A coaxial cable includes a central conductor, a plurality of insulating twisted threads or insulation strings wound therearound, each insulating twisted thread including a plurality of insulating strings twisted together, a cover layer provided around the insulating twisted threads or the insulation strings to form a gap to the insulating twisted threads or the insulation strings, and an outer conductor and a jacket provided on the outer periphery of the cover layer.

Systems and methods for making an electrical cable. The electrical cable comprises: an inner conductor member formed of a conductive material; a dielectric member disposed as a single non-solid layer on the inner conductor member such that the inner conductor member is only partially covered by the dielectric member (the dielectric member being formed of a silica material (a) with a melting point equal to or greater than 1500 F., (b) that does not experiences a transformation from a flexible material to a rigid material when exposed to temperatures less than 1000 F., and (c) that comprises 60% or more silica); and an outer conductor member that is formed of a conductive material, encompasses the dielectric member and the inner conductor member, and is coaxial with the inner conductor member.

A cable includes a pair of insulation core wires, a shielding layer and an air accommodating cavity. The pair of insulation core wires extend longitudinally parallel to each other. Each of the insulation core wires has a central conductor and a core wire insulation layer wrapped around the central conductor. The shielding layer is wrapped outside the pair of insulation core wires. The air accommodating cavity is formed between the core wire insulation layers of the pair of insulation core wires and the shielding layer, and is adapted to accommodate air.

A medical coaxial connector includes: an internal conductor configured to be electrically connected to an other-side inner conductor when the medical coaxial connector is connected to an other-side medical coaxial connector; an outer conductor electrically connected to the inner conductor, formed in a tubular shape surrounding the inner conductor, and configured to be electrically connected to an other-side outer conductor when the medical coaxial connector is connected to the other-side medical coaxial connector; and an insulating body that is placed on inner periphery side of the outer conductor and formed in a cylindrical shape surrounding the inner conductor. The insulating body is configured to be placed on inner periphery side of the other-side outer conductor and a leading end of the insulating body in a connection direction toward the other-side coaxial connector is configured to protrude more in the connection direction than the inner conductor.

Systems and methods presented herein provide reduced weight cabling using carbon nanotubes (CNTs). In one embodiment, a cable comprises a conductive core comprising a metalized strand of CNTs.

A wireline system includes a control system, a downhole tool, and a wireline cable coupling the downhole tool and the control system. The wireline cable includes a plurality of conductors, which includes a core conductor and a concentric conductor disposed around the core conductor, wherein two of the plurality of conductors form a conductor pair, and wherein each of the plurality of conductors is configured to transmit power, data, or both, between the control system and the downhole tool. The wireline cable further includes one or more insulative layers, wherein at least one insulative layer is disposed between any two conductors.

Provided is a signal transmission cable. The signal transmission cable includes: at least one pair of signal wires for transmitting a group of differential electronic signals, a first metal shielding film coated on a part of a surface of the at least one pair of signal wires; a second metal shielding film opposite to the first metal shielding film and coated on a part of a surface of the at least one pair of signal wires; and a first insulation film by which the first metal shielding film and the second metal shielding film are secured to the surface of the pair of signal wires. The first metal shielding film and the second metal shielding film are collectively coated on the entire surface of the at least one pair of signal wires, and the second metal shielding film partially overlaps the first metal shielding film.

A cable includes: a linear conductor; a plurality of resin hollow tubes which are disposed around the conductor so that an air layer is formed around the conductor and which extend in a longitudinal direction of the conductor; an insulating protective member configured to protect the conductor and the plurality of hollow tube; and a partitioning portion provided in at least one hollow tube among the plurality of hollow tubes, the partitioning portion being configured to partition an interior of the hollow tube.

A cable includes: a linear conductor; a plurality of resin hollow tubes which are disposed around the conductor so that an air layer is formed around the conductor and which extend in a longitudinal direction of the conductor; and an insulating protective member configured to protect the conductor and the plurality of hollow tubes.

Provided is a signal transmission cable. The signal transmission cable includes: at least one pair of signal wires for transmitting a group of differential electronic signals, a first metal shielding film coated on a part of a surface of the at least one pair of signal wires; a second metal shielding film opposite to the first metal shielding film and coated on a part of a surface of the at least one pair of signal wires; and a first insulation film by which the first metal shielding film and the second metal shielding film are secured to the surface of the pair of signal wires. The first metal shielding film and the second metal shielding film are collectively coated on the entire surface of the at least one pair of signal wires, and the second metal shielding film partially overlaps the first metal shielding film.