KR100603087B1 - Utp cable assembly having means for preventing cross talk - Google Patents

Abstract

The present invention relates to a UTP cable structure, and more particularly, to a UTP cable structure in which at least two UTP cables in which a plurality of insulated wire pairs are spirally twisted and a plurality of wire pairs are gathered in a sheath; And a web member interposed between the UTP cables so as to connect the adjacent UTP cables to each other and maintain the spacing between the cables, wherein the width of the web member is 0.2 mm to 2.0 mm. .

According to the present invention, crosstalk between wire pairs can be prevented, and the transmission characteristics of the UTP cable can be stably maintained.

UTP cable, Alien cross talk, Web, Pitch

Description

[0001] UTP CABLE ASSEMBLY HAVING MEANS FOR PREVENTING CROSS TALK [0002]

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further the understanding of the technical idea of the invention, And should not be construed as limiting.

1 is a perspective view showing an ordinary wire pair provided in a UTP cable;

2 is a cross-sectional view showing a configuration of a bundled UTP cable according to the prior art;

3 is a cross-sectional view showing a configuration of a UTP cable assembly according to an embodiment of the present invention;

4 is a cross-sectional view showing a configuration of a UTP cable assembly according to another embodiment of the present invention;

5 is a graph showing the measured values of the UTP cable assembly according to the present invention and the alien crosstalk regulation value of IEC61156-5.

DESCRIPTION OF THE REFERENCE NUMERALS OF THE DRAWINGS

P1 ~ P16 ... wire pair 100,101 ... wire

102 ... sheath 103 ... web member

104 ... cross filler

The present invention relates to a UTP (unshielded twisted pair) cable assembly, and more particularly, to a UTP cable assembly having a structure capable of preventing crosstalk between wire pairs in order to improve transmission characteristics.

The UTP cable is an unshielded twisted-pair cable widely used for the construction of a communication network such as a LAN, for example. As shown in FIG. 1, two insulation-coated wires 10 and 11 are connected to each other by a pair of helically- P, and is typically formed as a bundle type in which two or more cables C are gathered as shown in FIG.

However, in the conventional bundle type UTP cable, since the adjacent cables are arranged so as to be in contact with each other The weak point is that the electromagnetic field induced in the conductors of each single UTP cable causes an Alien cross talk that has an electromagnetic effect on the adjacent UTP cable.

These Alien cross talks are based on IEC 61156-5, Multicore and symmetrical pair / quad cables for digital communications- Part 5: Symmetrical pair / quad cables with transmission characteristics up to 600MHz- Horizontal floor wiring- Sectional specification 3.3.11 The regulatory scope and specific regulatory limits are limited.

In addition, the conventional UTP cable assembly has a structure in which the self pitch of the wire pairs located at mutually corresponding points in each UTP cable and the collective pitch of mutually twisted wire pairs are designed to have the same length for each UTP cable The UTP cables placed at the center of the cable assembly are subjected to extreme electromagnetic influences from all four sides of the cable, and these extreme electromagnetic effects are transmitted from the signal transmission system to the noise There is a problem of causing a communication failure.

It is an object of the present invention to provide a UTP cable assembly having a structure for preventing crosstalk between inner wire pairs of mutually adjacent UTP cables.

Another object of the present invention is to provide a UTP cable assembly having a pitch condition of a wire pair that can suppress the occurrence of crosstalk.

In order to accomplish the above object, a UTP cable assembly according to a preferred embodiment of the present invention includes at least two UTP cables having a plurality of wire pairs, each of which is spirally twisted with two insulation-coated wires, And a web member interposed between the UTP cables so as to connect the adjacent UTP cables to each other and maintain the spacing between the cables, wherein the width of the web member is 0.2 mm to 2.0 mm. .

The width of the web member is designed to minimize crosstalk between UTP cables and to maintain an appropriate spacing. If the width of the web member is too small, it may cause disassembly of the UTP cable assembly and cable damage, It is difficult to keep the proper distance of the UTP cable. Therefore, the width is preferably set to 0.2 mm to 2.0 mm, more preferably 0.8 mm to 1.2 mm.

For a UTP cable, the minimum value of the wire pair pitch to satisfy the crosstalk characteristics and other characteristics in a 4-pair single UTP cable is about 8 mm and the maximum value is about 20 mm. And the pitch value of the remaining two pairs of wire pairs in the four pair single UTP cable is further determined between the minimum value and the maximum value. The pitch combination between the four pairs of wire pairs in a single UTP cable thus determined satisfies the electrical characteristics of each single UTP cable.

Each single UTP cable must satisfy the electrical characteristics even when the single UTP cable includes a web member interposed between the UTP cables so as to keep the UTP cable separated by at least two UTP cables, It is preferable that the wire pair pitch values located at mutually corresponding points have different lengths. In this case, the difference in the pitch value between the corresponding wire pairs is preferably 0.2 mm or more.

