CN101430949B - Coaxial cable and method for producing the same - Google Patents
Coaxial cable and method for producing the same Download PDFInfo
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- CN101430949B CN101430949B CN2008102396794A CN200810239679A CN101430949B CN 101430949 B CN101430949 B CN 101430949B CN 2008102396794 A CN2008102396794 A CN 2008102396794A CN 200810239679 A CN200810239679 A CN 200810239679A CN 101430949 B CN101430949 B CN 101430949B
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Abstract
The invention discloses a coaxial cable and a method for manufacturing the coaxial cable, and aims at solving the problems of difficult fixing and mounting, and inconvenient laying of coaxial cables in the prior art. The method comprises the following steps: determining a first thickness of an inner copper conductor of an inner core layer in the coaxial cable, wherein, the first thickness is determined by frequency of a transmission signal in the coaxial cable and attribute information of the inner conductor; selecting a metal or a metal alloy with the density smaller than the inner conductor, and determining a second thickness of the metal or the metal alloy according to the thickness of the inner core layer in the coaxial cable and the first thickness; manufacturing the inner core layer according to the first thickness and the second thickness, wherein, the inner conductor is positioned on the outer layer of the metal or the metal alloy; and sequentially manufacturing an insulating layer and an outer skin layer on the outer layer of the inner conductor in the inner core layer. The proposal can help effectively reduce the weight of the coaxial cable, reduce the fixing and mounting difficulty of the coaxial cable, and facilitate the laying of the coaxial cable without changing the transmission signal quality of the coaxial cable.
Description
Technical field
The present invention relates to the mobile communication technology field, the method that relates in particular to a kind of coaxial cable and make coaxial cable.
Background technology
Along with the developing state of mobile communication universalness and diversification, higher demand has been proposed also in networking.The widely used feeder line of mobile communications industry all is copper basically at present.This is because copper has good electricity, machinery and thermal property.
Copper coaxial cable is that the weight ratio of feeder line is bigger, therefore, and to the installation of feeder line with higher requirement is fixedly arranged.Particularly for promoting the bigger project of feeder line demand, for example promote 3-G (Generation Three mobile communication system) (3rd Generation Mobile Communications System, 3G) synchronous code division multiple access (Time Division-Synchronous Code Division Multiple Access of time-division, TD-SCDMA) base station, it is than global system for mobile communications (Global System for Mobile communications, GSM) base station has been improved 9 times to the demand of feeder line, and its fixing and installation to feeder line is meanwhile just had higher requirement.
At present, the structure of the feeder line of using always in the mobile communication technology field as shown in Figure 1.This feeder line is generally layer structure, and its part mainly comprises from outside to inside: exodermis, insulating barrier, inner sandwich layer and air layer.Its exodermis is generally the metallic copper film, and insulating barrier is usually filled is dielectric material such as polyethylene, and inner sandwich layer is generally fine copper.
In the prior art,, increased that coaxial cable is fixed and mounting hardness, the laying of inconvenient coaxial cable because the quality of the copper that adopts in the coaxial cable is bigger.
Summary of the invention
In view of this, the method that the embodiment of the invention provides a kind of coaxial cable and makes coaxial cable, fixing big in order to solve the prior art standard coaxial cable with mounting hardness, the problem of being inconvenient to lay.
A kind of method of making coaxial cable that the embodiment of the invention provides, comprise: determine in the coaxial cable first thickness of copper inner wire in the inner sandwich layer, wherein, described first thickness is determined according to the frequency of transmission signals in the coaxial cable and the attribute information of described inner wire; Thickness and described first thickness according to inner sandwich layer in the described coaxial cable, determine second thickness of the metal or metal alloy that density is littler than described inner wire in the described inner sandwich layer, the ratio of first thickness of wherein copper inner wire and second thickness of metal or metal alloy is 1: 3; Make inner sandwich layer according to described first thickness and second thickness, wherein, described inner wire is positioned at the skin of described metal or metal alloy; Skin at inner wire described in the described inner sandwich layer is made insulating barrier and exodermis successively.
The method that the embodiment of the invention provides a kind of coaxial cable and made coaxial cable, at first need to determine in the coaxial cable first thickness of copper inner wire in the inner sandwich layer, and according to the thickness of inner sandwich layer in the described coaxial cable, and described first thickness, determine second thickness of the metal or metal alloy that density is littler than described inner wire in the described inner sandwich layer, make inner sandwich layer according to described first thickness and second thickness, and make insulating barrier and exodermis successively at the skin of inner wire described in this inner sandwich layer.Adopt the method for the making coaxial cable that the embodiment of the invention provides under the situation that does not change its signal transmission quality, effectively to alleviate the weight of coaxial cable, reduce that coaxial cable is fixed and mounting hardness, make things convenient for laying of coaxial cable.
