CN206584749U - A kind of coaxial radio frequency cable - Google Patents
A kind of coaxial radio frequency cable Download PDFInfo
- Publication number
- CN206584749U CN206584749U CN201620916934.4U CN201620916934U CN206584749U CN 206584749 U CN206584749 U CN 206584749U CN 201620916934 U CN201620916934 U CN 201620916934U CN 206584749 U CN206584749 U CN 206584749U
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- Prior art keywords
- layer
- radio frequency
- screen layer
- insulating barrier
- frequency cable
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Abstract
The utility model provides a kind of coaxial radio frequency cable, including inner wire, insulating barrier, first screen layer, secondary shielding layer and oversheath；The periphery of inner wire is insulating barrier, and the periphery of insulating barrier is first screen layer, and the periphery of first screen layer is secondary shielding layer, and the periphery of secondary shielding layer is oversheath；Inner wire forms for many silver-coated copper wires are stranded, and first screen layer is aluminium foil, and secondary shielding layer is copper mesh screen layer, and copper mesh screen layer is formed by many tinned wird braidings.The utility model can reduce signal attenuation in high-frequency transmission, well the extraneous electromagnetic interference of barrier, the shielding properties of cable be improved, so as to improve communication quality.
Description
Technical field
The utility model is related to technical field of electric wires and cables, more particularly, to a kind of coaxial radio frequency cable.
Background technology
Radio-frequency cable be transmit radio-frequency region in electromagnetic energy cable, radio-frequency cable be various radio communications systems and
Indispensable element in electronic equipment, has in terms of radio communication with broadcast, TV, radar, navigation, computer and instrument
It is widely applied.Coaxial radio frequency cable is the most frequently used structural shape, and its internal and external conductor is in concentric position, electromagnetic energy limitation
Media between internal and external conductor.With the support of China's rapid economic development and relevant policies, following China moves
The industries such as dynamic communication, microwave communication, communication terminal, military electronic, Aero-Space are by fast development, to the need of coaxial radio frequency cable
Rapid growth will also be kept by asking, while the requirement more and more higher to coaxial radio frequency cable, should ensure that it has good transmission
Performance, mechanical performance and shielding properties, require simple in construction, with low cost again.
The inner wire of existing coaxial radio frequency cable uses fine copper or tinned copper conductor, and its resistivity is larger, the resistivity of copper
For 0.017241 Ω mm2/ m, the resistivity of tin-coated copper is 0.01802 Ω mm2/ m, thus causes the attenuation constant of cable also to compare
Greatly, the increase of frequency higher its attenuation constant is also more notable, is restricted using bandwidth, be also exactly the shielding properties of outer conductor not
It is good, therefore to there is signal attenuation obvious and anti-interference during high frequency electrical signal is transmitted for existing radio-frequency cable
The problem of performance is weaker so that communication quality is than relatively low.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of coaxial radio frequency cable, can be dropped in high-frequency transmission
Low signal attenuation, the extraneous electromagnetic interference of barrier, improves the shielding properties of cable, so as to improve communication quality well.
In a first aspect, the utility model embodiment provides a kind of coaxial radio frequency cable, including inner wire, insulating barrier, the
One screen layer, secondary shielding layer and oversheath；
The periphery of the inner wire is the insulating barrier, and the periphery of the insulating barrier is the first screen layer, described the
The periphery of one screen layer is the secondary shielding layer, and the periphery of the secondary shielding layer is the oversheath；
The inner wire forms for many silver-coated copper wires are stranded, and the first screen layer is aluminium foil, the secondary shielding layer
For copper mesh screen layer, the copper mesh screen layer is formed by many tinned wird braidings.
With reference in a first aspect, the utility model embodiment provides the first possible embodiment of first aspect, institute
Insulating barrier is stated for polyethylene layer.
With reference to the first possible embodiment of first aspect, the utility model embodiment provides the of first aspect
Two kinds of possible embodiments, the insulating barrier is to be foamed the insulating barrier to be formed using physical blowing principle.
With reference in a first aspect, the utility model embodiment provides the third possible embodiment of first aspect, institute
Oversheath is stated for pvc sheath.