Four pairs of wire pairs can be gathered in the sheath of the UTP cable. In this case, the pitch difference between the four pairs of wire pairs is 0.5 mm to 7.5 mm, and more preferably 1.0 mm to 7.0 mm.

In the present invention, it is preferable that when four or more UTP cables are connected in cascade, the pitches of odd-numbered and even-numbered wire pairs are the same.

Additionally, a cross filler may be provided in the sheath to isolate the wire pairs within the UTP cable from one another.

Further, the web member is preferably formed of PVC (polyvinyl chloride) or LSZH (low smoke halogen free) material.

Another UTP cable assembly according to another embodiment of the present invention includes at least two UTP cables in which a plurality of insulated wire pairs are spirally twisted and a plurality of wire pairs are gathered in a sheath; And a web member having a width of 0.2 mm to 2.0 mm and interposed between the UTP cables so as to connect the adjacent UTP cables to each other and maintain the spacing between the cables, wherein the wire pairs in the UTP cable are connected to each other at a constant collective pitch And is characterized in that the collective pitches of the UTP cables are different from each other. In this case, the aggregate pitch is preferably 50 mm to 200 mm, more preferably 70 mm to 150 mm.

When four or more UTP cables are cascade-connected, it is preferable that the collective pitches of the wire pairs in odd-numbered and even-numbered groups have the same length.

Additionally, a cross filler may be provided in the sheath to isolate the wire pairs within the UTP cable from one another.

Further, it is preferable that the web member is formed of PVC (polyvinyl chloride) or LSZH (low smoke halogen free) material, and its width is preferably 0.2 mm to 2.0 mm, more preferably 0.8 mm to 1.2 mm.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

3 is a cross-sectional view showing a configuration of a UTP cable assembly according to an embodiment of the present invention.

3, the UTP cable assembly according to an embodiment of the present invention includes at least two UTP cables C1 and C2 having a plurality of wire pairs P1 to P8 therein, and an adjacent UTP cable C1 , And C2).

The order of the wire pairs P1 to P8 in FIG. 3 corresponds to the shortest pitch P1, P5 in each single UTP cable, P4 and P8 in the single UTP cable P1 to P4 and P5 to P8, respectively, The short and long sequence is the same for each single UTP cable.

The UTP cables C1 and C2 have a structure in which a plurality of wire pairs P 1 to P 8 in which two insulation-coated wires 100 and 101 are helically twisted are gathered in the sheath 102.

The web member 103 is interposed between the UTP cables C1 and C2 so that the adjacent UTP cables C1 and C2 are connected to each other and the spacing between the UTP cables C1 and C2 is maintained to prevent alien crosstalk . The web member 103 is made of a web structure having an easy tearing property for convenience of cable disassembly and is preferably made of polyvinyl chloride (PVC) or low smoke zero (LSZH) material, and the shape thereof is not limited to that shown in the drawings, and can be variously modified. The width W of the web member 103 is preferably set to 0.2 mm to 2.0 mm, more preferably 0.8 mm to 1.2 mm, so as to minimize the crosstalk while maintaining an appropriate distance between the UTP cables C1 and C2 Mm. ≪ / RTI > In order to maximize the crosstalk prevention performance, the pitch and aggregate pitch of the wire pairs constituting the UTP cables (C1, C2) are configured as follows.

In the UTP cables C1 and C2 mutually connected with the web member 103 therebetween, the pitches of the wire pairs located at mutually corresponding points, such as P1 and P5 and P4 and P8, It is preferable that they have different lengths so as to be minimized. At this time, it is preferable to keep the pitch difference between the corresponding wire pairs equal to or greater than 0.2 mm in order to prevent electromagnetic interaction.

Four wire pairs are assembled in the sheath 102 of the UTP cables C1 and C2. The pitch difference between the pairs is 0.5 mm to 7.5 mm (more preferably 1.0 mm to 7.0 mm) in order to minimize electromagnetic interaction. ). Here, it goes without saying that the number of wire pairs is not limited to this embodiment and can be variously modified.

In addition, a cross filler 104 is inserted in the UTP cables (C1, C2) having four wire pairs to isolate the wire pairs from each other to prevent cross talk between the pairs. The cross filler 104 has a structure in which four barrier ribs cross each other to interpose between the wire pairs.

When four or more UTP cables are cascade-connected, it is preferable that the collective pitches of the wire pairs in odd-numbered and even-numbered groups have the same length.

