KR100989323B1 - Unshielded twisted pair cable - Google Patents

Abstract

The present invention relates to a UTP cable, wherein the two insulation coated wires are twisted in a spiral shape to have a large pitch (p), and the first, second, third, and fourth twisted pairs sequentially provided in a clockwise or counterclockwise direction. Wealth; A separator for separating the first, second, third and fourth twisted pairs from each other; An aggregated stranded portion including the first, second, third, and fourth stranded portions and a separator, the collective stranded portion being twisted in a spiral to have an aggregated pitch (P); In the UTP cable comprising a sheath surrounding the collective twisted portion, the aggregate pitch is provided to have a range of 40 mm (mm) or more and 200 millimeters (mm) or less, the large pitch of the first twisted pair is 11.71 (± 0.3 ), The major pitch of the second twisted pair is 10.34 (± 0.3) millimeters (mm), the major pitch of the third twisted pair is 8.63 (± 0.3) millimeters (mm), and the fourth twisted pair Large pitch is characterized in that the 9.45 (± 0.3) millimeter (mm) is provided.

As a result, it is possible to construct a UTP cable with optimized large pitch and collective pitch conditions to minimize electromagnetic interaction between the twisted pairs.

UTP, cable, pitch

Description

UTP cable {UNSHIELDED TWISTED PAIR CABLE}

The present invention relates to a UTP (Unshielded Twisted Pair) cable, and more particularly, to a UTP cable having a structure capable of preventing crosstalk between twisted pairs to improve transmission characteristics.

Recently, with the rapid development of communication technologies such as ATM and Ethernet, the importance of UTP cable is emerging.

In general, a UTP cable spirally twists a wire made of a conductor using a conductor such as copper and a sheath to insulate it, and forms a stranded wire part, and gathers about 4 stranded wire parts and spaces each stranded wire by using a separator, and then coats it again. It consists of one form.

In recent years, the UTP cable has increased as the information transmission capability is an important problem as the development of information and communication technology, and has been developed and complemented in the direction of realizing such an increase in the transmission capability.

On the other hand, according to the global convention, the UTP cable is classified by a category (Category or Cat.) And a number according to the signal transmission capability, the higher the number has a higher transmission characteristics.

For example, 16 MHz for Cat. 3, 20 MHz for Cat. 4, and 100 MHz for Cat. 5 can be transmitted. The higher the modulation frequency, the greater the amount of information per unit time.

 However, the higher the modulation frequency, the higher the noise phenomenon due to the interference between the cable and the change in the impedance inside the wire, which makes it difficult to separate the signal from the signal receiver.

For this reason, the signal transmission limit of UTP cable has been considered to be about 155Mbps (Megabit per sec).

However, according to the recent development of information transmission equipment technology, it is possible to compensate for signal degradation due to interference in a cable by using a compensation method by digital signal processing (DSP) equipment or the like. The 1000Mbps (1Gbps) transmission was made possible, and the IEEE (Institute of Electrical and Electronics Engineers) standard committee officially standardized 1000 Base-T as an Ethernet standard by 1999.

On the other hand, the recent development of related technologies, such as moving picture transmission technology, is likely to require a cable that can enable a higher level of information transmission in the near future. R & D is being conducted competitively, and a special committee for establishing standards for high-speed information transmission cables is being established in IEEE.

However, in order to increase transmission capacity, high frequency is generally used, and in case of using such high frequency, insertion loss, impedance mismatching between cable conductor and equipment, and crosstalk between wires are proportional to each other. There is a growing problem.

Representative interferences include RL (Return Loss), NEXT (Near End Crosstalk), FEXT (Far End Crosstalk), and to solve this problem, the compensation system in the transmission system itself, the twisted pitch of the wire, Attempts have been made to change the conductor diameter, the insulating outer diameter, the shape of the separator, and the like.

Looking at the patents related to the improvement of transmission characteristics of UTP cable, interference between internal wires was considered to be a major factor of transmission quality deterioration from the early stage of development, and many efforts have been made to solve this problem.

