Symmetric four-pair cable of category 6a with five special optical modules. RU patent 2504034.

IPC classes for russian patent Symmetric four-pair cable of category 6a with five special optical modules. RU patent 2504034. (RU 2504034):

H01B11/02 - Cables with twisted pairs or quads (transposing, crossing, or twisting at joints H04B; balancing of earth capacitance H04B)

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FIELD: electricity.

SUBSTANCE: symmetrical four-pair cable of category 6A with five special optical modules comprises strands in polymer insulation, twisted into pairs, with an external polymer shell, a breaking insulating cord, and each symmetrical pair is separated from the adjacent symmetrical pair by a special module with optic fibres, as a result of which a lay is created from four special modules with optical fibres and four symmetrical pairs separated from each other by special modules with optical fibres and twisted around the special module with optical fibres. Each special optical module comprises two fibres placed into a cavity of the polymer element of round shape in the form of an eight, in each largest part of the eight there are dielectric power elements.

EFFECT: reduced mutual effect between pairs with preservation of its flexibility.

1 dwg

The invention relates to the electrical engineering and may be used in the construction of symmetric and optical communication cables for public networks and structured cable systems.

Known design balanced cable containing copper grounds in dielectric isolation, curled into a common core, and each pair is twisted with a step that is different from the steps of twisting other pairs, the total polymer shell (UTP)(in the book A.B. Semenov, S. Kaliev , I.R. Suncheley Structured cable systems. Publishing house DMK, M, 2002, 4th edition, .109 figure 3.4 and 3.5). The disadvantage of this design is considerable restriction on transitional in the range above 250 MHz on the length of 100 meters.

Known construction of the optical cable type: six modules with optical fibers around a Central power unit with external polymer containment (in the book .. Portnov «Principles of constructing the primary networks and optical cable communication lines», Hot line-Telecom, M., 2009, .236 .6.8.). The disadvantage of this design is the presence of a Central power element restricting the possibility of optical cable in the conditions of various temperatures and mechanical effects.

Known symmetric design category 6 cable for the range of up to 250 MHz (the prospectus of the company Teldor 2006, P.23). The cable consists of 4 pairs of twisted with different step around the cross-shaped profile. Increase the distance between the pairs and, hence, increase of the values of transient attenuation between couples is achieved by integrating the design of the cross-shaped polymer profile.

Lack of construction: x-dielectric profile and its dimensions provide improved performance transmission, in particular, mutual influence between pairs up to a certain limit and the further change of the cross-shaped profile does not improve the transmission characteristics and influence.

The closest is essentially a technical design of the symmetric cable described in the prospectus of the company Teldor, Wires and Cables, Russia Ltd. 2002, 223 p, p.23) cable category 6 (250 MHz)unshielded (UTP).

The cable contains conductor diameter 0,575 mm insulated from polyolefin with the external core diameter 1,0 mm Four pairs of twisted around a Central cross-shaped profile, the external diameter of the cable 6.7 mm, the thickness of the outer shell of 0.7 mm, wall thickness between pairs of 0.7 mm, the diameter of the cable core 5.3 mm, a tearing the outer shell .

The disadvantage of this design is the need to increase the distance between the pairs by increasing the thickness and size of the cross-shaped profile to reduce the mutual influence between pairs and improve transfer characteristics and mechanical characteristics of the cable. However, the possibility of using such decisions are very limited, due to the feasibility and the real solution on the thickness of the elements of the cross.

Task implementation of which was given a technical solution is to create such design symmetric cable, which reduces the mutual influence between pairs at the expense of their mutual arrangement and mechanical characteristics of the cable while maintaining its flexibility by introducing special modules with optical fibres between each pair and the Central optic module.

To solve the problem in symmetric cable containing veins in polymeric insulation, twisted in pairs, with external polymer sheath, each symmetric pair separated by a symmetric pair a special module with optical fibers, resulting in a of modules with optical fibres and four symmetric pairs, separated by special modules for optical fiber and twisted around a special module with optical fibers each special optical module contains two fibers, placed into the cavity of the polymer element round shape in the form of eight, each greatest part of the group of eight are dielectric power elements.

Figure 1 shows the design of the symmetric cable. It contains conductor 1 in polymeric insulation - 2 twisted pairs - 3, optical fiber - 4,a special fiber optic module - 5, dielectric strength member - 6, which breaks the outer shell - 7, foreign polymeric enclosure cable - 8, a projection on the outer surface of the outer shell, which indicates where inside the cable - 9.

In this design by mutual arrangement pairs balanced cable, the introduction of optical fibers in special optical modules with dielectric strength elements in each module between each of the symmetric pair and Central special optical module is significantly reduced, the mutual influence between symmetric pairs by increasing the distance between them and additionally in this increased distance introduced optical fibers in the specific modules, which in addition to its core functions perform auxiliary functions Department of symmetric pairs from each other and even distribution of the mechanical load on the whole cross section of the cable due to the presence of dielectric strength elements in each special optical module. Despite the fact that the material consumption of the cable increases by approximately 25%, the mutual influence between pairs is also reduced by 25% in the frequency range up to 300 MHz.

Symmetric category 6A cable with five special optical modules, containing veins in polymeric insulation, twisted in pairs, with external polymer shell pierced , wherein each symmetric pair separated by a symmetric pair a special module with optical fibers, resulting in a of the four special modules with optical fibres and four symmetric pairs, separated by special modules for optical fiber and twisted around a special module with optical fibers, each special optical module contains two fibers, placed into the cavity of the polymer element of the round form, in the form of eight, each greatest part of the group of eight are dielectric power elements.