With reference to the third possible embodiment of first aspect, the utility model embodiment provides the of first aspect
Four kinds of possible embodiments, the thickness of the oversheath is 1.2~1.5mm.
With reference in a first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect, institute
The external diameter for stating inner wire is 1.3mm.
With reference in a first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect, institute
It is not less than 90% to the coverage rate of the insulating barrier to state first screen layer.
With reference in a first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect, institute
State a diameter of 0.2mm of silver-coated copper wire.
With reference in a first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect, institute
The silver coating thickness for stating silver-coated copper wire is 0.01mm~0.02mm.
With reference in a first aspect, the utility model embodiment provides the 9th kind of possible embodiment of first aspect, institute
The tin coating thickness for stating tinned wird is 0.01mm~0.02mm.
The utility model provides a kind of coaxial radio frequency cable, including inner wire, insulating barrier, first screen layer, the second screen
Cover layer and oversheath；The periphery of inner wire is insulating barrier, and the periphery of insulating barrier is first screen layer, and the periphery of first screen layer is
Secondary shielding layer, the periphery of secondary shielding layer is oversheath；Inner wire, which is that the silver-plated copper cash of many root surfaces is stranded, to be formed, the first screen
Layer is covered for aluminium foil, secondary shielding layer is copper mesh screen layer, copper mesh screen layer is formed by the tin plating copper wire woven of many root surfaces.Due to
The conductance of silver is 105.2%, and the conductance of copper is 100%, according to Kelvin effect, replaces pure copper wire can be with silver-coated copper wire
Attenuation constant is effectively reduced in high-frequency transmission, so as to reduce signal attenuation, barrier can be very good using two-layer screen layer
Extraneous electromagnetic interference, improves the shielding properties of cable, so as to improve communication quality.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
A kind of coaxial radio frequency cable schematic diagram that Fig. 1 provides for the utility model embodiment.
Reference：
1- inner wires；2- insulating barriers；
3- first screen layers；4- secondary shielding layers；
5- oversheaths.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
There is signal attenuation for coaxial radio frequency cable in the prior art obvious, and interference free performance is weaker so that
Communication quality than it is relatively low the problem of, the utility model provides a kind of coaxial radio frequency cable, including inner wire, insulating barrier, first
Screen layer, secondary shielding layer and oversheath；The periphery of inner wire is insulating barrier, and the periphery of insulating barrier is first screen layer, first
The periphery of screen layer is secondary shielding layer, and the periphery of secondary shielding layer is oversheath；Inner wire is the silver-plated copper cash of many root surfaces
Stranded to form, first screen layer is aluminium foil, and secondary shielding layer is copper mesh screen layer, and copper mesh screen layer is by the tin plating copper of many root surfaces
Line braiding is formed.Because the conductance of silver is 105.2%, the conductance of copper is 100%, according to Kelvin effect, uses silver-coated copper wire
Attenuation constant can be effectively reduced in high-frequency transmission instead of pure copper wire, so that signal attenuation is reduced, using two layers of shielding
Layer can be very good the extraneous electromagnetic interference of barrier, the shielding properties of cable be improved, so as to improve communication quality.Below by reality
Example is applied to be described in detail.
A kind of coaxial radio frequency cable schematic diagram that Fig. 1 provides for the utility model embodiment.
Reference picture 1, coaxial radio frequency cable includes inner wire 1, insulating barrier 2, first screen layer 3, secondary shielding layer 4 and outer shield
Set 5；
The periphery of the inner wire 1 is the insulating barrier 2, and the periphery of the insulating barrier 2 is the first screen layer 3, institute
The periphery for stating first screen layer 3 is the secondary shielding layer 4, and the periphery of the secondary shielding layer 4 is the oversheath 5；
Specifically, the shielding character of coaxial radio frequency cable is a parameter for weighing coaxial radio frequency cable antijamming capability,
It is also an important parameter for weighing coaxial radio frequency cable anti-leak.Screen layer plays an important role to shielding properties, Er Qie
In centrally connected power supply catv line or power supply return line, also preventing external open circuit signaling from disturbing and cable TV signal
Obscure aspect to play an important roll.
The inner wire 1 forms for many silver-coated copper wires are stranded, and the first screen layer 3 is aluminium foil, the secondary shielding
Layer 4 is copper mesh screen layer, and the copper mesh screen layer is formed by many tinned wird braidings.
