Flexible cables may include multiple power, ground, and signal traces, and include EM interference suppression devices within the cable itself. Signal traces may be shielded by ground traces. The body of a cable may be divided into lateral portions through which different types of traces extend. One lateral side of a cable body may include a stack of power traces, while another lateral side of the cable body may include ground and signal traces. EBG patterns may be incorporated into ground traces. Capacitors may be positioned within the cable along its length, mounted between power and ground traces, for decoupling.

Example proximity sensors are described. The proximity sensor can include a transceiver unit, and a leaky coaxial cable operably coupled to the transceiver unit. The proximity sensor described herein can be used with a steering wheel. For example, the leaky coaxial cable can be embedded in the steering wheel.

Described herein are apparatuses and methods for applying high voltage, high current, sub-microsecond (e.g., nanosecond range) pulsed output to a biological material, e.g., tissues, cells, etc., while preventing damage from load arcing. Some of the apparatuses and methods described herein may limit the load and pulsed power source current in case of load arcing significantly by using a transmission line (e.g., coaxial cable, twisted pair or parallel pair cables) between the pulsed power source and the load having a length configured to achieve this goal.

Described herein are apparatuses and methods for applying high voltage, high current, sub-microsecond (e.g., nanosecond range) pulsed output to a biological material, e.g., tissues, cells, etc., while preventing damage from load arcing. Some of the apparatuses and methods described herein may limit the load and pulsed power source current in case of load arcing significantly by using a transmission line (e.g., coaxial cable, twisted pair or parallel pair cables) between the pulsed power source and the load having a length configured to achieve this goal.

A coaxial cable includes an inner conductor having one center wire, and six outer wires stranded around the center wire, an insulator covering an outer periphery of the inner conductor, and a shield conductor covering an outer periphery of the insulator, wherein, in a cross section perpendicular to a longitudinal direction of the coaxial cable, a ratio of a total area of first regions which are respectively formed by a gap between the center wire and two adjacent outer wires, with respect to an area of a circle of the inner conductor, is 0.5% or higher and 2.0% or lower, and a ratio of a total area of second regions which are respectively formed by a gap between surfaces of the two adjacent outer wires and a surface of the insulator, with respect to the area of the circumscribed circle of the inner conductor, is 2.0% or higher and 5.0% or lower.

To provide a coaxial cable with a favorable appearance and excellent processability. The above-described problem is solved by a coaxial cable comprising a center conductor (11), an insulator (12) provided on an outer periphery of the center conductor (11), an external conductor (13, 14) provided on an outer periphery of the insulator (12), and an outer coated body (15, 16) covering the external conductor (13, 14). The external conductor (13, 14) is constituted by a lateral winding shield (13) provided with metal fine wires laterally wound on the outer periphery of the insulator (12), and a metal resin tape (14) wound in a layer on the lateral winding shield (13) with a metal layer side being on an inside. The outer coated body (15, 16) is constituted by a resin tape (15) wound on the metal resin tape (14), and an extruded sheath (16) covering the resin tape (15). Given T1 as a thickness of the metal resin tape (14) and T2 as a thickness of the resin tape (15), T2/T1 is within a range from 0.180 to 0.800.

A wire assembly and antenna that is configured to transmit and receive radio frequency signals and can withstand high temperatures is disclosed. The wire assembly includes a first and second wire formed from copper, steel, copper coated steel, or metallic alloy, and the wires are spaced apart from each other by a predetermined distance. This predetermined distance is maintained via applying tension to the wires and/or using separator nodes or other spacing elements. Various components of the system disclosed herein are formed from fire proof or fire resistant materials, such that the components will not fail or be compromised under extreme heat and flames.

A local coil for magnetic resonance imaging is disclosed herein. The local coil includes an electrical circuit arrangement and a coaxial cable with an internal conductor and an external conductor surrounding the internal conductor. The two ends of the coaxial cable are connected to the electrical circuit arrangement and the internal conductor and the external conductor together form an antenna loop. The internal conductor and/or the external conductor has at least one interruption and the at least one interruption divides the internal conductor and/or the external conductor into at least two separate segments in each case.

A power and communications cable may include an electromagnetic waveguide, an inner metallic tubular surrounding the electromagnetic waveguide, an electrically conductive material surrounding the inner metallic tubular, an electrically insulating material surrounding the electrically conductive material, and an outer metallic tubular resistant to corrosion and abrasion surrounding the electrically insulating layer. The example system may include an electrical device locatable in the wellbore and coupleable to the cable and a control unit coupleable to the cable and operable to supply power to and communicate with the electrical device via the power and communications cable.

A power and communications cable may include an electromagnetic waveguide, an inner metallic tubular surrounding the electromagnetic waveguide, an electrically conductive material surrounding the inner metallic tubular, an electrically insulating material surrounding the electrically conductive material, and an outer metallic tubular resistant to corrosion and abrasion surrounding the electrically insulating layer. The example system may include an electrical device locatable in the wellbore and coupleable to the cable and a control unit coupleable to the cable and operable to supply power to and communicate with the electrical device via the power and communications cable.