Related patents include US5,132,488, US5,969,295, US5,519,173, US5,952,615, and the contents of the present invention include placing a metal thin film inside a sheath to improve transmission characteristics related to interference, or It is proposed to suppress interference by inserting a filler.

Moreover, in recent years, the use of high frequency bands has been extended to extend the frequency to 400 MHz or higher, especially 500 to 650 MHz, to allow for 20 Gbps of theoretical capacity and 10 Gbps based on actual transmission capacity. It is constantly being tried.

In the case of using the high frequency band, the main problem is to minimize the noise inside the cable by matching the impedance value of the single wire in the cable to the value around 100 ohm which is the international standard, and matching the impedance between the cable and the equipment. It is highlighted.

On the other hand, the UTP cable has a vulnerability in which the electromagnetic field induced in each twisted pair causes an alien cross talk that has an electromagnetic effect on another adjacent twisted pair.

These alien cross talks are outlined in IEC 61156-5, Multicore and symmetrical pair / quad cables for digital communications- Part 5: Symmetrical pair / quad cables with transmission characteristics up to 600 MHz- Horizontal floor wiring- Sectional specification. The paragraph restricts the scope of the regulation and certain regulatory values.

Recently, researches on various methods for reducing the alien crosstalk have been conducted, and in particular, many efforts have been made to calculate the large pitch and collective pitch conditions of each twisted pair.

Disclosure of Invention An object of the present invention is to provide a UTP cable having a large pitch and a collective pitch condition of a twisted pair portion capable of suppressing the occurrence of alien crosstalk as devised to solve the above problems.

Another object of the present invention is to provide a UTP cable having a structure that prevents cross talk between adjacent twisted pairs.

The object is, according to the present invention, the first, second, third, fourth stranded wire that is formed so that two insulation coated wires are twisted in a spiral to have a large pitch (p), sequentially provided in a clockwise or counterclockwise direction Wealth; A separator for separating the first, second, third and fourth twisted pairs from each other; An aggregated stranded portion including the first, second, third, and fourth stranded portions and a separator, the collective stranded portion being twisted in a spiral to have an aggregated pitch (P); In the UTP cable including;

The aggregate pitch is provided to have a range of 40 mm (mm) or more and 200 mm (mm) or less.

The large pitch of the first twisted pair is 11.71 (± 0.3) millimeters (mm),

The large pitch of the second twisted pair is 10.34 (± 0.3) millimeters (mm),

The major pitch of the third twisted pair is 8.63 (± 0.3) millimeter (mm),

The large pitch of the fourth twisted pair is achieved by a UTP cable provided at 9.45 (± 0.3) millimeters (mm).

Here, a lip cord may be formed inside the sheath to easily peel off the sheath of the sheath.

On the other hand, according to the present invention, the first, second, third, and second are formed so that the insulation-covered two wires are twisted in a spiral to have a large pitch (p), sequentially provided in a clockwise or counterclockwise direction, 4 twisted pairs; A separator for separating the first, second, third and fourth twisted pairs from each other; An aggregated stranded portion including the first, second, third, and fourth stranded portions and a separator, the collective stranded portion being twisted in a spiral to have an aggregated pitch (P); In the UTP cable including;

The aggregate pitch is provided to have a range of 40 mm (mm) or more and 200 mm (mm) or less.

The large pitch of the first twisted pair is 11.71 (± 0.3) millimeters (mm),

The large pitch of the second twisted pair is 8.63 (± 0.3) millimeter (mm),

A large pitch of the third twisted pair is 10.34 (± 0.3) millimeters (mm),

The large pitch of the fourth twisted pair is also achieved by a UTP cable provided at 9.45 (± 0.3) millimeters (mm).

Here, a lip cord may be formed inside the sheath to easily peel off the sheath of the sheath.

