An electrical ribbon cable includes an insulated conductor extending along a longitudinal axis of the cable. The cable also includes a shielding film that carries the insulated conductor. The shielding film has a variable thickness defining a thickened rib portion and a thinned connecting portion, these portions being electrically conductive and extending along the longitudinal axis. The insulated conductor is disposed proximate the rib portion. The insulated conductor may be one of multiple insulated conductors that are organized into multiple conductor sets including at least a first and second conductor set, each conductor set including one or more of the insulated conductors, and the rib portion may be disposed between the first and second conductor sets.

A cable includes a first metal conductor, a first insulator, a second metal conductor and a second insulator. The first insulator includes a first arc-shaped surface. The second insulator includes a second arc-shaped surface. A distance between a central axis of the first metal conductor and a central axis of the second metal conductor is S. The first insulator and/or the second insulator are formed with a deformation surface at a position where the first insulator and the second insulator are in contact with each other. An outer diameter of a circle where the first arc-shaped surface is located and/or an outer diameter of a circle where the second arc-shaped surface is located is D, where S/D≤0.99. The cable of the present disclosure can achieve low mode conversion and improve high frequency characteristics.

The subject matter of the present disclosure may be embodied in devices, such as flexible wiring, that include: an elongated flexible substrate; multiple electrically conductive traces arranged in an array on a first side of the elongated flexible substrate; and an electromagnetic shielding layer on a second side of the elongated flexible substrate, the second side being opposite the first side, in which the elongated flexible substrate includes a fold region between a first electronically conductive trace and a second electrically conductive trace such that the electromagnetic shielding layer provides electromagnetic shielding between the first electronically conductive trace and the second electrically conductive trace.

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.

Electrical cables and optical waveguides are disclosed as including an electrically insulative foam. The electrically insulative foam can coat at least one electrical conductor of the electrical cable. The electrically insulative foam can coat the optical fiber of the waveguide. The electrically insulative foam can also define a waveguide.

Ribbon cables including a plurality of spaced apart substantially parallel conductors extending along a length of the cable and arranged along a width of the cable, and first and second insulative layers disposed on opposite sides of and substantially coextensive with the plurality of conductors along the length and width of the cable are described. Each insulative layer may be adhered to the conductors and may include alternating substantially parallel thicker and thinner portions extending along the length of the cable. The thicker portions of the first and second insulative layers are substantially aligned in one to one correspondence. Each corresponding thicker portion of the first and second insulative layers have at least one conductor in the plurality of conductors disposed therebetween. The thicker portions may have an effective dielectric constant less than 2.

A multi-core cable includes a plurality of coaxial cables being arranged in parallel with each other, and a synthetic resin covering member that collectively covers the plurality of coaxial cables. Each coaxial cable includes a center conductor, an insulator covering an outer periphery of the center conductor, and a metal outer conductor covering an outer periphery of the insulator. The covering member holds the plurality of coaxial cables in such a manner that the plurality of coaxial cables are aligned side by side along a direction perpendicular to a longitudinal direction of the plurality of coaxial cables. At least a part of the outer conductors of the plurality of the coaxial cables respectively contacts the covering member.

Electrical cables and optical waveguides are disclosed as including an electrically insulative foam. The electrically insulative foam can coat at least one electrical conductor of the electrical cable. The electrically insulative foam can coat the optical fiber of the waveguide. The electrically insulative foam can also define a waveguide.

The subject matter of the present disclosure may be embodied in devices, such as flexible wiring, that include: an elongated flexible substrate; multiple electrically conductive traces arranged in an array on a first side of the elongated flexible substrate; and an electromagnetic shielding layer on a second side of the elongated flexible substrate, the second side being opposite the first side, in which the elongated flexible substrate includes a fold region between a first electronically conductive trace and a second electrically conductive trace such that the electromagnetic shielding layer provides electromagnetic shielding between the first electronically conductive trace and the second electrically conductive trace.

A high frequency transmission cable is matched with a circuit board. The circuit board is equipped with a conducting portion and a grounding portion. The high frequency transmission cable includes a conducting wire, a first insulating layer surrounding the conducting wire, an aluminum foil layer and a second insulating layer. The aluminum foil layer surrounds the first insulating layer. An outer surface of the aluminum foil layer is a conducting surface. The second insulating layer surrounds the aluminum foil layer. The second insulating layer surrounds the conducting surface of the aluminum foil layer. The conducting wire is connected with the conducting portion. The conducting surface of the aluminum foil layer is connected with the grounding portion, so that the high frequency transmission cable has a grounding effect.