Flat dual self-supporting lightning surge-preventing mini coaxial compound cable for satellite television

Abstract

The invention provides a flat dual self-supporting lightning surge-preventing mini coaxial compound cable for satellite television. The mini coaxial compound cable comprises a cable core and a cable core sheath; dual self-supporting ground wires and a coaxial cable are mounted in the cable wire; the two ground wires are symmetrically arranged on the two sides of the coaxial cable; the coaxial cable comprises an inner conductor, an insulating layer, an aluminum foil shielding layer and a braided shielding layer, all of which are orderly arranged in the radial direction from inside to outside; the cable core sheath is of a flat structure. According to the flat dual self-supporting lightning surge-preventing mini coaxial compound cable for satellite television, the self-supporting ground wires are made of high-performance copper-clad steel having the tensile strength of greater than 800Mpa and the ductility of greater than 5%, and therefore, the cable is enabled to have excellent resistance to bending and wind induced oscillation resistance. The properties of the cable can be protected against damage caused by swaying under wind force as the cable is placed outdoors for a long time; the dual self-supporting ground wires are adopted and symmetrically distributed on both sides of the coaxial cable, and consequently, the whole cable has excellent balanced capacitance to the ground; the influence of strong electromagnetic interference such as lightning surge can be effectively prevented, and therefore, the mini coaxial compound cable has an excellent electromagnetic shielding property.

Description

(1) Technical field [0001] The invention relates to a flat double self-supporting anti-lightning surge satellite TV mini-coaxial composite cable. (2) Background technology [0002] At present, in satellite TV systems at home and abroad, the outdoor satellite antenna is generally connected to the indoor TV terminal by using a cylindrical RG6 series physical foaming coaxial cable. The coaxial cable structure is copper wire or copper-clad steel conductor + physical foaming insulation +Aluminum-plastic composite shielding+braided shielding+PVC sheath. The application of this coaxial cable in the satellite TV antenna system has the following disadvantages: long-term influence by the weight of the wire and wind pull, the structure is easily deformed, and the transmission performance is easily damaged; the signal transmission is easily affected by lightning strong current and outdoor electromagnetic radiation interference ;Frequent bending will damage the fragile physical foam ins...

AI Technical Summary

Problems solved by technology

The application of this kind of coaxial cable in the satellite TV antenna system has the following shortcomings: long-term influence by the weight of the wire and wind pull, the structure is easily deformed, and the transmission performance is easily damaged; the signal transmission is easily affected by strong lightning current and outdoor electromagnetic radiation interference ;Frequent bending will damage the fragile physical foam insulation layer, thereby affecting the transmission performance of the wire; exposed to outdoor parts, long-term rain erosion and sunlight exposure, greatly reducing the service life; due to the large outer diameter of the RG6 coaxial cable, from From outdoor to indoor, it is necessary to penetrate walls or doors and windows, which is inconvenient for construction; if using open wire wiring, it is not beautiful and easy to be damaged; if using hidden wiring, it will cause damage to the wall and is not easy to maintain

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