitch (P) is from 40 to 150 mm,
relative ratio of diameter of wires to diameter of conductor D/d is from 1.625 to 1.835.
2. Communication cable of high capacity according to claim 1 , wherein, pitches (p) of said plural pairs are different from one another.
3. Communication cable of high capacity according to claim 2 , wherein, the relationship between pitches (p) of said plural pairs and diameters (D) of said wires are, if pitch of one pair is larger than pitch of another pair, diameter of wire in the pair that has larger pitch is smaller than diameter of wire in the pair that has smaller pitch.
4. Communication cable of high capacity according to one of claims 1 to 3 , wherein, said communication cable further comprises separator for separating said plural pairs.
5. Communication cable of high capacity according to claim 4 , wherein, said separator has cross section of cross shape.