Leakage coaxial optical cable with internal and external conductor and producing method thereof

Abstract

The leakage coaxial optical cable with new type inside, outside conductor and its fabrication method, conductor in the optical cable using the plastic empty tube which has reinforcing steel wire on the both side as machinery intensity sustainer, the two reinforce steel wire and the centre of the plastic empty tube are in the same flat surface, it may not only reinforces the tensile strength of the cable, but also assure that the leak cable not torsion in the process of lay down. The outside of the plastic empty tube packs with copper plastic compound belt, forms the inside conductor of the leakage coaxial, it can economize large amount of copper. There is multiple fiber optical fiber beam tube in the empty tube, it can form good mass light-electricity change vehicle-ground communication system. There is physical foaming insulating barrier outside the inner conductor. Parceling the copper belt with radiation slot longitudinally on the insulating barrier, forms the out conductor of the leakage coaxial, the out conductor and the out protect layer forms the leakage coaxial optical cable. The new type inside, outside conductor leakage coaxial optical cable has many merits that the tensile strength is good, it economizes copper , the weight is light, do not turn back when laying down, the coupling function is stable and reliable, it is light-electricity change vehicle-ground communication system, the economic effect is notable.

Description

technical field [0001] The invention relates to the technical field of rail transit vehicle-to-ground communication, in particular to a leaky coaxial optical cable with new inner and outer conductors and a manufacturing method thereof applied in high-speed railway vehicle-to-ground communication. Background technique [0002] At present, there are two kinds of inner conductors of leaky coaxial cables used in rail transit vehicle-to-ground communication. One is metal copper tubes, which need to consume hundreds of kilograms of high-purity electrolytic copper. Due to the increasing scarcity of copper resources, the price of copper has increased several times in the past two years, so the inner conductor made of copper tubes is expensive and must be improved. Another kind of inner conductor is composed of copper-clad aluminum wire. Its tensile strength is low, and it is easy to stretch and deform during construction, which makes the characteristics of the entire leaky coaxial l...

AI Technical Summary

Problems solved by technology

One is metal copper tubes, which need to consume hundreds of kilograms of high-purity electrolytic copper. Due to the increasingly scarce copper resources, the price of copper has increased several times in the past two years, so the inner conductor made of copper tubes is expensive and must be improved.

Another kind of inner conductor is composed of copper-clad aluminum wire. Its tensile strength is low, and it is easy to stretch and deform during construction, which makes the characteristics of the entire leaky coaxial line worse. The leaky coaxial line with the above two inner conductors is in the It is easy to reverse during the construction process, so that the radiation trough of the leaky coaxial line is not in a straight line, causing large fluctuations in the coupling loss between the leaky coaxial line and the locomotive antenna, and greatly increasing the bit error rate of the vehicle-ground communication

In addition, neither of these two kinds of leaky coaxes can be made into a comprehensive optical cable containing optical fiber bundles, and it is impossible to make optical fiber transmission and leaky cable radiation transmission organically form a highly stable vehicle-to-ground communication system

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