An antenna installation having an antenna and a wire assembly. The antenna has a first end and a second end, with the antenna having a radiative distribution pattern and RF input characteristics. The wire assembly is positioned in close proximity to the antenna. The wire assembly includes a conductor and an RF insulative wrap. The conductor has a first end and a second end and at least one conductive element extending between the first end and the second end. The RF insulative wrap encircles the conductor between the first end and the second end. The RF insulative wrap includes a magnetic sheet having a magnetic metal powder within a polymer matrix. A method of preparing a wire assembly as well as the wire assembly itself are likewise disclosed.

A sheath wave barrier (2) for suppressing electromagnetic RF coupling phenomena of an electrical cable (4) at a predetermined suppression frequency (coo) in a magnetic resonance (MR) imaging or spectroscopy apparatus, wherein the cable is configured as a shielded cable with at least one inner conductor (6) and a peripherally surrounding electrically conducting cable sheath (8), comprises a segment of said shielded cable and a primary inductor formed from said shielded cable segment between a first cable location (12) and a second cable location (14). A secondary inductor (16) formed by a conductor is concentrically arranged within or around the primary inductor between said first and second cable locations. The secondary inductor is electrically connected to the cable sheath at said first and second cable connections over respective first and second RLC network members (M1, M2), the primary and secondary inductors being configured in compensating manner such that magnetic field generated by said primary and secondary inductors is substantially cancelled in any region surrounding the sheath wave barrier.

A cable mantle for shield current suppression in a shielded cable includes a through hole for hosting the shielded cable; and a plurality of resonant elements; wherein each of the resonant elements includes

an inner tube-shaped conductive structure; an outer tube-shaped conductive structure; a first transversal conductive structure; a second transversal conductive structure; and

at least one capacitor bridging a gap between a first longitudinal portion of the outer tube-shaped conductive structure and a second longitudinal portion of the outer tube-shaped conductive structure, so that an electrical behavior of the inner tube-shaped conductive structure, the first longitudinal portion of the outer tube-shaped conductive structure, the second longitudinal portion of the outer tube-shaped conductive structure, the first transversal conductive structure, the second transversal conductive structure and the at least one capacitor is equivalent to a parallel resonant circuit defining a resonance frequency of the respective resonant element.

A communication cable includes a first leaky coaxial cable, a first leaky coaxial cable, and an approach cable. The first leaky coaxial cable has a first end and a second end connected to a communication device. The second leaky coaxial cable has a third end and a fourth end different from the first end and second end of the first leaky coaxial cable. The approach cable has a fifth end connected to the communication device and a sixth end connected to the third end of the second leaky coaxial cable, wherein the sixth end is positioned near the second end of the first leaky coaxial cable.

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 coaxial cable and method of construction thereof are provided. The coaxial cable includes an elongate central conductive member; a dielectric insulative layer encasing the central conductive member; an outer protective sheath, and a braided EMI shield layer including hybrid yarn sandwiched between the dielectric insulative layer and the outer protective sheath. The hybrid yarn includes an elongate nonconductive filament and an elongate continuous conductive wire filament. The wire filament is interlaced in electrical communication with itself or other wire filaments along a length of the EMI shield layer to provide protection to the central conductive member against at least one of EMI, RFI or ESD. The method includes providing a central conductive member; forming a dielectric insulative layer surrounding the central conductive member; braiding an EMI shield layer including hybrid yarn about the insulative layer, and forming an outer protective sheath about the braided EMI shield 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.

Apparatus and method for trapping RF on shields of a multiply shielded RF cable. In some embodiments, the RF trap shorts an outer conductor shield to an inner shield conductor of the cable successively at selected locations along an end length of the shield conductors. Some embodiments provide an RF-trap apparatus for blocking stray signals on a shielded RF cable that has two or more concentric peripheral shield conductors separated from one another by one or more electrically insulating layers, and at least one inner conductor for carrying RF signals. The RF trap apparatus includes: a first housing; and a plurality of projections configured be coupled to the first housing and to move to selectively electrically connect an outer shield conductor to an inner shield conductor by a pierce operation on the shielded RF cable.

A quad-shield coaxial cable includes an insulator portion configured to encircle an inner conductor portion, an inner conductive foil portion configured to encircle the insulator portion, an inner braided shield portion configured to encircle the inner conductive foil layer portion, an outer braided shield portion configured to encircle the inner braided shield portion, an outer conductive foil portion configured to encircle the outer braided shield portion, and a jacket portion configured to encircle the outer conductive foil portion.

A guarded coaxial cable assembly including at least a pair of conductors, one or more rails, and a jacket covering these parts such as a first rail extending alongside two nearby conductors, the rail and the conductors embedded in an outer electrically insulating jacket, the outer jacket having a pair of generally opposed bearing surfaces for bearing transverse loads, the rail operative to reduce outer jacket deformations resulting from transverse loads applied to the bearing surfaces; and, the orientation of the rail and the conductors within the outer jacket operative to limit conductor or conductor jacket deformations resulting from transverse loads applied to the bearing surfaces.