KR100330921B1 - Cross-Filer Design for Data Cable - Google Patents

Abstract

The present invention relates to a cross filler for a data cable characterized by satisfying all of the prescribed transmission characteristics and ensuring a sufficient margin in all frequency bands up to each regulated frequency. A conductor provided in a divided size to change electrical characteristics according to a variation in diameter; An insulator made of polyethylene, the material of which protects the conductor, serves to maintain a circular shape of the product, and is formed in one cable assembly, the outer core having a plurality of insulating cores; A large portion for satisfying transmission characteristics by dividing the insulated product into two cores or more in one cable assembly to distinguish core arrangements, and having four pairs having different outer diameters; A cross-shaped filler that divides the cable core into four quarters to isolate each pair, maintains the arrangement of the pair, and acts as an overall core shield, and separates each pair into a cross shape; An aggregation unit for grouping a product in association with the insulated product in a core unit or a pair unit or more; The material is made of PVC, and protects the insulator, characterized in that it comprises a sheath body 50 to protect the insulators and conductors by buffering the mechanical maintenance of the product and the mechanical and chemical shock applied from the outside.

Description

Cross Filler for Data Cables {Cross-Filer Design for Data Cable}

The present invention relates to a cross filler for a data cable, and in particular, to satisfy all transmission characteristics specified in a sweep frequency up to each regulated frequency and to ensure sufficient margin. The cross filler for a cable.

In general, there are various types of cables for data transmission, among them, UTP cable is used for systems that require fast and high reliability of large-capacity data transmission of LAN, IBS, and mainly PC communication, such as LAN, IBS, and Internet. Used for telecommunication cables and multi-media services (large data transfer) in residential buildings.

The classification of UTP cable is Cat (Category) .3 (16MHz), Cat.4 (20MHz), Cat.5 (100MHz), Cat.6 (250MHz), Cat.7 (600) ㎒), Cat.8 (1200MHz), and classified into UTP (Unshiled Twisted Pair), FTP (Foiled Twisted Pair), and STP (Shiled Twisted Pair).

In addition, it may be classified according to the number of pairs and flame retardant characteristics criteria.

The structural classification of the UTP cable is mainly divided into three types, divided into UTP type, FTP type, STP type.

1) UTP type: UTP type is the most general and generalized type among three types, and basically can produce similar products any time if it consists of wire, insulation, lead, assembly, sheath process.

The structural feature is that two insulated conductors are twisted in a pair, and four pairs are twisted to form a total of 8 cores.

This type is cheaper than the conventional coaxial cable or optical cable, and the structure is simple and the diameter is small, so it is easy to connect and peel off, and it is easy to install and withdraw, move and change.

(2) FTP type:

The FTP type is a cable considering the installation environment conditions in addition to the UTP type.

In other words, when a high voltage line, which is a noise source, is installed around the ground, the noise and organic signals induced therein are grounded to further enhance transmission characteristics.

In terms of structure, a shielding layer (metal type) is added to the entire UTP structure, and this shielding layer generates another organic signal, which affects important attenuation characteristics, which is particularly important in transmission characteristics. There are disadvantages to falling.

(3) STP type:

In general UTP type, it is possible to transmit in the frequency band up to 200-350MHz (or Mbps), but in the higher frequency band, it is impossible because of the difference between crosstalk characteristic and attenuation characteristic (called ACR, which can be transmitted at least 10dB). .

In order to solve this problem, the STP type was introduced.As a structural solution, the individual pairs are shielded by metal type to improve the crosstalk characteristic, and the pitch is relatively long to improve the attenuation value, so that the ACR value is more than 10dB. It is a structure.

With this structure, the characteristics of Cat.7 and Cat.8 can be realized.

The existing Cat.6 UTP structure is shown in FIG.

That is, in the drawing, 10 is a conductor, material is copper, and a standard is 24 AWG, and the part which can change electrical characteristics according to the variation of material and level and conductor diameter of copper.

In addition, 20 is an insulator, which is made of polyethylene, which protects the conductors and connects the product to maintain the circular shape. In particular, the insulator material determines whether the properties of the physical properties, electrical properties, and flame retardant flame retardant are satisfied. It is an important part, and structurally, all eight cores are made of the same material and two types of insulated core wire outer diameters.

And 30 is a large edge, in which the insulated product is grouped into two or more cores, this group form is to indicate the core arrangement and the shape of the cable.

In addition, 40 denotes an assembly unit, in which an insulated product or a matched product is grouped into a core unit or a pair unit or more, and is a part for representing the core arrangement and the shape of the cable having the same function as the main work.