On the other hand, according to the present invention, the first, second, third, and second are formed so that the insulation-covered two wires are twisted in a spiral to have a large pitch (p), sequentially provided in a clockwise or counterclockwise direction, 4 twisted pairs; A separator for separating the first, second, third and fourth twisted pairs from each other; An aggregated stranded portion including the first, second, third, and fourth stranded portions and a separator, the collective stranded portion being twisted in a spiral to have an aggregated pitch (P); In the UTP cable including;

The aggregate pitch is provided to have a range of 40 mm (mm) or more and 200 mm (mm) or less.

The large pitch of the first stranded portion is 12.09 (± 0.3) millimeter (mm),

The large pitch of the second twisted pair is 10.34 (± 0.3) millimeters (mm),

The major pitch of the third twisted pair is 8.63 (± 0.3) millimeter (mm),

The large pitch of the fourth twisted pair is also achieved by a UTP cable provided at 9.45 (± 0.3) millimeters (mm).

Here, a lip cord may be formed inside the sheath to easily peel off the sheath of the sheath.

On the other hand, according to the present invention, the first, second, third, and second are formed so that the insulation-covered two wires are twisted in a spiral to have a large pitch (p), sequentially provided in a clockwise or counterclockwise direction, 4 twisted pairs; A separator for separating the first, second, third and fourth twisted pairs from each other; An aggregated stranded portion including the first, second, third, and fourth stranded portions and a separator, the collective stranded portion being twisted in a spiral to have an aggregated pitch (P); In the UTP cable including;

The aggregate pitch is provided to have a range of 40 mm (mm) or more and 200 mm (mm) or less.

The large pitch of the first stranded portion is 12.09 (± 0.3) millimeter (mm),

The large pitch of the second twisted pair is 8.63 (± 0.3) millimeter (mm),

A large pitch of the third twisted pair is 10.34 (± 0.3) millimeters (mm),

The large pitch of the fourth twisted pair is also achieved by a UTP cable provided at 9.45 (± 0.3) millimeters (mm).

Here, a lip cord may be formed inside the sheath to easily peel off the sheath of the sheath.

According to the present invention, it is possible to construct a UTP cable with optimized large pitch and aggregate pitch conditions to minimize electromagnetic interaction between twisted pairs.

In addition, it is possible to configure a UTP cable having a structure that prevents cross talk between adjacent twisted pairs.

As described above, the present invention may be particularly useful for a 10 Gigabit transmission network as a signal transmission system of a UTP cable using copper, which requires the prevention of alien crosstalk.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, the terms used in this specification and claims should not be interpreted in a dictionary sense, but based on the principle that the inventor can appropriately define the concept of terms in order to best explain the invention. Therefore, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments shown in the present specification and the drawings are only exemplary embodiments of the present invention, and not all of the technical ideas of the present invention are presented. Therefore, various equivalents It should be understood that water and variations may exist.

1 is a perspective view of a UTP cable according to the present invention, Figure 2 is a cross-sectional view of the UTP cable according to the present invention, Figure 3 is a schematic diagram showing a large pitch (p) of the twisted pair according to the present invention.

1 to 3, the UTP cable according to the present invention is formed so that two insulation-coated wires 110 are twisted in a spiral to have a large pitch (p), and are sequentially provided in a clockwise or counterclockwise direction. First, second, third, and fourth twisted pairs 121, 122, 123, and 124; A separator (130) for separating the first, second, third, and fourth twisted pairs (121, 122, 123, 124) from each other; An aggregated twisted line part 125 including the first, second, third, and fourth twisted pair parts 121, 122, 123, and 124 and a separator 130, which are twisted in a spiral to have an aggregate pitch P; In the UTP cable comprising a sheath 140 surrounding the assembly twisted line portion 125, wherein the assembly pitch P is provided to have a range of 40 mm (mm) or more and 200 mm (mm) or less. A large pitch p of the one twisted pair part 121 is 11.71 (± 0.3) millimeters (mm), and a large pitch p of the second twisted pair part 122 is 10.34 (± 0.3) millimeters (mm), A large pitch p of the third stranded part 123 is 8.63 (± 0.3) millimeter (mm), and a large pitch p of the fourth stranded part 124 is 9.45 (± 0.3) millimeter (mm). Is provided.