Specifically, inner wire 1 effectively can reduce signal attenuation using silver-coated copper wire in high-frequency transmission, be kept pouring according to height
Defeated Kelvin effect is theoretical, i.e., when power frequency (50~60HZ) electric current flows through conductor, the current density of conductors cross is in almost
Uniform state is distributed, and when the frequency of electric current increases, the density that its electric current flows through conductors cross changes, conductors cross
The electric current that flows through at center is reduced, and the electric current increase flowed through by the outside circular direction of kernel of section, and the more high this phenomenon of frequency is brighter
Aobvious, when power frequency reaches 1MHZ, electric current almost all is concentrated in a certain thickness of conductive surface, and conductor core does not have
Electric current passes through, and this phenomenon is Kelvin effect.The conductance of silver is 105.2%, and the conductance of copper is 100%, according to the skin that becomes
Effect, pure cu conductor is replaced with silver-coated copper wire, attenuation constant is just significantly reduced in high-frequency transmission, so as to reduce signal
Decay.
According to exemplary embodiment of the present utility model, the insulating barrier 2 is polyethylene layer.
Specifically, polyethylene (polyethylene, abbreviation PE) is a kind of aggregated obtained thermoplastic resin of ethene.
Industrially, the also copolymer including ethene Yu a small amount of alpha-olefin.Polyethylene odorless, nontoxic, feel ceraceous, with excellent resistance to low
Warm nature energy (minimum reachable -100~-70 DEG C of temperature in use), chemical stability is good, is resistant to the erosion of most of soda acids (intolerant to tool
The acid of oxidizing matter).Common solvent is not dissolved under normal temperature, water imbibition is small, and electrical insulating property is excellent.Insulation is used as using polyethylene
Layer, it is strong, non-fusible, resistant to chemical etching with simple in construction, lightweight, heat-resisting good, load capacity, the advantages of high mechanical strength.
According to exemplary embodiment of the present utility model, the insulating barrier 2 foams to be formed using physical blowing principle
Insulating barrier.
Specifically, cellular insulation is a kind of primary structure pattern that communication cable uses half air insulation structure, and it has
Flexibility is good, the advantages of easy to use, and cellular insulation is small, lightweight, fewer using insulating materials than solid insulation decay, and does not have
There is the maintenance by gas pressuriztion of air insulation structure, easily invaded by moisture.Physical blowing is passed through by injecting inert gas
Nucleator formation foam is crossed, to obtain a kind of method of cellular insulation structure, this structure makes insulation have effective dielectric constant,
And have the advantages that uniformity is good, dielectric loss is small, Stability Analysis of Structures.
According to exemplary embodiment of the present utility model, the oversheath 5 is pvc sheath.
Specifically, polyvinyl chloride (Polyvinyl chloride, PVC), is VCM (vinyl chloride
Monomer, VCM) in initiators such as peroxide, azo-compounds, or by mechanism of free-radical polymerization under light, heat effect
The polymer being polymerized.Polyvinyl chloride has fire-retardant (fire-retardant value be more than 40), chemical proofing high (resistance to concentrated hydrochloric acid, dense
The sodium hydroxide of sulfuric acid, the nitric acid that concentration is 60% and concentration 20% that degree is 90%), mechanical strength and electrical insulating property it is good
Advantage, plays a very good protection to cable.
According to exemplary embodiment of the present utility model, the thickness of the oversheath 5 is 1.2~1.5mm.
According to exemplary embodiment of the present utility model, the external diameter of the inner wire 1 is 1.3mm.
According to exemplary embodiment of the present utility model, the coverage rate of 3 pairs of insulating barriers of first screen layer is not
Less than 90%.
According to exemplary embodiment of the present utility model, a diameter of 0.2mm of the silver-coated copper wire.
