CN201281983Y - Anti-interference coaxial-cable - Google Patents
Anti-interference coaxial-cable Download PDFInfo
- Publication number
- CN201281983Y CN201281983Y CNU200820164989XU CN200820164989U CN201281983Y CN 201281983 Y CN201281983 Y CN 201281983Y CN U200820164989X U CNU200820164989X U CN U200820164989XU CN 200820164989 U CN200820164989 U CN 200820164989U CN 201281983 Y CN201281983 Y CN 201281983Y
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- interference
- layer
- coaxial cable
- shielding layer
- utility
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Abstract
The utility model relates to an anti-interference coaxial cable, and the utility model aims to provide the anti-interference coaxial cable which has the characteristics of good anti-high-frequency interference performance, simple structure and low manufacturing cost. The utility model adopts the technical scheme that the anti-interference coaxial cable comprises a core wire; and an insulating material layer, a shielding layer and a sheath are concentrically coated at the periphery of the core wire. The coaxial cable is characterized in that a second shielding layer is coaxially arranged outside the sheath, and an outer sheath coats outside the second shielding layer.
Description
Technical field
The utility model relates to a kind of anti-interference coaxial cable, belongs to the signal transmssion line technical field.
Background technology
The coaxial vision cable of tradition, have multilayer high compile the copper netting multiple high woollen yarn knitting structures such as single screen cable, the double shield layer cable of " aluminium foil-netting ", four shielded type cables of " aluminium foil-netting--aluminium foil-netting "; Yet their similarity is that a screen all is set.Interference inductive voltage commonly used all is directly to be connected in the video signal transmission loop, and high volume cable is little because of its outer conductor resistance, and the interference inductive voltage of formation is also relatively low.Power supply disturbs this antagonism low frequency (as below tens hertz), the interference of motor electric spark has certain effect.But to High-frequency Interference, because (skin effect can make the effective resistance of conductor increase " skin effect ", promptly when the very high electric current of frequency passes through lead, can think that electric current only flows through in very thin one deck on conductive line surfaces, this cross section that is equivalent to lead reduces, resistance increases, and that is to say that the frequency of electric current is high more, and skin effect is remarkable more.) influence make the high-frequency resistance of lead with low to compile cable identical, anti-interference effect is also the same substantially.
Facts have proved that high volume cable has only the effect of suitable reduction low-frequency disturbance, and antagonism strong jamming and High-frequency Interference still are powerless, and also do not address this problem better technical scheme at present.
The utility model content
The purpose of this utility model is to overcome the deficiency of above-mentioned existence, and a kind of anti-interference coaxial cable is provided, and this cable should have the good characteristics of anti-High-frequency Interference performance, and simple in structure, production cost is low.
The utility model is finished by following technical solution: anti-interference coaxial cable, comprise heart yearn, the heart yearn periphery with one heart coated successively insulation material layer, screen and wrapper layer, it is characterized in that the outer also coaxial secondary shielding layer that is provided with of described wrapper layer, described secondary shielding layer outside coats an oversheath.
Described secondary shielding layer also adopts aluminium foil layer to coat the structure of netting layer outward.
Described heart yearn is a copper core.
Operation principle of the present utility model is: from disturb producing principle analysis, interference is that the induced voltage that produces on the screen the conventional coaxial cable heart yearn outside directly is connected on formation in the video signal transmission loop " long ground wire ".The utility model is by improving, between original screen and oversheath, add the secondary shielding layer, interference inductive voltage can only be formed on the secondary shielding layer, and the insulation of it and video signal transmission loop is separated (" the long ground wire " that can't enter original screen) by foreskin (insulating barrier), thereby ELIMINATION OF ITS INTERFERENCE outside the video signal transmission loop, is reached jamproof purpose.
The beneficial effects of the utility model are: good in anti-interference performance, particularly anti-High-frequency Interference superior performance; At Electromagnetic Interference below tens kilo hertzs such as the superpower low frequency electrical source of power interference that produces under the elevator environment, the interference of motor electric spark, the interference of variable-frequency motor Interference Control signal, interference free performance is particularly outstanding.In the long engineering design of transmission line, adopt the utility model after, some interference protection measures on traditional engineering are abbreviation greatly also, and can effectively reduce project total cost.
Description of drawings
Fig. 1 is a perspective view of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Referring to Fig. 1, anti-interference coaxial cable comprises heart yearn 1, the heart yearn periphery with one heart coated successively insulation material layer 2, screen 3 (aluminium foil layer coats the netting layer outward) and wrapper layer 4, the outer also coaxial secondary shielding layer 5 that is provided with of wrapper layer, secondary shielding layer 5 outside coat with oversheath 6; The secondary shielding layer also adopts aluminium foil layer to coat the structure of netting layer outward.By the secondary shielding layer is set, the interference inductive voltage of generation can only be formed on " secondary shielding layer ", and by " second insulating barrier " (wrapper layer 4) of the inside it and the insulation of video signal transmission loop are separated, ELIMINATION OF ITS INTERFERENCE outside the video signal transmission loop, is reached jamproof purpose.
Described heart yearn preferably copper heart yearn.
Claims (3)
1, anti-interference coaxial cable comprises heart yearn (1), heart yearn (1) periphery with one heart coated successively insulation material layer (2), screen (3) and wrapper layer (4), it is characterized in that described wrapper layer (4) the also coaxial secondary shielding layer (5) that is provided with outward; Secondary shielding layer (5) outside coats oversheath (6).
2, anti-interference coaxial cable according to claim 1 is characterized in that described secondary shielding layer adopts aluminium foil layer to coat the structure of netting layer outward.
3, anti-interference coaxial cable according to claim 1 and 2 is characterized in that described heart yearn (1) is a copper core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820164989XU CN201281983Y (en) | 2008-09-25 | 2008-09-25 | Anti-interference coaxial-cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820164989XU CN201281983Y (en) | 2008-09-25 | 2008-09-25 | Anti-interference coaxial-cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201281983Y true CN201281983Y (en) | 2009-07-29 |
Family
ID=40928850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820164989XU Expired - Fee Related CN201281983Y (en) | 2008-09-25 | 2008-09-25 | Anti-interference coaxial-cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201281983Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020098216A1 (en) * | 2018-11-16 | 2020-05-22 | 东莞金信诺电子有限公司 | High-frequency low-loss data transmission line |
-
2008
- 2008-09-25 CN CNU200820164989XU patent/CN201281983Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020098216A1 (en) * | 2018-11-16 | 2020-05-22 | 东莞金信诺电子有限公司 | High-frequency low-loss data transmission line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20140925 |
|
| EXPY | Termination of patent right or utility model |