Here, the condition having the above-mentioned large pitch p value is defined as <optimal large pitch p condition 1>.

The UTP cable has a structure in which a plurality of twisted pairs 120 in which two insulation-coated wires 110 are spirally twisted together are assembled in the sheath 140, and four stranded wires are included in the sheath 140 of the UTP cable. The unit 120 is assembled, and such a set of twisted pairs 120 is called an aggregated twisted pair 125.

In addition, inside the UTP cable having a plurality of twisted pairs 120, a separator 130 isolating each twisted pair 120 to prevent alien cross talk between the twisted pairs 120. It is enlisted.

Here, the separator 130 has a structure in which four partition walls intersect each other so as to intersect each strand 120, and the thickness of the separator 130 is preferably about 0.2 to 1.0 mm. The separator 130 has the effect of reducing the distance between the twisted pairs 120 as much as possible to reduce the cross talk between the adjacent twisted pairs (120).

Here, the separator 130 is preferably made of a dielectric such as polyethylene (PE) or polypropylene (PP), although in FIG. 2, the shape of the separator 130 is expressed in a cross shape. The shape of the separator 130 is not limited thereto, and may be provided in various shapes.

In addition, the sheath 140 is coated to surround the assembly twisted line part 125 and is made of a polymer resin and a conductive material. The material may be a polymer resin, or a conductive material having electromagnetic wave shielding properties, and one or more mixtures selected from carbon black, acetylene black, metal fibers, conductive polymers, and metal powders.

On the other hand, the large pitch p, as shown in Figure 3, when the two wires 110 form a stranded wire portion 120, the unit pitch (twisted round) is applied to the stranded wire portion 120, It is a value indicating the length of forming the twisted pair portion 120, the collective pitch (P) is the collective twisted pair when the unit pitch is applied to the collective twisted pair portion 125 provided in a mutual configuration of the plurality of twisted pair portion 120 It is a value indicating the length of the portion 125.

The first, second, third, and fourth twisted pair portions 121, 122, 123, and 124 are sequentially arranged counterclockwise with respect to the first twisted pair portion 121 provided on the upper right side as shown in FIG. 2.

Here, the large pitch p of the first stranded part 121 is 11.71 (± 0.3) millimeters (mm), and the large pitch p of the second stranded part 122 is 10.34 (± 0.3) millimeters (mm). The large pitch p of the third twisted pair 123 is 8.63 (± 0.3) millimeters (mm), and the large pitch p of the fourth twisted pair 124 is 9.45 (± 0.3) millimeters (mm). Is provided.

In addition, when the large pitch p of the first, second, third, and fourth twisted pairs 121, 122, 123, and 124 is the same or similar, crosstalk occurs between the twisted pairs 120, respectively. The large pitch (p) of the twisted pair portion 120 of is preferably adjusted differently, and the numerical value of the large pitch (p) is optimally calculated to attenuate the crosstalk of the UTP cable measured based on several experimental values. It is a shame.

In addition, the position where the first stranded wire part 121 is provided is not limited as described above, and the arrangement direction may be clockwise, but as described above, a large pitch p for maximum crosstalk attenuation effect is provided. Since it is limited, the sequential arrangement should be configured based on the position of the first twisted pair part 121.

Here, the error range of (± 0.3) millimeters (mm) included in the first, second, third, fourth stranded portions 121, 122, 123, and 124 is a perfect large pitch (p) value in actual processing. Since configuring the stranded portion 120 is not practical, it means an error range that may occur in actual processing.

Here, the collective twisted pair 125 is provided as a set of the first, second, third, and fourth twisted pairs 121, 122, 123, and 124 having the large pitch p as described above. ), As described above, is formed to have a value of the aggregate pitch P which ranges from 40 millimeters (mm) to 200 millimeters (mm) or less.