According to exemplary embodiment of the present utility model, the silver coating thickness of the silver-coated copper wire for 0.01mm~
0.02mm。
According to exemplary embodiment of the present utility model, the tin coating thickness of the tinned wird for 0.01mm~
0.02mm。
The device that the utility model embodiment is provided for the specific hardware in equipment or can be installed in equipment
Software or firmware etc..The technique effect of the device that the utility model embodiment is provided, its realization principle and generation and foregoing side
Method embodiment is identical, to briefly describe, and device embodiment part does not refer to part, refers in corresponding in preceding method embodiment
Hold.It is apparent to those skilled in the art that, for convenience and simplicity of description, system described above, device
With the specific work process of unit, the corresponding process in above method embodiment is may be referred to, be will not be repeated here.
, can be by other in embodiment provided by the utility model, it should be understood that disclosed apparatus and method
Mode realize.Device embodiment described above is only schematical, for example, the division of the unit, only one
Kind of division of logic function, can there is other dividing mode when actually realizing, in another example, multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or call connection can be the INDIRECT COUPLING or logical of device or unit by some telephony interfaces
Words connection, can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in the embodiment that the utility model is provided can be integrated in a processing unit,
Can also be that unit is individually physically present, can also two or more units it is integrated in a unit.
If the function is realized using in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on it is such understand, the technical solution of the utility model substantially or
Person says that the part of the part contributed to prior art or the technical scheme can be embodied in the form of software product,
The computer software product is stored in a storage medium, including some instructions are to cause a computer equipment (can be with
It is personal computer, server, or network equipment etc.) perform whole or the portion of the utility model each embodiment methods described
Step by step.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), with
Machine access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with Jie of store program codes
Matter.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing, in addition, term " the
One ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that indicating or implying relative importance.
Finally it should be noted that：Various embodiments above is only limited to illustrate the technical solution of the utility model, rather than to it
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (8)
1. a kind of coaxial radio frequency cable, it is characterised in that including inner wire, insulating barrier, first screen layer, secondary shielding layer and outer
Sheath；
The periphery of the inner wire is the insulating barrier, and the periphery of the insulating barrier is the first screen layer, first screen
The periphery for covering layer is the secondary shielding layer, and the periphery of the secondary shielding layer is the oversheath；
The inner wire is formed for many silver-coated copper wires are stranded, the silver coating thickness of the silver-coated copper wire for 0.01mm~
0.02mm, a diameter of 0.2mm of the silver-coated copper wire, the first screen layer are aluminium foil, and the secondary shielding layer is copper mesh screen
Layer is covered, the copper mesh screen layer is formed by many tinned wird braidings.
2. a kind of coaxial radio frequency cable according to claim 1, it is characterised in that the insulating barrier is polyethylene insulation
Layer.
3. a kind of coaxial radio frequency cable according to claim 2, it is characterised in that the insulating barrier is to use physical blowing
Principle foams the insulating barrier to be formed.
4. a kind of coaxial radio frequency cable according to claim 1, it is characterised in that the oversheath protects for polyvinyl chloride
Set.
5. a kind of coaxial radio frequency cable according to claim 4, it is characterised in that the thickness of the oversheath is 1.2~
1.5mm。
6. a kind of coaxial radio frequency cable according to claim 1, it is characterised in that the external diameter of the inner wire is 1.3mm.
7. a kind of coaxial radio frequency cable according to claim 1, it is characterised in that the first screen layer is to the insulation
The coverage rate of layer is not less than 90%.
8. a kind of coaxial radio frequency cable according to claim 1, it is characterised in that the tin coating thickness of the tinned wird
For 0.01mm~0.02mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620916934.4U CN206584749U (en) | 2016-08-19 | 2016-08-19 | A kind of coaxial radio frequency cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620916934.4U CN206584749U (en) | 2016-08-19 | 2016-08-19 | A kind of coaxial radio frequency cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206584749U true CN206584749U (en) | 2017-10-24 |
Family
ID=60109098
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620916934.4U Expired - Fee Related CN206584749U (en) | 2016-08-19 | 2016-08-19 | A kind of coaxial radio frequency cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206584749U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112582099A (en) * | 2020-12-05 | 2021-03-30 | 福建微波通通信技术有限公司 | Flexible radio frequency cable |
-
2016
- 2016-08-19 CN CN201620916934.4U patent/CN206584749U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112582099A (en) * | 2020-12-05 | 2021-03-30 | 福建微波通通信技术有限公司 | Flexible radio frequency cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171024 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |