摘要:
A geometrically-structured coaxial cable may prevent infiltration of water vapor and other contaminants by using a closed cell structure. The cable may be fabricated by wrapping bubble tape around its central conductor. Alternatively, plastic may be extruded through channels to create a plurality of layers. In either case, these layers are staggered in a zig-zag pattern to ensure that no radial spokes connect the inner and outer conductors of the coaxial cable without passing through a plurality of dielectric layers.
摘要:
A geometrically-structured coaxial cable may prevent infiltration of water vapor and other contaminants by using a closed cell structure. The cable may be fabricated by wrapping bubble tape around its central conductor. Alternatively, plastic may be extruded through channels to create a plurality of layers. In either case, these layers are staggered in a zig-zag pattern to ensure that no radial spokes connect the inner and outer conductors of the coaxial cable without passing through a plurality of dielectric layers.
摘要:
A hybrid cable for telecommunications systems is disclosed. The hybrid cable may include a plurality of fiber-optic cables and power cables extending within an armor member and an outer jacket in a main body portion of the hybrid cable, and extending outside of the armor member and the outer jacket in a termination portion of the hybrid cable. Shielded tube assemblies may be attached to the power cables in the termination portion to provide electrical shielding to the power cables in the termination portion of the hybrid cable. The shielded tube assemblies may be attached to the armor member to electrically ground the shielded tube assemblies. A method of constructing a hybrid cable is also disclosed.
摘要:
A tool for stripping off a jacket from tubes or cables is characterized by a bend adapted to an outer diameter of the duct or cable to be stripped, and a blade protruding from the bend to the interior of the bend. The invention provides a cost-effective, accurate and easily producible tool for stripping off a jacket from tubes or cables.
摘要:
A hybrid cable for telecommunications systems is disclosed. The hybrid cable may include a plurality of fiber-optic cables and power cables extending within an armor member and an outer jacket in a main body portion of the hybrid cable, and extending outside of the armor member and the outer jacket in a termination portion of the hybrid cable. Shielded tube assemblies may be attached to the power cables in the termination portion to provide electrical shielding to the power cables in the termination portion of the hybrid cable. The shielded tube assemblies may be attached to the armor member to electrically ground the shielded tube assemblies. A method of constructing a hybrid cable is also disclosed.
摘要:
A process for manufacturing structures for guiding electromagnetic waves, such as telecommunication cables, comprising a least a conductive layer for transmission of radio frequency waves, said conductive layer being formed by means of cold gas spraying techniques. An apparatus for manufacturing structures for guiding electromagnetic waves and a cable manufactured according to such process.
摘要:
A radiating coaxial high-frequency cable is provided with openings in the outer conductor which are in the form of slots (5) arranged substantially perpendicular to the cable axis. The slots (5) are arranged in sections which are arranged consecutively without gaps in the longitudinal direction of the cable and whose axial length is dimensioned according to the high-frequency energy to be transmitted. The number of slots (5) is greater in the sections which are farther away from the feed location of the high-frequency energy than in the sections which are closer to the feed location. When the length of the cable is increased, several sections (A) with an identical number of slots are arranged consecutively without gaps, provided that subsequent sections (A) have a larger effectual opening when the system damping between the high-frequency cable and an antenna located outside the cable reaches a predetermined value.
摘要:
A Radio-Frequency (RF) waveguide comprising at least a folded sheet (3) is described, wherein the sheet comprises a first layer made of a plastic, and at least a second layer made of a electric conductive material. Furthermore a method for manufacturing such a RF waveguide plus a device to perform said method is described.
摘要:
The present invention relates to a bi-material radio frequency transmission line of cylindrical shape comprising a thin layer of highly conductive material supported by a base material wherein both materials are selected in function of the frequency of the transmitted signal and wherein the thickness of the thin layer is in a range from 1.2 to 2.4 times the depth of the skin effect at the frequency corresponding to the transmitted signal.
摘要:
A Radio-Frequency (RF) waveguide comprising at least a folded sheet (3) is described, wherein the sheet comprises a first layer made of a plastic, and at least a second layer made of a electric conductive material. Furthermore a method for manufacturing such a RF waveguide plus a device to perform said method is described.