When the aggregated pitch P of the collective stranded part 125 is formed to be less than 40 millimeters (mm), the length of the entire conductive wire 100 which is twisted due to the short pitch is increased, thereby not only increasing the material consumption. The crosstalk attenuation effect between the twisted pairs 120 is insignificant, and when the collective pitch P of the collective twisted pairs 125 exceeds 200 millimeters (mm), due to the restoring force of the cable itself, the collective pitch (P) is difficult to maintain, and since the installation of the sheath 140 surrounding the assembly twisted line part 125 becomes difficult, the manufacturing cost and production time of the entire UTP cable increases.

Meanwhile, a lip cord 146 may be formed inside the sheath 140 to easily peel off the sheath of the sheath 140.

The rip cord 146 is intended to improve the ease of operation by quickly and accurately peeling the outer sheath of the sheath 140 during the installation or maintenance work of the UTP cable, it may be preferably made of a synthetic resin material.

On the other hand, the UTP cable according to the present invention is formed so that the two insulation coated wires 110 are twisted in a spiral to have a large pitch (p), the first, second, Three and four stranded portions 121, 122, 123, and 124; A separator (130) for separating the first, second, third, and fourth twisted pairs (121, 122, 123, 124) from each other; An aggregated twisted line part 125 including the first, second, third, and fourth twisted pair parts 121, 122, 123, and 124 and a separator 130, which are twisted in a spiral to have an aggregate pitch P; In the UTP cable comprising a sheath 140 surrounding the assembly twisted line portion 125, wherein the assembly pitch P is provided to have a range of 40 mm (mm) or more and 200 mm (mm) or less. The large pitch p of the one stranded part 121 is 11.71 (± 0.3) millimeters (mm), and the large pitch p of the second stranded part 122 is 8.63 (± 0.3) millimeters (mm), A large pitch p of the third stranded part 123 is 10.34 (± 0.3) millimeters (mm), and a large pitch p of the fourth stranded part 124 is 9.45 (± 0.3) millimeters (mm). It may be provided as.

Here, the condition having the above-mentioned large pitch p value is defined as <optimal large pitch p condition 2>.

In addition, when the large pitch p of the first, second, third, and fourth twisted pairs 121, 122, 123, and 124 is the same or similar, crosstalk occurs between the twisted pairs 120, respectively. The large pitch (p) of the twisted pair portion 120 of is preferably adjusted differently, and the numerical value of the large pitch (p) is optimally calculated to attenuate the crosstalk of the UTP cable measured based on several experimental values. It is a shame.

The UTP cable provided as described above, in order to derive an optimum large pitch (p) condition for attenuation of crosstalk between the twisted pairs 120, the UTP cable described above and the first, second, third, fourth twisted pairs ( Since only the values of the large pitch p of 121, 122, 123, and 124 are different, and the description about the remaining structure is the same, it replaces with the above description in order to avoid duplication of description.

On the other hand, the UTP cable according to the present invention is formed so that the two insulation coated wires 110 are twisted in a spiral to have a large pitch (p), the first, second, Three and four stranded portions 121, 122, 123, and 124; A separator (130) for separating the first, second, third, and fourth twisted pairs (121, 122, 123, 124) from each other; An aggregated twisted line part 125 including the first, second, third, and fourth twisted pair parts 121, 122, 123, and 124 and a separator 130, which are twisted in a spiral to have an aggregate pitch P; In the UTP cable comprising a sheath 140 surrounding the assembly twisted line portion 125, wherein the assembly pitch P is provided to have a range of 40 mm (mm) or more and 200 mm (mm) or less. A large pitch p of the one twisted line part 121 is 12.09 (± 0.3) millimeters (mm), and a large pitch p of the second stranded part 122 is 10.34 (± 0.3) millimeters (mm), A large pitch p of the third stranded part 123 is 8.63 (± 0.3) millimeter (mm), and a large pitch p of the fourth stranded part 124 is 9.45 (± 0.3) millimeter (mm). It may be provided as.