Fig. 1 is the structural representation of prior art standard coaxial cable;
The method flow diagram of inner wire thickness in the making coaxial cable that Fig. 2 provides for the embodiment of the invention;
The structural representation of the coaxial cable that Fig. 3 provides for the embodiment of the invention.
In the embodiment of the invention, in the signal transmission quality that does not change coaxial cable, and effectively alleviate the weight of coaxial cable, as shown in Figure 2, provide a kind of method of making coaxial cable, specifically may further comprise the steps:
S201: determine in the coaxial cable first thickness of copper inner wire in the inner sandwich layer, wherein, described first thickness is according to the frequency of transmission signals in the coaxial cable, and the attribute information of described inner wire is determined.
Inner wire in this inner sandwich layer is generally copper.
S202: select the density metal or metal alloy littler,, reach described first thickness, determine second thickness of described metal or metal alloy according to the thickness of inner sandwich layer in the described coaxial cable than described inner wire.
This inner sandwich layer is made as comprises copper inner wire, and the form of the density metal or metal alloy combination littler than copper, can effectively alleviate the weight of inner sandwich layer, thereby alleviate the weight of coaxial cable.
Embodiment
Simultaneously, when this density metal or metal alloy littler of selecting, when price is more cheap than copper, can effectively reduce the cost of coaxial cable simultaneously than copper.
S203: make inner sandwich layer according to described first thickness and second thickness, wherein, described inner wire is positioned at the skin of described metal or metal alloy.
Wherein, metal or metal alloy is the internal layer of inner sandwich layer, and this metal or metal alloy and air layer are adjacent, and this copper inner wire is positioned at the skin of inner sandwich layer.
S204: the skin at inner wire described in the described inner sandwich layer is made insulating barrier and exodermis successively.
In embodiments of the present invention, this inner wire commonly used is copper, can certainly be other metal inner wire.This inner wire is positioned at the inner sandwich layer of coaxial cable, and the insulating barrier of this inner wire and coaxial cable is adjacent, and this inner sandwich layer can also comprise: other metal or metal alloy that density is little than this inner wire density.This metal or metal alloy and air layer are adjacent.
Adopt other little metal or metal alloy of this density and this inner wire inner sandwich layer, can effectively guarantee the stable degree of coaxial cable inner core as coaxial cable.When this density metal or metal alloy littler of selecting, when price is more cheap than copper, can effectively reduce the cost of coaxial cable simultaneously than copper.
The embodiment of the invention provides a kind of coaxial cable, this coaxial cable is by exodermis, insulating barrier, inner sandwich layer and air layer are formed, wherein, exodermis is the outermost layer of this coaxial cable, air layer is the innermost layer of this coaxial cable, insulating barrier is adjacent with the exodermis inner sandwich layer, inner sandwich layer is adjacent with the insulating barrier air layer, wherein, inner sandwich layer comprises copper inner wire, and the density metal or metal alloy littler than inner wire, this inner wire is positioned at the skin of inner sandwich layer, adjacent with insulating barrier, the metal or metal alloy that density is littler than inner wire is positioned at the internal layer of inner sandwich layer, and is adjacent with air layer, wherein the thickness of inner wire can be according to the frequency of transmission signals in the coaxial cable in the inner sandwich layer, and the attribute information of inner wire, determine the transmission thickness of described signal in described coaxial cable, determine the thickness of inner wire in the described inner sandwich layer according to described transmission thickness.
In coaxial cable, because the signal of transmission is generally high-frequency signal, when the inner wire of the inner sandwich layer of high-frequency signal by this coaxial cable, can think that this high-frequency signal only transmits in very thin one deck on the inner wire surface in inner sandwich layer, one deck and insulating barrier that this is very thin are adjacent.Promptly in coaxial cable, transmit in high-frequency signal one deck very thin in the inner sandwich layer inner wire, this layer is near the contact-making surface of inner sandwich layer inner wire and insulating barrier.And, the frequency of thickness of this layer and coaxial cable medium-high frequency signal, and the attribute information of inner wire is relevant, this thickness can be determined by following formula:
Wherein, δ is the thickness space scope of coaxial cable medium-high frequency signal transmission, and f is the frequency of coaxial cable medium-high frequency signal, and μ is the permeability of coaxial cable medium-high frequency signal inner wire, and σ is the conductivity of coaxial cable medium-high frequency signal inner wire.
According to above-mentioned formula as can be known, the transmission thickness space scope of its high-frequency signal is inversely proportional to the frequency of high frequency signals transmitted, when the transmission frequency of high-frequency signal hour, for identical inner wire, the thickness of its transmission signals is big more.
