High-temperature-resistant low-loss compound insulation coaxial cable

Abstract

Provided is a high-temperature-resistant low-loss compound insulation coaxial cable. The high-temperature-resistant low-loss compound insulation coaxial cable is characterized in that a solid or stranded inner metal conductor (1), a polytetrafluoroethylene micropore compound insulation layer (2), an outer conductor (3) and a sheath layer (4) are arranged from inside to outside in sequence, the solid or stranded inner metal conductor (1) longitudinally extends along the central axis of the cable, the outer conductor (3) is formed by knitting metal or is additionally provided with an inner shielding layer, the sheath layer (4) is made of FEP copolymer or low-smoke halogen-free flame retardant polyolefin, and the inner metal conductor (1) and the outer conductor (3) are separated by the polytetrafluoroethylene micropore compound insulation layer (2); the polytetrafluoroethylene micropore compound insulation layer (2) is made of modified polytetrafluoroethylene organic-inorganic nanocomposites filled with nano polyhedral oligomeric silsesquioxanes (POSS). According to the coaxial cable, the dielectric constant of the insulation layer of the cable is reduced. A traditional solid polytetrafluoroethylene insulation dielectric constant is reduced to 1.2-1.6 from 2.1 and is reduced by about 24 percent to 43 percent, and the signal attenuation of cable high-frequency communication is reduced.

Description

technical field [0001] The invention belongs to communication cable products in the field of communication transmission, in particular to a high-temperature-resistant and low-loss composite insulated coaxial cable with a polytetrafluoroethylene composite microporous insulation structure filled and modified by nanoparticle POSS. The cable can be widely used in information transmission of high-frequency communication equipment in communication radar, computer room, aerospace, mine oil well, antenna, ship and other industries that require high temperature resistance and low loss. Background technique [0002] Radio frequency cable is a general term for cables that transmit electrical signals and energy in the radio frequency range, of which coaxial cables are the most widely used. Coaxial cables are mainly used as antenna feeders for radio transmitting and receiving equipment, as well as internal wiring and interconnection wiring for various communications and electronic equipm...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-temperature-resistant low-loss composite insulated coaxial cable, which is modified by physical blending and filling by introducing ultra-low dielectric nanoporous cage-type silsesquioxane (POSS) into the polytetrafluoroethylene insulating material. A revolutionary method to reduce the dielectric constant of the cable insulation layer, increase the porosity of the cable insulation layer, to improve the mechanical properties of the cable insulation layer, creep resistance, processing difficulties, etc., simplify the process difficulty, improve production efficiency, and improve products pass rate, increase the overall performance of the cable

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