Here, the condition having the above-mentioned large pitch p value is defined as <optimal large pitch p condition 3>.

In addition, when the large pitch p of the first, second, third, and fourth twisted pairs 121, 122, 123, and 124 is the same or similar, crosstalk occurs between the twisted pairs 120, respectively. The large pitch (p) of the twisted pair portion 120 of is preferably adjusted differently, and the numerical value of the large pitch (p) is optimally calculated to attenuate the crosstalk of the UTP cable measured based on several experimental values. It is a shame.

The UTP cable provided as described above, in order to derive an optimum large pitch (p) condition for attenuation of crosstalk between the twisted pairs 120, the UTP cable described above and the first, second, third, fourth twisted pairs ( Since only the values of the large pitch p of 121, 122, 123, and 124 are different, and the description about the remaining structure is the same, it replaces with the above description in order to avoid duplication of description.

On the other hand, the UTP cable according to the present invention is formed so that the two insulation coated wires 110 are twisted in a spiral to have a large pitch (p), the first, second, Three and four stranded portions 121, 122, 123, and 124; A separator (130) for separating the first, second, third, and fourth twisted pairs (121, 122, 123, 124) from each other; An aggregated twisted line part 125 including the first, second, third, and fourth twisted pair parts 121, 122, 123, and 124 and a separator 130, which are twisted in a spiral to have an aggregate pitch P; In the UTP cable comprising a sheath 140 surrounding the assembly twisted line portion 125, wherein the assembly pitch P is provided to have a range of 40 mm (mm) or more and 200 mm (mm) or less. The large pitch p of the one twisted pair part 121 is 12.09 (± 0.3) millimeters (mm), and the large pitch p of the second twisted pair part 122 is 8.63 (± 0.3) millimeters (mm), A large pitch p of the third stranded part 123 is 10.34 (± 0.3) millimeters (mm), and a large pitch p of the fourth stranded part 124 is 9.45 (± 0.3) millimeters (mm). It may be provided as.

Here, the condition having the above-mentioned large pitch p value is defined as <optimal large pitch p condition 4>.

In addition, when the large pitch p of the first, second, third, and fourth twisted pairs 121, 122, 123, and 124 is the same or similar, crosstalk occurs between the twisted pairs 120, respectively. The large pitch (p) of the twisted pair portion 120 of is preferably adjusted differently, and the numerical value of the large pitch (p) is optimally calculated to attenuate the crosstalk of the UTP cable measured based on several experimental values. It is a shame.

The UTP cable provided as described above, in order to derive an optimum large pitch (p) condition for attenuation of crosstalk between the twisted pairs 120, the UTP cable described above and the first, second, third, fourth twisted pairs ( Since only the values of the large pitch p of 121, 122, 123, and 124 are different, and the description about the remaining structure is the same, it replaces with the above description in order to avoid duplication of description.

Hereinafter, through the following test example, looks at the UTP cable according to the present invention can attenuate crosstalk in a high-speed data transmission environment. In addition, for the accurate value of the test example, the values of the first, second, third, and fourth twisted pairs 121, 122, 123, and 124 of the UTP cable were configured differently (variable control), and all other components. The figures and externalities of the two were configured identically (control variables).

Comparative example

The UTP cable used in the comparative example used a Cat.6 product (see FIG. 2) manufactured according to the prior art. The large pitch P1 of the first stranded part was 10.9 (mm), and the large pitch P2 of the second stranded part (p2). ) Is 8.5 (mm), the large pitch of the third twisted pair (p3) is 10.3 (mm), and the large pitch of the fourth twisted pair (p4) is 9.1 (mm). Set similarly.

In addition, the first stranded wire part 121 is disposed with respect to the upper right side, and then, the second, third, and fourth stranded wire parts 122, 123, and 124 are sequentially arranged in the counterclockwise direction. The aggregated pitches P of the 2, 3 and 4 stranded portions 121, 122, 123 and 124 were set to 60 (mm).

