New 8-shaped combination cable

Abstract

The invention discloses a new 8-shaped combination cable used for transmitting the communication signal of TD-SCDMA base station to a launch tower top, comprising an optical cable, a electric power cable and a woven cable which are coated in an outer sheath with the section being 8-shaped; the optical cable and the electric power cable are coated in a first sheath unit of the outer sheath; the woven cable is coated in a second sheath unit of the outer sheath; the first sheath unit and the second sheath unit are all in a shape of round tube and form the outer sheath with the 8-shaped section asa whole; the electric power cable connection is positioned on the power port of photoelectric conversion device of the launch tower top, and the optical cable connects the signal input end of the photoelectric conversion device. The new eight-shaped combination cable of the invention transmits by adopting the optical cable. The optical cable has small transmission loss, light product weight, lowcost and convenient and flexible use, enables the distance between antennae and a machine room to be farther, and is beneficial for the construction of distributed base station.

Description

technical field [0001] The invention relates to a communication cable, in particular to a new "8"-shaped composite cable used in a TD-SCDMA standard base station system, which can simultaneously transmit radio frequency signals, GPS signals and power signals. Background technique [0002] In the TD-SCDMA standard base station system, smart antennas are required for signal coverage. The number of main feeders used by smart antennas in each sector is 9, and the total number of main feeders used in the three sectors is 27. Compared with traditional The number of feeders used by GSM base stations has greatly increased. This leads to an increase in the construction cost of the base station, and at the same time makes the construction more difficult. [0003] At the same time, because the frequency of the TD-SCDMA standard is higher than that of the GSM standard, the signal coverage area of ​​the TD-SCDMA standard base station is reduced. In the same range, in order to meet the s...

AI Technical Summary

Problems solved by technology

This leads to an increase in the construction cost of the base station, and at the same time makes the construction more difficult

[0003] At the same time, because the frequency of the TD-SCDMA standard is higher than that of the GSM standard, the signal coverage area of ​​the TD-SCDMA standard base station is reduced. In the same range, in order to meet the same signal coverage requirements, the TD-SCDMA standard base station construction The number will increase substantially

[0004] Because the base station generates radiation, it will have a certain impact on human health. Therefore, in places where base stations are built, radiation often affects the production and life of nearby residents. Selecting a base station site becomes a difficult problem for operators.

[0005] At present, in the base station system of the TD-SCDMA standard, the signal transmission still adopts the feeder transmission method, which requires 27 main feeder lines and 1 GPS feeder line. The base station occupies a large area, the base station density is high, the engineering construction is difficult, and the cost of the base station is high.

[0006] Due to the constraints of coaxial cable transmission technology and the influence of GSM base station construction technology, the above-mentioned shortcomings of using traditional physical foam insulated coaxial cables for signal transmission have not been effectively resolved so far, which has become a major technical problem restricting the development of the industry

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