In addition, 50 is a sheath, and the material is PVC, which protects the insulator, protects the conductor of the insulator by maintaining the circular shape of the product and buffering mechanical or chemical shocks from the outside. Characteristics and flame retardant properties are part of acting as a fire protection.

In addition, 60 is a circular filler, which is a means for structurally stabilizing a phenomenon in which pairs are separated or distorted during assembly.

However, in terms of electrical characteristics, the electrical requirements are required to test the electrical characteristics in the frequency band within 100 MHz (or Mbps) with a length requirement specification of less than 100m for products manufactured and manufactured in the generalized product (Cat.3,5,6) specification. Specs can be met, but in the frequency band above 100 MHz (or Mbps), there is a limit that cannot meet all required specifications unless more advanced production and design techniques are added.

By improving the existing data cable structure under the production technology conditions as described above, it is possible to improve the frequency band of 100 MHz (or Mbps), which has been previously implemented, to the frequency band of up to 1200 MHz (or Mbps), and The aim is to achieve a result that makes it possible to achieve 100% of what was difficult to achieve perfectly at the sweep frequency with a circular intervening structure.

That is, the material is copper, the conductor is provided in a size divided into two groups in one cable assembly to change the electrical characteristics in accordance with the deviation of the diameter;

An insulator made of polyethylene, the material of which protects the conductor, serves to maintain a circular shape of the product, and is formed in one cable assembly, the outer core having a plurality of insulating cores;

A large portion for satisfying transmission characteristics by dividing the insulated product into two cores or more in one cable assembly to distinguish core arrangements, and having four pairs having different outer diameters;

A cross-shaped filler that separates each pair by dividing the cable core into four parts, maintains the arrangement of the pair, and acts as an overall shield for the core, and separates each pair into a cross shape to realize perfect transmission characteristics in any high frequency band;

An aggregation unit for grouping a product in association with the insulated product in a core unit or a pair unit or more;

The material is PVC, protects the insulator, and features a sheath that protects the insulator and the conductor by protecting the circular shape of the product and buffering mechanical and chemical shocks from the outside.

1 is a conventional Cat.6 UTP cable structure diagram.

Figure 2 is a Cat.6 UTP cable structure diagram of the present invention.

Figure 3 is a measurement result of the Cat 6, 4-pair cable to which the present invention is applied.

Explanation of symbols on the main parts of the drawings

10: conductor 20: insulator

30: great association 40: assembly

50: sheath 60: round filler

70: cross filler

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

The present invention compares the configuration of Cat.6, 4 pair data cable according to the conventional circular intervening and Cat.6, 4 pair data cable according to the present invention as an example, the overall configuration and structure, shape and appearance are similar. Do. The difference is the shape of the filler.

In other words, the filler of the present invention divides the cable core into quadrants to isolate each pair, maintains the arrangement of the pairs, and acts as an entire core shield, and separates each pair in a cross shape to realize perfect transmission characteristics in any high frequency band. Is to apply a cross-shaped filler.

In general, cable companies are pursuing differentiation of the market and quality of their products by self-specifying the core technology of data cable (eg, 4 pair) as follows.

The following is the list.

Configuration Design / Manufacturing Factor Core Manufacturing Technology Conductor Material, conductor diameter -Conductivity: 100% or more-Conductor Diameter Deviation: ± 0.002 Insulator Material, insulation outer diameter -HDPE (dielectric constant below 2.33)-Outer diameter deviation: ± 0.01-CMB amount: Within 5%-Insulator eccentricity: 95% or more Daeyeon -Pitch Array-Back Tension -Pitch selection by equivalent water supply (An = A0 * R)-Pitch deviation: Within ± 1%-Back Twist working condition-Minimize air gap between pairs set -Maintain geometric structure-set pitch -Square geometry maintenance-Effective pitch concept Sheath Maintain set array structure -Change of winding method: Bunch → Bo. Winding

Therefore, we devised and developed a product with a different structure but no problem at all, and developed a work method and conditions suitable for it, and developed a Cat.6 UTP type product that can exhibit the same level of electrical characteristics. We have accumulated manufacturing technology to produce Cat.6 UTP type products.

Before describing the most important electrical characteristics among the required quality characteristics of the Cat.6 UTP cable developed in the present invention, the electrical characteristics regulation items and characteristics of Cat.5 and Cat.6 are as follows.