 In addition, the sheath 140 is made of polyvinyl chloride (PVC) having a thickness of 0.6 mm, and the thickness of the partition wall separating the strands 121, 122, 123, and 124 from the separator 130 of the UTP cable used. Are all the same, and no structure is installed in the partition wall.

Using the UTP cable manufactured as described above, the signal was transmitted while varying the frequency of 1MHz ~ 650MHz to 100m UTP cable according to the draft standard of IEEE 802.3, and the data loss generated by crosstalk was measured.

The measurement results are shown in FIG. In FIG. 4, the solid line indicates the interference phenomenon of the IEEE 802.3 draft standard, and the wave form indicates the measurement result of the comparative example.

Example

The UTP cable (refer to FIG. 4) used in the embodiment of the present invention is characterized in that the first, second, third, and fourth twisted pairs 121, 122, 123, and 124 of the UTP cable according to the <optimal large pitch (p) condition 2 described above. Large pitches (p1, p2, p3, p4) were configured, and the first twisted pair 121 is disposed with respect to the upper right side, and then the second, third, and fourth twisted pairs 122, 123 in a counterclockwise direction. , 124 were sequentially arranged, and the set pitch P of the first, second, third, and fourth twisted pairs 121, 122, 123, and 124 was set to 60 (mm).

In addition, the sheath 140 is made of polyvinyl chloride (PVC) having a thickness of 0.6 mm, and the thickness of the partition wall separating the strands 121, 122, 123, and 124 from the separator 130 of the UTP cable used. Are the same as the above-described comparative example, and no structure is installed in the partition wall. Here, in order to accurately calculate the experimental value, the protrusion 142 according to the present invention is not configured, and only the comparative example and the large pitch p are configured differently.

Using the UTP cable manufactured according to the present invention as described above, the signal was transmitted while varying the frequency of 1MHz ~ 650MHz to 100m UTP cable according to the draft standard of IEEE 802.3, and the data loss generated by crosstalk was measured .

The measurement results are shown in FIG. The solid line in FIG. 5 is the interference phenomenon standard of the draft standard of IEEE 802.3, and the wave form is the measurement result of this embodiment.

Referring to FIG. 4, in the comparative example, the UTP cable manufactured according to the related art showed a result that the second stranded part and the third stranded part exceeded the standard value in the 200 to 300 MHz band in the crosstalk measurement experiment.

On the other hand, referring to Figure 5, the UTP cable manufactured by the present invention in the embodiment showed the results satisfying the standard value over the entire band in the experiment to measure the cross talk.

In addition, the tests of <optimal large pitch (p) condition 1>, <optimal large pitch (p) condition 3>, and <optimal large pitch pitch (p) condition 4> were performed several times as described above. The results were also similar to the results described above in Comparative Examples and Examples.

As mentioned above, although the present invention has been described by way of limited comparative examples, examples, and drawings, the technical idea of the present invention is not limited to the above, and should be understood by those skilled in the art to which the present invention pertains. Various modifications and variations may be made without departing from the spirit and scope of the appended claims.

The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.

1 is a perspective view of a UTP cable according to the present invention,

2 is a cross-sectional view of a UTP cable according to the present invention,

3 is a schematic diagram showing a large pitch p of a twisted pair according to the present invention;

4 is a graph measuring the crosstalk of a UTP cable having a large pitch value different from the optimum large pitch according to the present invention;

5 is a graph measuring crosstalk of a UTP cable having an optimum large pitch according to the present invention.

