CN101136263A

CN101136263A - Coaxial cable

Info

Publication number: CN101136263A
Application number: CNA200610037345XA
Authority: CN
Inventors: 寿伟春; 邹智; 刘哲
Original assignee: ZHUHAI HANSEN INDUSTRIES Corp
Current assignee: ZHUHAI HANSEN INDUSTRIES Corp
Priority date: 2006-08-29
Filing date: 2006-08-29
Publication date: 2008-03-05

Abstract

This invention relates to a kind of coaxial cables including an internal conductor extending along a longitudinal axis, an insulation material, an outer conductor and a jacket orderly placed from inside, in which, said insulation material isolates the internal and outer conductors characterizing that Al ribbon is taken as the backing of the outer conductor, a layer of nickel is plated on the backing and then the copper material is taken as a coating to be wrapped on the Al ribbon.

Description

A kind of coaxial cable

Technical field

The present invention relates to communication field, relate in particular to a kind of coaxial cable.

Background technology

In recent years, the global system for mobile telecommunications technical development is swift and violent, and China's mobile communication technology means also develop into GSM, cdma system by analogue system gradually, and the construction of a large amount of mobile communication base stations makes the market demand of 50 ohm coaxial cable increasing.Because 50 ohm coaxial cable manufacture difficulty are big, domestic only have a manufacturer production few in number, differently produce the products that family produces and have their own characteristics each, but the technological means of basic principle and employing is roughly the same.50 ohm coaxial cable mainly are made up of inner wire, insulation, wrinkled external conductor, sheath four major parts.Inner and outer conductor is placed on the same axis line, middle separates with low-loss insulating material, with the fixing coaxial position of inner and outer conductor, prevents that it from contacting with each other the decay that reduces coaxial cable simultaneously.In order to obtain necessary mechanical performance (especially flexibility) and electric property, very The key factor is that wrinkled external conductor is optimized.The wrinkled external conductor that uses mostly is made of copper at present, and is relatively large to the extruding of insulation, inner wire because copper strips wrinkled external conductor proportion is bigger, also is inconvenient to transport and set up.

Summary of the invention

The present invention has overcome shortcoming of the prior art, and a kind of novel coaxial cable is provided, characteristics such as that the outer conductor of this novel coaxial cable has is in light weight, good conductivity, intensity is higher, price is low.

In order to solve the problems of the technologies described above, be achieved through the following technical solutions:

A kind of novel coaxial cable, it comprises an inner wire from inside to outside successively, it extends along the longitudinal axis of cable; One insulating material, an outer conductor and sheath, this insulating material separates inner and outer conductor, it is characterized in that, this outer conductor is the copper-clad aluminium strip, and it is to be base material with the aluminium strip, plating one deck nickel on this aluminium strip base material, again with copper material as coating, be wrapped in outside the aluminium strip in the mode of electroplating.

Coaxial cable of the present invention has changed existing coaxial cable outer conductor material and structure, replace original single copper strips with the copper-clad aluminium strip, because copper-clad aluminium strip proportion is little, the biggest advantage of making wrinkled external conductor of the copper-clad aluminium strip is lighter by about 60% under same length than fine copper band, brings great convenience can for like this transportation and the erection construction of cable.Simultaneously, much smaller relatively because copper-clad aluminium strip wrinkled external conductor wants light a lot of to the extruding of insulation, inner wire, help to improve the long-time stability of cable.In addition, the copper-clad aluminium strip is than fine copper band softness, so more many than the cable softness of fine copper band production with the cable of copper-clad aluminium strip production, bending property is more excellent.Doing the wrinkled external conductor material with the copper-clad aluminium strip, to also have a social benefit be to save a large amount of copper materials.Because All Around The World scope, aluminum ore are very abundant, copper mine has just lacked relatively, and particularly in China, the copper resource is very nervous.

Description of drawings

Fig. 1 is the sectional view of coaxial cable of the present invention.

Embodiment

Referring to Fig. 1, be the sectional view of coaxial cable of the present invention, it comprises an inner wire 1 from inside to outside successively this coaxial cable, it extends along the longitudinal axis of cable; Interior thin layer 2, insulating barrier 3, outer thin layer 4, outer conductor 5 and sheath 6, this insulating barrier 3 separate inner and outer conductor, and this outer conductor 5 is the copper-clad aluminium strip, and it is to be base material with the aluminium strip, and copper material as coating, is wrapped in outside the aluminium strip in the mode of electroplating.

Following table is the performance comparison of copper-clad aluminium strip outer conductor of the present invention and fine copper band outer conductor:

Title	The copper-clad aluminium strip	The fine copper band
Title	The copper-clad aluminium strip	The fine copper band	Tensile strength, MPa	≥135	195～250
Percentage elongation, %	≥25	≥35	Tensile strength, MPa	≥135	195～250
Percentage elongation, %	≥25	≥35	Density, g/cm ³	3.20	8.89
The copper layer accounts for the area ratio of whole band, %	8～10	/	Density, g/cm ³	3.20	8.89
	8～10	/	Resistivity, Ω .mm ²/m	0.027500	0.017241

After outer conductor 5 made the wrinkle shape, just added a layer of air between insulating barrier 3 and outer conductor 5 effective diameters, thereby can improve foam degrees, can also obtain good mechanical performance, the stability of cable is also more excellent.The key condition of the manufacturing process of wrinkle copper-clad aluminium strip outer conductor is the welding current and the linear velocity of copper-clad aluminium strip, and to different specifications and models products, welding current is 100～190A, and linear velocity is 8～25m/min.The structure of wrinkled external conductor is mainly by 4 parameter decisions: outer conductor diameter, wrinkle depth, wrinkle pitch and copper strips thickness.

With regard to design, the effective diameter of outer conductor is a preset parameter, knows by the analysis that external conductor structure and decay, flexibility concern, when increasing wrinkle depth and reducing the wrinkle pitch, decay is tending towards rising, and electric property is excellent; When reducing wrinkle depth and increasing the wrinkle pitch, the bending radius of cable is little, and flexibility is excellent.Copper-clad aluminium strip of the present invention has guaranteed even, the neat and minimum size fluctuation of annular wrinkle, makes cable when the bending property change is excellent, and electricity function index also is improved.Simultaneously, adopt the production of copper-clad aluminium strip to make cable have unique flexibility, can reduce decay and SRL that wire jumper and connector bring, the combination property of cable is more excellent.

The utility model wrinkle copper-clad aluminium strip outer conductor antenna cable is by the improvement of outer conductor wrinkle size and outer conductor material, make cable obtain good electric property and mechanical performance, simultaneously, the cost of transportation of cable, installing rack are set as this capital and decrease, being very easy to selecting for use of user, is excellent novel 50 ohm coaxial cable of a kind of cost performance.

Above step is the unrestricted technical scheme of the present invention in order to explanation only.Any modification or partial replacement that does not break away from spirit and scope of the invention all should be encompassed in the middle of the claim scope of the present invention.

Claims

1. coaxial cable, it comprises an inner wire from inside to outside successively, it extends along the longitudinal axis of cable; One insulating material, an outer conductor and sheath, this insulating material separates internal and external conductor, it is characterized in that, and this outer conductor is the copper-clad aluminium strip, and it is to be base material with the aluminium strip, and copper material as coating, is wrapped in outside the aluminium strip in the mode of electroplating.

2. coaxial cable according to claim 1 is characterized in that, also is coated with one deck nickel between described copper material and aluminium.

3. coaxial cable according to claim 1 is characterized in that, described copper material layer account for whole copper cover aluminum zone face long-pending 8%～10%.