KR20100089395A

KR20100089395A - Coaxial cable and structure of a plurality of coaxial cables

Info

Publication number: KR20100089395A
Application number: KR1020090008617A
Authority: KR
Inventors: 정환택
Original assignee: (주)세명; 정환택
Priority date: 2009-02-03
Filing date: 2009-02-03
Publication date: 2010-08-12

Abstract

The present invention is an inner conductor formed of copper clad aluminum wire, an insulator surrounding the inner conductor, an outer conductor surrounding the insulator and formed by braiding a plurality of CCA wires, and the outer A coaxial cable is provided that includes a cable jacket surrounding a conductor.

Therefore, since the inner conductor and the outer conductor are formed using the CCA wire, not only the manufacturing cost can be reduced, but also the problem of corrosion of the outer conductor can be solved.

Description

Coaxial cable and structure of a multiple of coaxial cables}

The present invention relates to coaxial cables and coaxial cable structures, and more particularly, to coaxial cables and coaxial cable structures having low manufacturing costs and improved corrosion resistance.

Conventional coaxial cable includes a copper wire, an insulator surrounding the copper wire, an outer conductor formed by wrapping the insulator and braiding aluminum wires, and a sheath surrounding the outer conductor.

However, the cost of the copper wire is not only very high, but the aluminum wires have a problem of low corrosion resistance and high durability of the coaxial cable.

An object of the present invention is to provide a coaxial cable and a coaxial cable structure having low manufacturing cost and improved corrosion resistance.

The present invention is formed by forming an inner conductor formed of copper clad aluminum (hereinafter referred to as "CCA") wire, an insulator surrounding the inner conductor, and surrounding the insulator and braided with a plurality of CCA wires. It provides an outer conductor, and a coaxial cable comprising a cable jacket surrounding the outer conductor.

In the present invention, the coaxial cable may further include a shielding tape inserted between the insulator and the inner conductor and formed of a thin film material including an aluminum material.

In addition, in the present invention, the inner conductor may be formed of a plurality of CCA wires. The insulator may be formed of polyethylene or foamed polyethylene, and the cable jacket may be formed of PVC or polyethylene.

According to another aspect of the present invention, the present invention provides a coaxial cable structure comprising an outer cable jacket and the coaxial cable plurally inserted into the outer cable jacket.

In the present invention, the color of the cable jacket of the plurality of coaxial cables may be different from each other. In addition, the plurality of coaxial cables may extend while being twisted with each other along the longitudinal direction of the coaxial cable. The coaxial cable structure may further include a fixing member wound in a spiral direction along the longitudinal direction of the twisted coaxial cables to fix the coaxial cables in the outer cable jacket and formed in a nonwoven fabric.

The coaxial cable structure may further include an outer shield member inserted between the outer cable jacket and the plurality of coaxial cables and formed of a fabric structure.

In the coaxial cable and coaxial cable structure according to the invention, the inner and outer conductors can be formed using CCA wires. Therefore, not only the manufacturing cost can be reduced, but also the problem of corrosion of the outer conductor can be solved.

If the outer jacket of the coaxial cables in the coaxial cable structure is different in color, the discrimination of the coaxial cables becomes easy, and the creationability is improved.

1 and 2 illustrate a coaxial cable 100 according to one embodiment of the invention. 1 is a partially cutaway perspective view of the coaxial cable 100, and FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

1 and 2, the coaxial cable 100 includes an inner conductor 110, an insulator 120, a shielding tape 130, an outer conductor 140, and a cable jacket 150. The inner conductor 110 transmits electric / propagation signal energy. The inner conductor 110 is formed of a CCA wire. The CCA wire has a structure in which copper 112 is coated on the aluminum wire 111. Since the CCA wire has a constant outer diameter and uniform surface roughness, characteristics such as insertion loss, impedance, voltage standing wave ratio, and return loss are much better than those of general copper wire. Moreover, since the CCA wire is very low in price compared to a general copper wire, the manufacturing cost of the coaxial cable 100 is greatly lowered.

The insulator 120 insulates the inner conductor 110 from the outside. Since the insulator 120 is made of polyethylene, there is an advantage in that manufacturing is simple and low cost. However, when pores are formed by injecting gas (Gas) in the manufacturing process of the insulator 120, the polyethylene becomes foamed polyethylene and thus the characteristics of the coaxial cable 100 are further improved.

The shielding tape 130 is adhesively fixed to an outer surface of the inner conductor 110 and is formed of a thin film material including an aluminum material. However, the shielding tape 130 may not be attached to the outer surface of the inner conductor 110. The shielding tape 130 shields the inner conductor 110 from the outside so that the electric / radio signal energy is propagated in the longitudinal direction. However, the structure and material of the shielding tape 130 is not limited to the above.

The outer conductor 140 surrounds the shielding tape 130. Similar to the shielding tape 130, the outer conductor 140 also shields the inner conductor 110 from the outside to allow the electric / propagation signal energy to propagate in the longitudinal direction. That is, the shielding tape 130 performs the primary shielding function, and the outer conductor 140 performs the secondary shielding function.