Explanation of symbols on the main parts of the drawings

100: conductor 110: electric wire

120: stranded part 121, 122, 123, 124: 1st, 2, 3, 4 stranded part

125: assembly twisted line 130: separator

140: sheath

Claims (8)

First, second, third, and fourth twisted pair portions of two insulation-coated wires spirally twisted to have a large pitch (p) and sequentially provided in a clockwise or counterclockwise direction; A separator for separating the first, second, third and fourth twisted pairs from each other; An aggregated stranded portion including the first, second, third, and fourth stranded portions and a separator, the collective stranded portion being twisted in a spiral to have an aggregated pitch (P); In the UTP cable including; The aggregate pitch is provided to have a range of 40 mm (mm) or more and 200 mm (mm) or less. The large pitch of the first twisted pair is 11.71 (± 0.3) millimeters (mm), The large pitch of the second twisted pair is 10.34 (± 0.3) millimeters (mm), The major pitch of the third twisted pair is 8.63 (± 0.3) millimeter (mm), A large pitch of the fourth twisted pair is provided in 9.45 (± 0.3) millimeters (mm) UTP cable. The method of claim 1, The inside of the sheath UTP cable, characterized in that a lip cord (Rip-cord) is formed to easily peel off the sheath of the sheath. First, second, third, and fourth twisted pair portions of two insulation-coated wires spirally twisted to have a large pitch (p) and sequentially provided in a clockwise or counterclockwise direction; A separator for separating the first, second, third and fourth twisted pairs from each other; An aggregated stranded portion including the first, second, third, and fourth stranded portions and a separator, the collective stranded portion being twisted in a spiral to have an aggregated pitch (P); In the UTP cable including; The aggregate pitch is provided to have a range of 40 mm (mm) or more and 200 mm (mm) or less. The large pitch of the first twisted pair is 11.71 (± 0.3) millimeters (mm), The large pitch of the second twisted pair is 8.63 (± 0.3) millimeter (mm), A large pitch of the third twisted pair is 10.34 (± 0.3) millimeters (mm), A large pitch of the fourth twisted pair is provided in 9.45 (± 0.3) millimeters (mm) UTP cable. The method of claim 3, wherein The inside of the sheath UTP cable, characterized in that a lip cord (Rip-cord) is formed to easily peel off the sheath of the sheath. First, second, third, and fourth twisted pair portions of two insulation-coated wires spirally twisted to have a large pitch (p) and sequentially provided in a clockwise or counterclockwise direction; A separator for separating the first, second, third and fourth twisted pairs from each other; An aggregated stranded portion including the first, second, third, and fourth stranded portions and a separator, the collective stranded portion being twisted in a spiral to have an aggregated pitch (P); In the UTP cable including; The aggregate pitch is provided to have a range of 40 mm (mm) or more and 200 mm (mm) or less. The large pitch of the first stranded portion is 12.09 (± 0.3) millimeter (mm), The large pitch of the second twisted pair is 10.34 (± 0.3) millimeters (mm), The major pitch of the third twisted pair is 8.63 (± 0.3) millimeter (mm), A large pitch of the fourth twisted pair is provided in 9.45 (± 0.3) millimeters (mm) UTP cable. The method of claim 5, The inside of the sheath UTP cable, characterized in that a lip cord (Rip-cord) is formed to easily peel off the sheath of the sheath. First, second, third, and fourth twisted pair portions of two insulation-coated wires spirally twisted to have a large pitch (p) and sequentially provided in a clockwise or counterclockwise direction; A separator for separating the first, second, third and fourth twisted pairs from each other; An aggregated twisted line portion including the first, second, third, and fourth twisted pairs and a separator, the twisted pair being spirally formed to have a combined pitch P; In the UTP cable including; The aggregate pitch is provided to have a range of 40 mm (mm) or more and 200 mm (mm) or less. The large pitch of the first stranded portion is 12.09 (± 0.3) millimeter (mm), The large pitch of the second twisted pair is 8.63 (± 0.3) millimeter (mm), A large pitch of the third twisted pair is 10.34 (± 0.3) millimeters (mm), A large pitch of the fourth twisted pair is provided in 9.45 (± 0.3) millimeters (mm) UTP cable. The method of claim 7, wherein The inside of the sheath UTP cable, characterized in that a lip cord (Rip-cord) is formed to easily peel off the sheath of the sheath.

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