A cable includes a pair of insulation core wires arranged to extend longitudinally parallel to each other, each of the insulation core wires has a central conductor and a wire insulation layer circumferentially wrapped around the center conductor, a first insulation tape layer and a second insulation tape layer wrapped outside the first insulation tape layer, and a metal shielding layer wrapped outside the second insulation tape layer. The first insulation tape layer is wrapped outside the wire insulation layers of the pair of insulation core wires to fix the pair of insulation core wires and cause the wire insulation layers of the pair of insulation core wires to abut against each other and deform at outer peripheries of a pair of sides of the wire insulation layers facing each other.

A USB cable structure includes a cable body and a plurality of wires. The cable body extends a length along an axial direction and forms an inner space, and the inner space forms an elliptical cross-section in the radial section of the cable body perpendicular to the axial direction. The plurality of wires are arranged in the elliptical inner space of the cable body, and the diameter of the wire can be increased by the enlarged elliptical inner space to reduce the attenuation of the transmission signal, thereby extending the length of the transmission cable to transmit the signal to a longer distance without the assistance of the attenuation compensation chip.

A shielded electrical ribbon cable includes adjacent first and second longitudinal conductor sets where each conductor set includes two or more insulated conductors. The first conductor set also includes a ground conductor that generally lies in the plane of the insulated conductors of the first conductor set. At least 90% of the periphery of each conductor set is encompassed by a shielding film. First and second non-conductive polymeric films are disposed on opposite sides of the cable and form cover portions substantially surrounding each conductor set, and pinched portions on each side of each conductor set. When the cable is laid flat, the distance between the center of the ground conductor of the first conductor set and the center of the nearest insulated conductor of the second conductor set is σ1, the center-to-center spacing of the insulated conductors of the second conductor set is σ2, and σ1/σ2 is greater than 0.7.

A data cable is provided herewith, along with related methods. The disclosed data cables may meet the requirements for a UL 2196 flame test, including subsequent hose stream test. The disclosed data cables include two or more pairs of conductors wrapped with a flame-retardant tape and surrounded by low smoke zero halogen (LSZH) thermoset insulation. A shield may surround the conductor pairs and a non-halogen flame retardant polyolefin may surround the shield. In certain embodiments, the pairs of conductors present in the cable may have different lay lengths.

The present disclosure provides an electric cable, comprising two signal conductors, a resin insulating layer, an expanded polytetrafluoroethylene insulating film, an electromagnetic shielding film, two ground conductors, and a covering layer. The resin insulating layer covers the two signal conductors. The expanded polytetrafluoroethylene insulating film covers the resin insulating layer. The electromagnetic shielding film covers the expanded polytetrafluoroethylene insulating film. The two ground conductors are disposed at two sides of the electromagnetic shielding film. The cladding layer clads the electromagnetic shielding film and the two ground conductors. Through the expanded polytetrafluoroethylene insulating film, the electric cable can be applied to compact products, and the electric cable can be highly flexible such that the signal transmission performance would not be affected after being repeatedly bent.

A multicore cable includes a plurality of covered wires having a lubricant powder provided on surfaces thereof, and an outer sheath layer covering outer surfaces of the plurality of covered wires. The outer surfaces of the plurality of covered wires, and the outer sheath layer, make contact with one another via the lubricant powder. A coverage of the outer surfaces of the plurality of covered wires by the lubricant powder is greater than or equal to 15%.

A circuit board assembly has a circuit board and a high-speed cable. The high-speed cable has two signal lines, a ground conductor, an impedance-reducing conductor, and a covering material. The signal lines, the ground conductor, and the impedance-reducing conductor are mounted through the entire high-speed cable. The covering material wraps the signal lines, the ground conductor, and the impedance-reducing conductor, and has a conductive layer and an isolation layer as an inner layer and an outer layer respectively. The conductive layer has multiple loops electrically connected to the ground conductor and the impedance-reducing conductor. Thus, the impedance in the covering material, the ground conductor, and the impedance-reducing conductor is decreased, which prevents from attenuating the signal intensity during transmission at high frequency.

A method of twisting a pair of wires includes the steps of arranging a first wire parallel to a second wire along a longitudinal axis, securing ends of the first and second wires, and gripping outer surfaces of central portions of the first and second wires. The inner surfaces of the central portions of the first and second wires are in contact with one another. The method further includes deflecting central portions of the first and second wires orthogonally from the longitudinal axis and rotating the central portions of the central portions of the first and second wires, thereby twisting the first and second wires about one another.

A differential signal transmission cable includes: an insulating electric wire having a pair of conductive wires and an insulating layer covering the pair of conductive wires; a shield tape wound around an outer periphery of the insulating electric wire; a first tape wound around an outer periphery of the shield tape and having a first resin covering layer; and a second tape wound around an outer periphery of the first tape and having a second covering layer. The second covering layer is made of a high softening point material having a softening point that is higher than a softening point of the first resin covering layer.

A cable with a non-circular ground wire is provided, including two wires, two ground wires, and an insulating tape; wherein the inner sides of the wires are in contact with each other; the ground wires are respectively arranged on two opposite sides of the wires; each ground wire at least includes a first side surface, a second side surface, and a third side surface; the first and second side surfaces respectively contact the outer surfaces of the two wires, and the shapes of the first side surface and the second side surface respectively correspond to the shapes of the outer surfaces of the two wires; the insulating tape covers the outer surfaces of the wires and the third sides of the ground wires. Thereby, the mechanical properties of the cable of the present invention, such as small impedance variation of high-frequency signal transmission, transmission stability, structural flexibility and bending, can be significantly improved.