A cable includes a plurality of substantially parallel conductors extending along a length of the cable and generally lying in a plane of the conductors, and a dielectric film having a plurality of pairs of structures, and folded upon itself along a longitudinal fold line so that the structures in each pair of structures face, and are aligned with, each other, each conductor of the plurality of conductors disposed between the structures in a corresponding pair of structures.

A differential signal transmission cable includes a conductor, a first dielectric covering the conductor, an outer conductor covering the first dielectric, a second dielectric covering the outer conductor and including a material with a higher transmission loss than the first dielectric, and a shield covering the second dielectric. A multi-core differential signal transmission cable includes a plurality of wires each including a conductor, a first dielectric covering the conductor and an outer conductor covering the first dielectric, a second dielectric covering all the plurality of wires and including a material with a higher transmission loss than the first dielectric, and a shield covering the second dielectric.

In one embodiment, a switched amplifier is provided to amplify a data transmission. The switched amplifier may use a control signal that is received via a control signal channel in a transmission cable. Also, the switched amplifier may detect signal power to determine whether the data transmission is received at one of a first port and a second port. Data transmissions via the data transmission channel occur in a first direction and a second direction in a same frequency range in a time division multiplex (TDD) mode. Also, the control signal and data transmission are diverted from the transmission cable that transmits a type of signal different from the control signal and the data transmission. The switched amplifier is controlled based on the control signal or the signal power detected. The amplified signal is diverted in the first direction or the second direction via the data transmission channel back to the transmission cable.

In one embodiment, a cable includes a conductive core and a dielectric material surrounding the conductive core along a length of the cable. The cable also includes a first shielding comprising braided tinned copper and a second shielding comprising aramid fibers having nickel physical vapor deposited thereon. The aramid fibers are braided about the first shielding to surround a majority of the first shielding along the length of the cable.

A multimodal polyethylene copolymer suitable for use in cable insulation comprising: (III) 45 to 55 wt % of a lower molecular weight component which is an ethylene copolymer of ethylene and at least one C3-12 alpha olefin comonomer, said LMW component having a density of 940 to 962 kg/m.sup.3 and an MFR.sub.2 of 50 to 500 g/10 min; (IV) 55 to 45 wt % of a higher molecular weight ethylene copolymer component of ethylene and at least one C3-12 alpha olefin comonomer;

wherein said multimodal polyethylene copolymer has a density of 940 to 950 kg/m.sup.3, an MFR.sub.2 of 0.05 to 2.0 g/10 min and preferably at least one of crystallization half time>3.0 mins at 120.5° C., a crystallization half time>5.0 mins at 121° C. or a crystallization half time>10.0 mins at 122° C.

In a communication cable having a multi-core cable with a plurality of core cables in which a pair of signal lines are covered with an insulator, in which the insulator is covered with a shield tape, and in which the shield tape is covered with a wrapping tape, and having a connector formed on an end portion of the multi-core cable, the communication cable further has a case which is inserted/removed to/from a slot formed on a communication device to which the communication cable is connected, a substrate which is housed in the case and to which an end portion of the multi-core cable is connected, and a resin portion which molds a connection portion between the end portion of the multi-core cable and the substrate.

A signal transmission cable includes a signal line, an insulation layer covering the signal line, and a shield layer covering the insulation layer. A first oxygen amount A.sub.1 on an outer peripheral surface of the insulation layer is 1.2 times or greater than a second oxygen amount A.sub.2 inside the insulation layer, or a contact angle on the outer peripheral surface the insulation layer is 130° or less, or an adhesion-wetting surface energy on the outer peripheral surface the insulation layer is 27 mJ/m.sup.2 or greater, or a first amount of a hydroxy group on the outer peripheral surface of the insulation layer is greater than a second amount of a hydroxy group inside the insulation layer.

Methods and systems are provided for designing, implementing, and/or using communication cables comprising a leaky feeder structure, which may be configurable for homogeneous distribution of data signals. An example communication cable may comprise a core conductor, an insulation shield surrounding the core conductor, an outer conductor around the insulation shield and having one or more apertures arranged along its length, and a jacket at least partly covering the outer conductor. The communication cable may also comprise an illumination arrangement which may be arranged at least along sections of the length of the cable. The illumination arrangement may comprise a plurality of light emitting units.

A cable includes a first metal conductor, a first insulator, a second metal conductor and a second insulator. The first insulator is at least partially wrapped on the first metal conductor. The second insulator is at least partially wrapped on the second metal conductor. The first metal conductor is adapted to transmit a first signal. The second metal conductor is adapted to transmit a second signal. The cable also includes an intermediate layer material at least partially wound on the first insulator and the second insulator. A dielectric constant of the intermediate layer material is lower than that of the first insulator, and the dielectric constant of the intermediate layer material is lower than that of the second insulator. With this arrangement, the cable of the present disclosure is capable of realizing low mode conversion and improving the high frequency characteristics.

A data cable has a specially arranged and embodied shielding foil. The shielding foil surrounds an insulated conductor and has multiple layers, including a conductive layer and at least one carrier layer on which the conductive layer is applied. The shielding foil is folded and has a fold around which the conductive layer is guided so that the conductive layer forms an upper face and a lower face. The shielding foil is wound around the insulated conductor. The shielding foil has multiple sequential windings that overlap in an overlap region in which the upper face in one of the multiple sequential windings makes contact with the lower face of a following one of the multiple sequential windings so as to form a continuous shielding configuration.