For example, for moving communicating field, when the frequency of this high-frequency signal was 100MHz, when its inner wire was copper, according to above-mentioned formula as can be known, the magnetic permeability of copper was μ ≈ μ
0≈ 4 π * 10
-7H/m, the conductivity of copper is σ=5.8 * 10
7Therefore S/m determines that transmission signals is 0.0067mm at the transmission thickness of inner sandwich layer, and when the frequency of this high-frequency signal was 5MHz, when its inner wire was copper, this transmission signals was 0.02996mm at the transmission thickness of inner sandwich layer.Can determine the thickness of copper inner wire according to this thickness, and according to the gross thickness of inner sandwich layer, determine the thickness of the metal or metal alloy that color density is littler than inner wire, thereby can make inner sandwich layer according to this inner wire and other density metal or metal alloy littler than inner wire.
Therefore as can be known, when the signal in the coaxial cable transmits in inner wire, because this signal is generally high-frequency signal, this inner wire is generally copper, according to the frequency of this high-frequency signal, reach the attribute information of inner wire copper, determine the transmission degree of depth of this high-frequency signal, according to the transmission degree of depth of this high-frequency signal, determine the thickness of coaxial cable inner core layer copper.And in order effectively to strengthen the steadiness of coaxial cable, adopt copper and other metals in this coaxial cable, or the alloy of copper and other metals is as its inner sandwich layer, wherein the thickness of copper is definite according to above-mentioned definite thickness in this heart layer.
Wherein, in order effectively to improve the quality of coaxial cable, and do not influence the coaxial cable signal transfer quality, other metals of selection can be the density metal or metal alloy little than copper, for example aluminium, titanium, zinc etc.As shown in Figure 3, this coaxial cable comprises exodermis, insulating barrier, copper inner sandwich layer, aluminium matter inner sandwich layer and air layer, wherein, exodermis is the outermost layer of this coaxial cable, air layer is the innermost layer of this coaxial cable, insulating barrier is adjacent with the exodermis inner sandwich layer, inner sandwich layer is adjacent with the insulating barrier air layer, and the copper inner sandwich layer in the inner sandwich layer is positioned at the skin of inner sandwich layer, adjacent with insulating barrier, the metallic aluminium matter inner sandwich layer that density in the inner sandwich layer is littler than copper is positioned at the internal layer of inner sandwich layer, and is adjacent with air layer.
In embodiments of the present invention, because in the coaxial cable of determining according to above-mentioned formula, the degree of depth in the transmission course of high-frequency signal as can be known, its degree of depth is generally less, therefore can be in the coaxial cable inner core layer, density can be greatly than the degree of depth of the alloy of little metal of copper or metal.Preferable, for example in this coaxial cable inner core layer, the depth ratio of copper and other metal or metal alloy little than its density, or to be called the thickness ratio be 1: 3 etc., for example in inner sandwich layer, copper is 1: 3 with the thickness ratio of aluminium.
It can certainly be other proportionality coefficient; as long as can guarantee that the high frequency signals transmitted quality is not affected in the coaxial cable; determine the transmission degree of depth of high-frequency signal in the inner wire of coaxial cable according to above-mentioned formula; thereby the method for the thickness of the metal or metal alloy that inner wire and this inner wire of color density are little in definite coaxial cable inner core layer all should be in protection scope of the present invention.
Embodiment one:
In embodiments of the present invention, the inner wire of coaxial cable inner core layer is a copper, when the frequency of high frequency signals transmitted is 15MHz, and basis then
The transmission degree of depth of this high-frequency signal in the copper of inner sandwich layer is 0.02119mm as can be known.
In this coaxial cable, the thickness of determining this inner sandwich layer inner wire copper is 2mm etc.
Perhaps, in this coaxial cable, its inner sandwich layer is made of copper cover aluminum, and be 1: 3 principle according to the thickness of copper and aluminium, determine the thickness of copper and aluminium in this inner sandwich layer, according to the thickness making inner sandwich layer of the copper of determining with aluminium, and the skin of inner sandwich layer is made as copper, internal layer is made as aluminium.
Embodiment two:
In embodiments of the present invention, the inner wire of coaxial cable inner core layer is a copper, when the frequency of coaxial cable medium-high frequency signal is 1750MHz, and basis then
The transmission degree of depth of this high-frequency signal in the copper of inner sandwich layer is 1.8163 * 10 as can be known
-4
In this coaxial cable, its inner sandwich layer is made of the copper-clad kirsite, is 1: 5 principle according to the thickness of copper and alloy, determine the thickness of copper and kirsite in this inner sandwich layer, thickness according to copper of determining and aluminium is made inner sandwich layer, and the skin of inner sandwich layer is made as copper, and internal layer is made as aluminium.
