A dual axial cable may include two substantially parallel and substantially adjacent wires, each wire formed from an electrical conductor surrounded throughout its length by a bifurcated electrical insulator. Each bifurcated electrical insulator may include a first portion of electrically insulative material and a second portion of electrically insulative material having a dielectric constant substantially higher than a dielectric constant of the first portion, such that a cross-section of each wire includes its respective first portion and respective second portion. The cable may be configured such that throughout the length of the cable, the second portions of each of the two wires are substantially adjacent to each other.

A coaxial juncture assembly 10 has a characteristic impedance Z.sub.0 and comprises an inner conductive formation 32 having opposed first and second ends 34.1, 34.2 which are connectable to an inner conductor of a coaxial cable and an inner conductor 18 of a port respectively. The cable has a characteristic impedance Z.sub.0 and the inner conductor has a diameter d.sub.1. The formation 32 has an outer diameter d.sub.1, which is larger than d.sub.1. A conductive tubular member 36 has an inner diameter D.sub.1, a first end 38.1, a second end 38.2, a slot 40 and an inner surface area A.sub.inner. The member 36 is connectable at end 38.1 thereof to an outer conductor of the cable and at the end 38.2 to an outer conductor of the port. The assembly 10 comprises a dielectric arrangement 42 having a dielectric constant .sub.eff. At least one of: a) .sub.eff and b) A.sub.inner is configured such that a difference between Z.sub.o and Z.sub.o is less than 3% and D.sub.1 and D.sub.1 varies by less than 5%.

The present invention relates to a communication line. The communication line according to an embodiment of the present invention includes at least one core portion including a dielectric core extending in a longitudinal direction and a rib member formed on an outer surface of the dielectric core, and a shielding portion including a shielding having a hollow tubular shape and a rail member formed to extend on an inner surface of the shielding and extending along the shielding in the longitudinal direction, wherein the at least one core portion is inserted into the shielding portion.

A coaxial cable includes a center conductor, a dielectric coating applied to the center conductor forming an insulator surrounding the center conductor, a metallization layer applied to the insulator forming a cable shield surrounding the insulator, and an outer jacket covering the cable shield, wherein the coaxial cable has a wire gauge of 54 AWG or smaller. A method of manufacturing a coaxial cable includes providing a center conductor, coating the center conductor with a dielectric coating to form an insulator surrounding the center conductor, covering the insulator with a metallization layer to form a cable shield surrounding the insulator, and covering the cable shield with an outer jacket, wherein the coaxial cable has a wire gauge of 54 AWG or smaller.

A signal cable for an AC-coupled link, may include: a signal conductor; a dielectric surrounding the signal conductor; and a ground sheath having a conductive layer disposed at least partially around the conductor such that the dielectric is positioned between the ground sheath and the signal conductor, wherein the conductive layer comprises a first portion extending in a first direction along the cable and a second portion extending in a second direction, opposite the first direction, along the cable and further wherein the first and second portions of the conductive layer are separated from each other by a gap, the gap being dimensioned to provide a determined amount of capacitance in series in the ground sheath. The gap may form a complete separation between the first and second portions of the conductive layer.