In another embodiment of the present invention, the wire pairs in the UTP cable (C1, C2) can be gathered together at a constant aggregate pitch. That is, the UTP cable C1 has a structure in which the wire pairs P1 to P4 are spirally twisted at a constant collective pitch, and the UTP cable C2 has wire spirals P5 to P8 spirally twisted at a certain set pitch. Here, it is preferable that the aggregate pitch of the UTP cable C1 and the aggregate pitch of the UTP cable C2 have different lengths from each other to prevent crosstalk between the wire pairs. The reason is that the electromagnetic phenomena is applied in inverse proportion to the distance between the wires. This is because, if the collective pitches of the conductors are the same, the distances between the corresponding pairs of the UTP cables are kept constant, so that the influence of the alien crosstalk between the pairs can be maximized. In this case, the aggregate pitch of the UTP cables C1 and C2 may be set to 50 mm to 200 mm, more preferably 70 mm to 150 mm, in order to prevent more effective crosstalk.

A web member is interposed between the UTP cables to connect the adjacent UTP cables to each other while maintaining the spacing between UTP cables to prevent alien crosstalk. The web member is made of a web structure having a tearing property for convenience of cable disassembly and is preferably made of polyvinyl chloride (PVC) or low smoke zero halogen (PVC). LSZH), and the shape thereof is not limited to that shown in the drawings, and can be variously modified. The width W of the web member is preferably set to 0.2 mm to 2.0 mm, more preferably to 0.8 mm to 1.2 mm, so as to minimize the crosstalk while maintaining an appropriate distance between the UTP cables.

FIG. 4 shows an embodiment in which four UTP cables C1 to C4 are cascade-connected. As shown in the figure, when four or more UTP cables are cascade-connected, the odd-numbered cable groups (see C1 and C3) and the even-numbered cable groups (see C2 and C4) While the adjacent cable groups have different pitches from each other, in order to prevent crosstalk between the wire pairs P1 to P16.

FIG. 5 is a graph showing the relationship between the regulated value P20 of the alien crosstalk defined in IEC61156-5 and the regulated value P20 of the embodiment of the present invention in which the conditions for maintaining the spacing distance between the UTP cables and the conditions for optimizing the pitch condition are applied. The actual measured value of the pair is shown.

Since the UTP cable assemblies of the present invention having the above-described configuration are interconnected with the UTP cables maintained at proper distances by the web member 103, the wire pairs of the adjacent UTP cables do not affect each other electromagnetically, The generation of torque is prevented.

In addition, the UTP cables are formed such that the pitch of the wire pairs located at the mutually corresponding points or the aggregate pitches of the adjacent UTP cables have different lengths, so that the electromagnetic interaction between the wire pairs is minimized to effectively prevent crosstalk .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

According to the present invention, since the distance between UTP cables can be kept constant at an appropriate value, alien crosstalk generated between wire pairs can be prevented, and a standardized UTP cable assembly can be manufactured.

In particular, since the UTP cables are connected to each other with a constant interval by the web structure having a tearing property, the cable can be easily disassembled during construction.

Further, according to the present invention, it is possible to provide a UTP cable assembly in which the pitch condition is optimized so as to minimize the electromagnetic interaction between the wire pairs.

The present invention as described above can be very usefully used in a 10 Gbit-class transmission network as a signal transmission system of a communication cable using copper, which is required to prevent alien crosstalk.

Claims (18)

At least two UTP cables in which a plurality of insulated wire pairs are spirally twisted and a plurality of wire pairs are gathered in the sheath; And And a web member having a width of 0.2 mm to 2.0 mm interposed between the UTP cables so as to connect adjacent UTP cables to each other and to maintain the spacing between the cables, Wherein at least one wire pair among the wire pairs located at mutually corresponding points between the UTP cables has a different pitch value, Wherein the wire pairs in the UTP cable are twisted to each other at a constant collective pitch and the collective pitches of the UTP cables are different from each other. The method according to claim 1, And the width of the web member is 0.8 mm to 1.2 mm. delete The method according to claim 1, Wherein a difference in pitch value of a wire pair located at a mutual correspondence point between the UTP cables is 0.2 mm or more. The method according to claim 1, A wire pair having the shortest pitch value and a wire pair having the longest pitch value are disposed adjacent to each other in a plurality of wire pairs assembled into a single UTP cable. 6. The method of claim 5, Wherein four wire pairs are assembled in the sheath of the UTP cable. The method according to claim 6, And a pitch difference between the four wire pairs is 0.5 mm to 7.5 mm. 8. The method of claim 7, And a pitch difference between the four wire pairs is 1.0 mm to 7.0 mm. The method according to claim 1, Wherein four or more UTP cables are cascade-connected, and the self-pitch of the wire pairs between the odd-numbered and even-numbered groups has the same length. The method of claim 1, wherein And a cross filler inserted into the sheath of the UTP cable to isolate the wire pairs from each other. The method according to claim 1, Wherein the web member is made of polyvinyl chloride (PVC) or low smoke halogen free (LSZH) material. delete delete The method according to claim 1, And the length of the collective pitch is 50 mm to 200 mm. The method according to claim 1, And the length of the collective pitch is 70 mm to 150 mm. delete delete delete

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