Other are than the little metal or metal alloy of inner wire density and inner wire during as the inner sandwich layer of coaxial cable, frequency according to high-frequency signal, and the attribute information of inner wire as can be known, the thickness of the transmission of this high-frequency signal in coaxial cable, thereby the thickness of inner wire in the inner sandwich layer in definite this coaxial cable, and the thickness of other metal or metal alloy little than inner wire density.Just do not give unnecessary details one by one in embodiments of the present invention, believe the implementation that those skilled in the art can provide according to the embodiment of the invention, be implemented in the thickness of determining inner wire and other metal or metal alloy little in the inner sandwich layer in this coaxial cable than inner wire density.
When the metal littler than copper inner wire of density in the inner sandwich layer of this coaxial cable is aluminium, because the price of aluminium is more cheap than copper, therefore, can be when alleviating coaxial cable weight, can reduce the cost of investment of buying coaxial cable, thereby reduce the cost of investment of base station engineering construction.
The method that the embodiment of the invention provides a kind of coaxial cable and made coaxial cable, at first need to determine in the coaxial cable first thickness of copper inner wire in the inner sandwich layer, and according to the thickness of inner sandwich layer in the described coaxial cable, and described first thickness, determine second thickness of the metal or metal alloy that density is littler than described inner wire in the described inner sandwich layer, make inner sandwich layer according to described first thickness and second thickness, and make insulating barrier and exodermis successively at the skin of inner wire described in this inner sandwich layer.Adopt the method for the making coaxial cable that the embodiment of the invention provides under the situation that does not change its signal transmission quality, effectively to alleviate the weight of coaxial cable, reduce that coaxial cable is fixed and mounting hardness, make things convenient for laying of coaxial cable.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (3)
1. a method of making coaxial cable is characterized in that, comprising:
Determine in the coaxial cable first thickness of copper inner wire in the inner sandwich layer, wherein, described first thickness is determined according to the frequency of transmission signals in the coaxial cable and the attribute information of described inner wire;
Select the density metal or metal alloy littler than described inner wire, thickness and described first thickness according to inner sandwich layer in the described coaxial cable, determine second thickness of described metal or metal alloy, the ratio of first thickness of wherein copper inner wire and second thickness of metal or metal alloy is 1: 3;
Make inner sandwich layer according to described first thickness and second thickness, wherein, described inner wire is positioned at the skin of described metal or metal alloy;
Make the insulating barrier and the exodermis of coaxial cable successively at the skin of inner wire described in the described inner sandwich layer.
2. the method for claim 1 is characterized in that, the metal that described density is littler than described inner wire comprises:
Aluminium, zinc or titanium.
3. the method for claim 1 is characterized in that, described first thickness is according to the frequency of transmission signals in the coaxial cable, and the attribute information of inner wire copper is determined to comprise:
According to
Determine first thickness, wherein, δ is first thickness of inner wire in the inner sandwich layer in the coaxial cable, and f is the frequency of transmission signals in the coaxial cable, the permeability of μ inner wire, and σ is the conductivity of inner wire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102396794A CN101430949B (en) | 2008-12-15 | 2008-12-15 | Coaxial cable and method for producing the same |
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| CN2008102396794A CN101430949B (en) | 2008-12-15 | 2008-12-15 | Coaxial cable and method for producing the same |
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| CN101430949A CN101430949A (en) | 2009-05-13 |
| CN101430949B true CN101430949B (en) | 2011-03-30 |
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| US20160307666A1 (en) * | 2013-12-02 | 2016-10-20 | Fujikura Ltd. | High-frequency wire and coil |
| CN103871687A (en) * | 2014-03-13 | 2014-06-18 | 苏州科茂电子材料科技有限公司 | Preparation method of novel micro coaxial cable |
| CN105632634A (en) * | 2016-04-11 | 2016-06-01 | 湖南华菱线缆股份有限公司 | Wire and cable for aerospace |
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| CN87213335U (en) * | 1987-09-15 | 1988-06-29 | 石油部管道局通信处 | Spreading copper steel-core radio frequency coaxial cable |
| US5959245A (en) * | 1996-05-30 | 1999-09-28 | Commscope, Inc. Of North Carolina | Coaxial cable |
| CN1513190A (en) * | 2001-06-08 | 2004-07-14 | �ʼҷ����ֵ�������˾ | Radio frequency suppressing cable |
| CN2916861Y (en) * | 2006-04-17 | 2007-06-27 | 江苏兴荣高新科技股份有限公司 | Copper-clad aluminum coaxial cable |
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