The outer conductor 140 is formed by braiding a plurality of CCA wires 141. Conventional aluminum braids are very susceptible to corrosion. Accordingly, moisture penetrates into the stripped portion of the cable jacket, causing corrosion of the aluminum braid. Due to the corrosion, there is a problem that not only the mechanical durability of the coaxial cable, but also the electrical characteristics deteriorate. However, in the present embodiment, since the outer conductor 140 is formed of CCA wires 141, the corrosion resistance of the outer conductor 140 is greatly improved by the copper coating. In addition, the electrical properties of the CCA wire 141 is improved, and specific details of cost reduction may be referred to the foregoing.

The CCA wire 141 has a lower tensile strength than the link line. Therefore, tension control should be well maintained in the braiding process. In addition, the cable jacket 150 is formed to surround the outer conductor. The cable jacket 150 is made of PVC, polyethylene, the production is simple, the manufacturing cost is low.

Referring to FIG. 3, there is shown a partial cutaway perspective view of a coaxial cable 200 according to another embodiment of the present invention. The coaxial cable 200 includes an inner conductor 210, an insulator 220, a shielding tape 230, an outer conductor 240, and a cable jacket 250. The inner conductor 220 is formed of a plurality of CCA wires. Each CCA wire has a structure in which the outer surface of the aluminum wire 211 is covered with copper 212. Therefore, by controlling the number of CCA wires, the electrical and radio wave characteristics of the coaxial cable 200 can be adjusted. For example, instead of changing the outer diameter of the CCA wire every time the standard of the coaxial cable is changed, the number of CCA wires having the same outer diameter can be changed to correspond to the change of the standard of the coaxial cable. Moreover, even if some of the CCA wires are broken, the rest may transmit electric / propagating signal energy.

Other components are similar to those of the above-described embodiment, and thus a detailed description thereof will be omitted.

4 and 5 illustrate a coaxial cable structure 500 according to another embodiment of the present invention. 4 is a partial cutaway perspective view of the coaxial cable structure 500, and FIG. 5 is a cross-sectional view taken along the line VV of FIG.

4 and 5, the coaxial cable structure 500 includes four coaxial cables 501, 502, 503, 504, a fixing member 560, and an outer cable jacket 570. The structure and function of each of the coaxial cables 501, 502, 503, and 504 are similar to the structure and function of the coaxial cable 100 of the above-described embodiment, and thus detailed description thereof will be omitted. However, each of the coaxial cables 501, 502, 503, and 504 may also have a structure and a function of the coaxial cable 200 of another embodiment. By the one coaxial cable structure 500, since a plurality of coaxial cables 501, 502, 503, 504 can be used, the installation appearance is very excellent effect.

The outer cable jacket 570 is hollow inside, and is formed of various materials such as PVC. The coaxial cables 501, 502, 503, 504 extend while being twisted together in the longitudinal direction. The fixing member 560 has a non-woven tape structure, and is wound in a spiral direction along the longitudinal direction of the twisted coaxial cables 501, 502, 503, and 504. By the fixing member 560, the coaxial cables 501, 502, 503, 504 are fixed in the outer cable jacket 570.

The color of the cable jacket of the coaxial cables 501, 502, 503, 504 is different from each other. Therefore, the operator can easily distinguish the coaxial cables (501, 502, 503, 504) from each other, there is an effect that the installation work is very easy.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a partial cutaway perspective view of a coaxial cable according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

3 is a partial cutaway perspective view of a coaxial cable according to another embodiment of the present invention.

4 is a partially cutaway perspective view of a coaxial cable structure according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4.

100, 200, 501, 502, 503, 504: coaxial cable

110, 210: inner conductor 120, 220: insulator

130, 230: shielding tape 140, 240: outer conductor

150, 250: cable jacket 560: fixing member

570: outer cable jacket

Claims

An inner conductor formed of copper clad aluminum (hereinafter referred to as "CCA") wire;

An insulator surrounding the inner conductor;

An outer conductor surrounding the insulator and formed by braiding a plurality of CCA wires; And

A coaxial cable comprising a cable jacket surrounding the outer conductor.

The method according to claim 1,

And a shielding tape inserted between the insulator and the inner conductor and formed of a thin film material including an aluminum material.

The method according to claim 1,

And the inner conductor is formed of a plurality of CCA wires.

The method according to claim 1,

The insulator is formed of polyethylene or foamed polyethylene, and the cable jacket is formed of PVC or polyethylene.

Outer cable jacket; And

A coaxial cable structure comprising the coaxial cable of any one of claims 1 to 5 inserted into a plurality of outer cable jackets.

The method according to claim 5,

And a color of the cable jacket of the plurality of coaxial cables.

The method according to claim 5,

The plurality of coaxial cables extend while being twisted with each other along the longitudinal direction of the coaxial cable,

The coaxial cable structure,

And a fixing member wound in a spiral direction along the longitudinal direction of the twisted coaxial cables to fix the coaxial cables in the outer cable jacket and formed in a nonwoven fabric.