A cable has a first conductive core configured from a first strand of carbon nanotubes (CNTs), a first copper coating surrounding the strand of CNTs along a length of the cable. The cable also has a first shielding configured from CNTs and copper and surrounding the first core along the length of the cable. The cable also has a second shielding configured from CNTs and copper and surrounding the first shielding along the length of the cable. The cable also has a jacket surrounding the second shielding along the length of the cable.

A cable apparatus is disclosed which can include at least one metal stranded center conductor, and a metal foil wrap that surrounds and wraps the at least one metal stranded center conductor. In addition, the cable apparatus can include an insulating layer that surrounds the metal foil wrap, and may include a shielding that surrounds and encapsulates the insulating layer. A jacket can surround the shielding. The cable apparatus can be used in coaxial, twin-coaxial, and twisted pairs wire arrangements.

Disclosed is a radiating coaxial cable wherein at least one geometric property of the radiating apertures of the cable conductive shield is varied longitudinally, so as to longitudinally vary the shape of the radiation pattern of the cable in a predefined way. Such radiating coaxial cable allows providing a non-uniform radiofrequency coverage by installing a single cable. For example, in a building with different areas having different coverage requirements, the geometric properties of the radiating apertures of the cable may be varied so as to longitudinally vary the shape of the radiation pattern to meet the coverage requirements of the various areas crossed by the cable.

A high frequency cable includes a center conductor comprising one first wire, which is located at the center of the center conductor, and a plurality of second wires, which are located around that one first wire, and the one first wire and the plurality of second wires are stranded together. Respective outer peripheral surfaces of the plurality of second wires constitute a substantially continuous circular peripheral surface as an outer peripheral surface of the center conductor.

A high frequency signal transmission cable includes a conductor, an insulator provided over a periphery of the conductor, a plating layer provided over a periphery of the insulator, and a sheath provided over a periphery of the plating layer. A crack suppressing layer is provided between the insulator and the plating layer, in such a manner as to remain in contact with the insulator while being provided with the plating layer over an outer surface of that crack suppressing layer. The crack suppressing layer is composed of a resin film to suppress the occurrence of a cracking in the plating layer by bending while moving in a longitudinal direction of the cable relative to a bending of the insulator.

Aspects of the subject disclosure may include, for example, a transmission medium for propagating electromagnetic waves. The transmission medium can include a core for propagating electromagnetic waves guided by the core without an electrical return path, a rigid material surrounding the core, wherein an inner surface of the rigid material is separated from an outer surface of the core, and a conductive layer disposed on the rigid material. Other embodiments are disclosed.

A cable includes: a pair of core wires; an insulating layer covering the pair of core wires; a shielding layer covering the insulating layer; and an outer insulating layer covering the shielding layer; wherein the shielding layer is a double-layer metal foil.

A plug-in device is provided for adapting a building's electrical wiring system as an antenna for receiving radio or over-the air television signals. The device has a plug for insertion into an electrical receptacle in the building, a coaxial connector for providing the communication signal captured by the antenna to a signal receiver, and a plurality of conducting wires extending from the plug to the coaxial connector. The conducting wires comprise first and second wires, and a third wire in electrical contact with the coaxial connector. The first and second wires are electrically insulated from each other and from the third wire to prevent passage of alternating current (AC) power to the signal receiver. The wires are wound to inductively transfer the communication signal captured by the antenna to the third wire for output to the signal receiver via the coaxial connector.

One cable shielding has a first metal shielding braided along a length of a cable, a CNT paper shielding surrounding the first metal shielding along the length of the cable, and a second metal shielding braided about the CNT paper shielding along the length of the cable.

A high frequency signal transmission cable includes a conductor, an insulator provided over a periphery of the conductor, a plating layer provided over a periphery of the insulator, and a sheath provided over a periphery of the plating layer. A crack suppressing layer includes a non-cross-linked polyethylene is provided between the insulator and the plating layer, in such a manner as to remain in contact with the insulator while being provided with the plating layer over an entire periphery of a roughened outer surface of the crack suppressing layer. The crack suppressing layer is unadhered to the insulator. The plating layer is adhered to the crack suppressing layer. The crack suppressing layer suppresses an occurrence of a cracking in the plating layer by bending together with the plating layer while being integral and moving with the plating layer in a longitudinal direction of the cable.