KR20140027693A - Data cable for high speed communication except for cross-filler - Google Patents

Abstract

The present invention relates to a data cable for high-speed communication and, more specifically, to a data cable for high-speed communication capable of reducing volume and weight of a cable by omitting a cross filler while maintaining performance. According to the present invention, the data cable for high-speed communication in which a cross filler is omitted is in Cat.6 or Cat.6A according to signal transmission performance and includes: four combined pairs in which a pair of conductive wires are twisted with certain pitch to form combined pitch; and a jacket which surrounds the four combined pairs. The combined pitches of the four combined pairs are different from each other. The combined pitch of the first combined pair is 7.9±0.5mm. The combined pitch of the second combined pair is 9.7±0.5mm. The combined pitch of the third combined pair is 8.9±0.5mm. The combined pitch of the fourth combined pair is10.4±0.5mm.

Description

DATA CABLE FOR HIGH SPEED COMMUNICATION EXCEPT FOR CROSS-FILLER}

The present invention relates to a data cable for high-speed communication, and more particularly, to a data cable for high-speed communication that can reduce the volume and load of the cable by excluding the cross filler and maintain its performance.

Communication cable is a kind of cable that can transmit signals requiring high specifications such as audio and video.The data cable is classified into categories (Category or Cat.) According to signal transmission capability. Grade 6 is widely used.

Recently, the communication cable has been extended to the frequency band of 500MHz or more and attempts to use the high frequency band to transmit from 100Mbps or 1Gbps to 10Gbps based on the transmission capacity. In this case, external interference between the cables is known as the biggest problem. Therefore, the development of products to suppress such external interference is actively progressing.

In addition, the communication cable may be divided into a shielded cable such as FTP (Foiled Twisted Pair) or STP (Shieled Twisted Pair) and an unshielded cable such as UTP (Unshieled Twisted Pair).

Shielded cables are technically superior because they do not cause extraneous interference due to electromagnetic waves when high frequency transmission is performed in the range of 500 ~ 650MHz, but their characteristics are largely changed according to technician's installation technology due to the low tolerance and the whole system is insignificant. Due to the problem of deterioration of the characteristics of the UTP unshielded cable is mainly used.

Therefore, the UTP cable is structurally deformed and developed to suppress internal and external interference, and internal interference forms a separator (or cross-pillar) to separate the associated pairs and external interference. Communication cables having various types of structures for forming partitions or spacers on the inner and outer circumferential surfaces of the jacket have been manufactured and used.

However, according to the formation of the separator (cross-filler) or spacer additionally formed for internal and external interference, the manufacturing process has to be complicated, which leads to a problem in that the productivity efficiency is lowered, and the outer diameter of the cable is increased and the load is increased. The problem of getting bigger is kept as it is.

The present invention has been made to solve the above-mentioned problems, by excluding the cross filler used in the conventional CAT.6 (CAT. 6A) grade UTP cable, reducing the size of the outer diameter of the cable and consequently reduce the cost To provide a CAT.6 high speed data cable with improved savings.

In addition, it is to provide a data cable for CAT.6 (CAT.6A) high-speed communication that is equivalent to the performance of the conventional cable while reducing cost by eliminating the cross filler.

In addition, by providing a design change of the joint pitch of the paired pairs, it provides a CAT.6 (CAT.6A) high-speed data cable for minimizing the pitch fluctuation during bending and preventing degradation of cable performance and quality such as crosstalk and impedance. I would like to.

The data cable for high-speed communication except for the cross-pillar according to the present invention for solving the above problems is applied to Cat. (Category) 6 or Cat.6A grade according to the signal transmission capability, and a pair of insulated coating Four union pairs twisted at a pitch of and forming a combined pitch, and a jacket surrounding the four twisted pair pairs; The pitch is 7.9 ± 0.5mm, the combined pitch of the second associated pair is 9.7 ± 0.5mm, the combined pitch of the third associated pair is 8.9 ± 0.5mm, and the associated pitch of the fourth associated pair is 10.4 ± 0.5mm. Is implemented.

Here, it is preferable that the conductor diameter of the four associated pair wires is in the range of 0.53 ± 0.01 mm, the insulation outer diameter is 0.95 ± 0.3 mm, the aggregate pitch is 110 to 120 mm.

In addition, the data cable for high-speed communication, except for the cross-pillar according to the present invention is applied to Cat. Four associated pairs forming a combined pitch and a jacket surrounding the four stranded pairs, and formed by excluding a cross filler separating the four associated pairs, each of the four associated pairs It is formed of 7.9mm, 9.7mm, 8.9mm, 10.4mm, the conductor diameter of the four paired pair wires can be implemented to have a range of 0.53mm, insulation outer diameter 0.95mm, aggregate pitch 110 to 120mm.

Here, the outer diameter of the data cable for high-speed communication is formed of 5.4mm to reduce the outer diameter of the existing data cable than 6.1mm can improve the quality by reducing the cost and ease of installation.

According to the configuration of the present invention described above, by excluding the cross filler used in the conventional CAT.6 (CAT.6A) grade UTP cable, reducing the size of the outer diameter of the cable and reducing the load, resulting in improved cost saving effect On the one hand, it can be equally matched to the electrical performance of the conventional cable, and the design of the associated pitch of the associated pairs can be changed to prevent the degradation of cable performance and quality such as minimizing the pitch fluctuation, crosstalk and impedance during bending. A data cable for CAT.6 high speed communication can be provided.

1 is a cross-sectional view of a data cable for high speed communication excluding the cross filler according to the present invention.
2 is a perspective view of a data cable for high speed communication excluding the cross filler according to the present invention.
3 is a graph showing near-end crosstalk characteristics of a data cable for high speed communication according to an exemplary embodiment of the present invention.
4 is a graph showing far-end crosstalk characteristics of a data cable for high speed communication according to an exemplary embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described the structure of the data cable for high-speed communication, except for the cross-filler according to the present invention, its manufacturing method and its effect.

1 is a cross-sectional view of a data cable for high speed communication excluding the cross filler according to the present invention.

As shown in FIG. 1, the data cable for high speed communication except for the crossfiller according to the present invention includes an association pair 11 and a jacket 12.

The association pair 11 has a pair of insulated coated conductors 11a and 11b, and two pairs of conductive conductors 11a and 11b are twisted together.

The conducting wires 11a and 11b of the association pair 11 are twisted to a predetermined range of pitches, and the pitches of each of the four stranded pairs 11 are twisted to different pitches to suppress signal interference from each other. Is manufactured.

The plurality of combined pairs 11 twisted wires are produced in different pitch conditions because crosstalk between pairs in the cable is easily generated when the internal pitch conditions are the same or similar.

The jacket 12 may be made of polyethylene, PVC, or an olefin (Olefin) -based polymer material, etc., and has a jacket shape surrounding a plurality of twisted pair pairs 11.

2 is a cross-sectional view of a data cable for high speed communication excluding the cross filler according to the present invention.

As shown in FIG. 2, the data cable for high speed communication of the present invention has a structure without a cross filler, cross or straight separator, which has been used to prevent internal interference between the conventional association pairs 11.

The reason for using a cross filler or a separator (or a partition) is to improve the quality of a transmission signal by preventing crosstalk of electromagnetic signals generated between associated pairs.

However, due to the use of cross fillers, the total outer diameter of the data cable is inevitably increased, which causes a cost increase and increases the difficulty of laying due to an increase in the cable volume.

Accordingly, the data cable of the present invention provides a data cable that can reduce cost and reduce signal quality without sacrificing internal and external interference, that is, signal crosstalk, which is inferior to the performance of conventional data cables.

As a configuration to solve this problem, first, the cross filler inserted into the cable is removed to reduce the outer diameter of the data cable by about 10%.

In addition, by eliminating the cross-pillar to improve the crosstalk characteristics generated during high-speed data transmission by adjusting the pitch of the association pairs 11 to adjust the overall impedance is designed to satisfy the near-end cross-talk and far-end crosstalk characteristics to the standard value.

When a signal is sent to any one association pair, interference caused by nearby association pairs is a phenomenon that a signal that was not originally intended to occur at another association pair is called crosstalk.

Crosstalk is divided into Near End Crosstalk (NEXT) and Attenuation to Crosstalk Ratio Far End (ACRF).

Near-end crosstalk refers to interference and induced phenomena at the sending end of a signal, and far-end crosstalk refers to interference and induced phenomena at the means of receiving a signal.

In general, near-end crosstalk characteristics are restricted in Category 5 cable in data cable, and in near-end crosstalk characteristic as well as near-end crosstalk characteristics are regulated in Category 6 and 6A cable because of high-speed data communication.

The cause of crosstalk is due to crosstalk due to electrostatic coupling between one association pair (induction line) and adjacent association pair (induction line) and crosstalk by electronic coupling.

Where ω = 2πf, Z1 is the characteristic impedance of the inductive circuit, Z2 is the characteristic impedance of the inductive circuit, M is the sum of mutual inductance by electromagnetic coupling, and K is the sum of capacitance by electrostatic coupling.

As can be seen from [Equation 1] and [Equation 2], as the frequency of use increases, the amount of crosstalk increases, and the amount of crosstalk due to electrostatic coupling is proportional to the characteristic impedance of the inductive line, and the amount of crosstalk due to electromagnetic coupling is Inversely proportional to characteristic impedance.

In addition, the near-end crosstalk and far-end crosstalk are proportional to the characteristic impedance of the induced circuit and the characteristic impedance of the induced circuit, and the increase in impedance generated in the line of each federation pair increases the near-end crosstalk and the far-end crosstalk.

The impedance of the data cable can be increased or decreased by a number of factors, but important factors are influenced by the diameter of the conductor, the outer diameter of the conductor, the associated pitch (p) and the aggregate pitch (P).

In addition, in the relationship between the outer diameter of the conductor and the conductor, the impedance is proportional to the outer diameter of the conductor and is proportional to the combined pitch (p) and the collective pitch (P).

By utilizing these characteristics, the data cable of the present invention reduces the overall outer diameter while maintaining the outer diameter of the conductor and the outer diameter of the conductor of the conventional data cable.

That is, as shown in FIG. 2, the outer diameters (including the outer diameters of the conductors) of the conductive wires 11a and 11b are kept the same as before, and the cross-filler or the separator is excluded, so that the total diameter D is about 10% compared with the conventional one. Will be reduced. That is, the conventional high speed communication data cable has an outer diameter of approximately 6.1 mm due to the cross filler, and the outer diameter of the high speed communication data cable of the present invention is reduced to approximately 5.4 mm.

Instead, the improvement of crosstalk characteristics, which can be lost, will be improved by controlling the combined pitch in the correlation between impedance, conductor, conductor diameter, and joint pitch.

The data cable for high-speed communication of the present invention is to adjust the associated pitch (p1 to p4) of each association pair 11 to improve near-end crosstalk and far-end crosstalk characteristics, the combined pitch is reduced by 30 to 35% compared to the conventional Let's go.

Communication data cables are particularly sensitive to aging characteristics in flexure, which results from the deformation of the pitch due to structural changes in the associated pairs.

Therefore, in order to minimize this effect, most communication data cables are manufactured at different pitches in the range of 9 to 20 mm.

Accordingly, the communication data cable of the present invention has a design value reduced by about 30 to 35% compared to the conventional one.

More specifically, the combined pitch of the first pair 21 is 7.9 ± 0.5 mm, the combined pitch of the second pair 22 is 9.7 ± 0.5 mm, and the third pair 23 associated pitch is 8.9 ± 0.5 mm, the fourth pair. (24) The combined pitch is to be designed to have 10.4 ± 0.5mm.

Here, the conductor diameters of the conductive wires 11a and 11b of the association pair 11 are in the range of 0.53 ± 0.01mm, the insulation outer diameter is 0.95 ± 0.3mm, and the aggregate pitch is 110 to 120mm, which is almost the same as the conventional standard value. .

If the pitch of the coupling pair is dense, the change rate of the structure can be minimized under external influence.However, if the pitch is densified more than 35% compared to the existing, the penetration rate increases, which may cause conductor resistance and transmission loss. There is a problem of a price increase due to the increase in volume due to the increase in the amount of admittance, and if the pitch is adjusted to less than 30%, the characteristics of near-end crosstalk and far-end crosstalk are deteriorated according to the increase of impedance, resulting in signal transmission quality problems.

The crosstalk characteristic of the optimally designed high speed data cable will be described with reference to FIGS. 3 and 4.

3 is a graph showing near-end crosstalk characteristics of a data cable for high speed communication according to a preferred embodiment of the present invention, and FIG. 4 is a graph showing far-end crosstalk characteristics of a data cable for high speed communication according to a preferred embodiment of the present invention.

The graphs shown in Figs. 3 and 4 show the results measured with a measuring instrument, and near-end crosstalk and far-end crosstalk measurements up to a frequency band of ~ 250 MHz by the international specification (TIA / EIA-568B.2-1) for Category 6 grades. It is shown.

The measured sample is 7.9 ± 0.5mm for the first pair 21, 9.7 ± 0.5mm for the second pair 22, and 8.9 for the third pair 23 with the above-mentioned combined pitch reduced to 30 to 35%. ± 0.5mm, the fourth pair 24 has a range of 10.4 ± 0.5mm, conductor diameter of 0.53 ± 0.01mm, insulation outer diameter of 0.95 ± 0.3mm, and aggregate pitch of 110 to 120mm.

Referring to Fig. 3, the portion drawn by the solid line in the graph is the standard limit value 31, and the transmission characteristic value 32 should not exceed this standard limit value 31 due to transmission signal interference.

With two federation pairs as one, one federation pair is an induced circuit and the other federated pair is tested as an induction circuit. For example, 12-36 in the box 33 at the top of the graph is connected to the first conductor. Combined pairs of wire 2, wire 3 and wire 6 of twisted pair (in accordance with this standard) are used as guided and guided lines.

It is confirmed that the transmission characteristic values 32 of the association pairs formed in this way have a sufficient margin (Margin) from the standard limit value 31, which means that the high-speed communication data cable of the present invention has a margin margin of at least 10 dB for the near-end crosstalk characteristic. It can be confirmed that it can be used as a data cable for high-speed communication that can transmit more than 10Gbps.

Referring to Fig. 4, the portion drawn by the solid line in the graph is the standard limit value 41, and the experimental value shown thereon is the far-end crosstalk transmission characteristic value 42 due to transmission signal interference.

With two federation pairs as one, one federation pair is tested as an induction circuit and the other as a guided circuit, and it is tested under the same cable specification as the near-end crosstalk characteristic of FIG.

It is confirmed that the far-end crosstalk transmission characteristic value 42 of the association pairs has a sufficient margin (Margin) from the standard limit 41. This means that the high-speed communication data cable of the present invention has a margin margin of at least 5 dB with respect to the near-end crosstalk characteristic. It can be confirmed that it can be used as a data cable for high-speed communication capable of transmitting more than 10Gbps.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, As will be understood by those skilled in the art. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

11: Union pair 11a, 11b: Lead wire
12: jacket 21: the first union pair
22: 2nd Union Fair 23: 3rd Union Fair
24: 4th Union Fair 31, 41: Standard Limit
32, 42: Transmission characteristic values 33, 43: Top box of the graph

Claims (4)

Applies to Cat.6 or Cat.6A class according to signal transmission capability.
A pair of insulated coated wires are twisted to a predetermined pitch to form four union pairs and a jacket surrounding the four stranded pairs,
The associated pitches of each of the four association pairs are different from each other in pitch,
The combined pitch of the first federation pair is 7.9 ± 0.5mm, the combined pitch of the second federated pair is 9.7 ± 0.5mm, the combined pitch of the third federated pair is 8.9 ± 0.5mm and the combined pitch of the fourth federated pair is 10.4 ± 0.5 Data cable for high speed communication, excluding cross filler, having mm. The method of claim 1,
The four allied pair conductors have a conductor diameter of 0.53 ± 0.01mm, an insulation outer diameter of 0.95 ± 0.3mm, and an aggregate pitch of 110 to 120mm. Applies to Cat.6 or Cat.6A class according to signal transmission capability.
A pair of insulated coated wires are twisted to a predetermined pitch to form four union pairs and a jacket surrounding the four stranded pairs,
Formed by excluding the cross-pillar separating the four associated pairs, respectively,
The combined pitch of each of the four associated pairs is formed of 7.9mm, 9.7mm, 8.9mm, 10.4mm,
The conductor wire diameter of the four associated pair wires has a range of 0.53 mm, an insulation outer diameter of 0.95 mm, and an aggregate pitch of 110 to 120 mm. The method according to claim 1 or 3,
The outer diameter of the high-speed communication data cable is formed of 5.4mm, high-speed communication data cable excluding the cross filler.

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