UTP type Cat.5 Cat.6 Frequency band used Max.100MHz Max. 250 MHz Electrical characteristic item Spec. Spec. Zo 100 ± 15 (average) 100 ± 15 (individual value) ATT (dB / 100m) 100MHz250MHz 22 or less --- 20.2 or less 33.8 or less SRL (dB) 100MHz250MHz 16 or more 23.0 or more 15.3 or more NEXT (dB / 100m) 100MHz250MHz 32 or more --- 44.3 or more 38.3 or more P.D (ns / 100m) 100MHz250MHz 538 and below --- Below 538.0 Below 536.0 NEXT P / sumRLELFEXTELFEXT P / sACRPS ACRPD SkewLCLVP Unregulated Regulated

It can be seen from the above that the electrical characteristics of the Cat.6 type are not only twice as many as the regulation items, but also the specific value of each item requires better values than the Cat.5 type.

Most importantly, it must be satisfied at the sweep frequency as well as at the spot or representative frequency.

That is, the present invention is a copper material, the conductor 10 is provided in a size divided into two groups in one cable assembly to change the electrical characteristics according to the deviation of the diameter;

The insulator 20 is made of polyethylene, and protects the conductor, serves to maintain a circular shape of the product, and is built in one cable assembly, the insulator 20 having an outer diameter of a plurality of insulating cores;

A large edge portion 30 for grouping the insulated product into two or more cores in one cable assembly to distinguish core arrays, and having four pairs having different outer diameters to satisfy transmission characteristics;

Filler (60) for structurally stabilizing the phenomenon that the material is polyethylenes and the arrangement between the pair is separated or twisted during large work;

An assembly unit 40 for grouping the products insulated from the above insulated products into core units or pair units or more;

The material is PVC, and protects the insulator, and comprises a sheath body 50 to protect the insulator and the conductor by buffering the circular shape of the product and the mechanical and chemical shock applied from the outside.

Therefore, the effect of the cross-shaped filler developed in the present invention is a sufficient condition that the relationship between the structure and the electrical characteristics is necessary, by improving the production equipment and manufacturing technology for the development of the structure and the structure, the quality level as follows You have reached.

Among the electrical characteristics of the Cat.6 UTP cable, the most influential items on the data transmission quality are attenuation and crosstalk characteristics. The measurement results of the Cat.6 UTP cable developed according to the present invention are shown in FIG.

In addition, specifications of Attenuation, dB Loss, Near End Crosstalk (dB), and Attenuation Crosstalk Ratio (ACR), which are the items that can compare the difference between the product with round filler and the product with cross filler best If you compare by frequency, you can see the level difference as below chart.

[dB / 100m]

Frequency (MHz) Attenuation NEXT ACR circle Cross +/- circle Cross +/- circle Crosss +/- One 1.8 1.7 -0.1 84 93.5 9.5 82 92 10 8 5.0 4.9 -0.1 73 89 16 68 84 16 10 5.7 5.6 -0.1 65 75 10 59 69 10 20 8.1 7.9 -0.2 62 72 10 54 64 10 25 9.1 8.9 -0.2 62 72 10 53 63 10 31.3 10.3 10.2 -0.1 60 71 11 50 61 11 62.5 14.8 14.5 -1.3 50 59 9 35 45 9 100 19.0 18.8 -1.2 46 55 9 27 36 9 250 30.9 30.0 -0.9 48 58 10 17 28 11

The present invention made as described above has the following excellent characteristics.

-It is easy to handle because it is similar to the system of the cable which does not have the filler currently used in general purpose.

-Cable configuration is the same as cable without filler, so installation is easy.

-Bidirectional, all pairs transmission is possible.

The power criterion satisfies the specifications.

-Perfectly implements transmission characteristics in the frequency band up to 1200MHz (or Mbps).

-Providing the perfect answer in the expansion from Ethernet, Fast Ethernet to Gigabit Ethernet, which has already been proven in many fields.

-Can be applied simultaneously to cables with multi-pairs that are expected to be further developed.

Claims (1)

A material of copper, the conductor 10 being provided in one cable assembly divided into two groups and changing electrical characteristics according to a diameter variation; The insulator 20 is made of polyethylene, and protects the conductor, serves to maintain a circular shape of the product, and is built in one cable assembly, the insulator 20 having an outer diameter of a plurality of insulating cores; A large edge portion 30 for grouping the insulated product into two or more cores in one cable assembly to distinguish core arrays, and having four pairs having different outer diameters to satisfy transmission characteristics; A cross-shaped filler 70 that separates each pair by dividing the cable core into four parts, maintains the arrangement of the pair, and acts as an overall shield for the core, and separates each pair into a cross shape to realize perfect transmission characteristics in any high frequency band; An assembly unit 40 for grouping the products insulated from the above insulated products into core units or pair units or more; It is made of PVC material and protects the insulator, and includes a sheath body 50 to protect the insulator and the conductor by protecting the circular shape of the product and the mechanical and chemical shock applied from the outside. .