CN2621330Y - Network data cable with shield - Google Patents
Network data cable with shield Download PDFInfo
- Publication number
- CN2621330Y CN2621330Y CN 03261310 CN03261310U CN2621330Y CN 2621330 Y CN2621330 Y CN 2621330Y CN 03261310 CN03261310 CN 03261310 CN 03261310 U CN03261310 U CN 03261310U CN 2621330 Y CN2621330 Y CN 2621330Y
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- CN
- China
- Prior art keywords
- shielding
- shielding layer
- cable
- twisted
- screen
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a shielding wire cable used for layout of network, specifically to a cable primarily used for structurized network layout. More than one shielding layer is provided on outer side of twisted pairs in the cable. The cable consists of four twisted pairs and an external shielding layer. More than one shielding layer is provided between the twisted pairs and the external protective coating. Under the circumstance that network bandwidth is increased constantly, signal integrity on non-shielding systems can be improved by increasing the shielding layer of the wire cable. Reflection, absorption and skin effects of the metal shielding layer are used to prevent electromagnetic interference and electromagnetic radiation. The shielding system comprising cables and connecting pieces comprehensively makes use of equilibrium principle of the twisted pairs and shielding effect of the shielding layer, and has excellent EMC accordingly. The shielding layer effectively prevents external electromagnetic interference from entering the cables, and also prevents internal signal from radiating out to interfere in other equipments.
Description
Technical field
The utility model relates to a kind of cable with shielding zone network wiring usefulness, specifically a kind of cable that is mainly used in the structured network wiring, and the twisted-pair feeder arranged outside has the screen more than one deck in cable.
Background technology
At present, what the structured network wiring was adopted at most is 5 class cables, just the unshielded twisted pair that is made of 4 pairs of twisted-pair feeders (UTP) cable.Usually the UTP cable as option most economical and that be enough to satisfy most of installation requirements.In Germany and other European country, comprise France, Switzerland and Austria, FTP then occupies an leading position.But, along with the continuous lifting of network speed, and the extensive use of network layout, great changes will take place for environment for use, and the electromagnetic compatibility of UTP (EMC) performance will descend, and unshielded twisted pair (UTP) cable can not satisfy user's demand fully.Through measure finding that the cable twisted-pair feeder can only satisfy the EMC performance of 30MHz, for higher electromagnetic interference twisted-pair feeder with powerless.
Summary of the invention
The purpose of this utility model is exactly in order to overcome the defective of prior art, a kind of twisted-pair cable that has screen to be provided.
The purpose of this utility model is achieved through the following technical solutions.
The network data cable of band shielding comprises four pairs of twisted-pair feeders and exterior protection layer, it is characterized in that being provided with between twisted-pair feeder and exterior protection layer the screen more than one deck.
The network data cable of described band shielding, its screen can be for two-layer, and it is external that first screen is coated on each twisted-pair feeder, and the secondary shielding layer is coated on outside all twisted-pair feeders.
The network data cable of described band shielding, its screen is made of metal tinfoil paper or tinfoil paper.
The network data cable of described band shielding, the thickness of metal tinfoil paper or tinfoil paper screen is 38 μ m.
Advantage of the present utility model is very outstanding, can improve signal integrity on the non-shielding harness at the screen that increases cable under the situation that the network bandwidth improves constantly; Utilize the reflection, absorption of metal screen layer and the function that skin effect realizes preventing electromagnetic interference and electromagnetic radiation, comprise cable, the shielding harness of connector has fully utilized the equilibrium principle of twisted-pair feeder and the shielding action of screen, thereby has extraordinary electromagnetic compatibility (EMC) characteristic.Screen prevents that effectively external electromagnetic interference from entering cable, also stops internal signal to radiate simultaneously, disturbs the work of miscellaneous equipment.
Description of drawings
Fig. 1 is the cross-sectional view of the network data cable of band shielding of the present utility model.
Fig. 2 is another embodiment of the network data cable of band shielding of the present utility model.
Embodiment
Below in conjunction with the embodiment in the accompanying drawing the utility model is further described.
As shown in Figure 1, data cable is made up of four pairs of twisted-pair feeders 1, and four pairs of twisted-pair feeders coat metal screen layer 2 outward, coat protective layer 3 outside metal screen layer.
Twisted-pair feeder is made of conductor 4 and insulating barrier 5, twisted-pair cable by coupling line to each signal of half, the positive negative signal of can cancelling each other, and then realize Electro Magnetic Compatibility.For effective work, the stranded necessary good balance that keeps.During the bandwidth of twisted-pair feeder below 30M, can satisfy the MEC performance demands substantially, but high again transmission rate will go wrong.And desirable balance transmission system is non-existent.The equilibrium response of unshielded twisted pair (UTP) cable have more than the quality that depends on parts itself (as strand to), and can be subjected to the influence of surrounding environment.Because the metal around the UTP, hidden " ", the tractive in the construction, crooked or the like situation all can destroy its equilibrium response, thereby reduce electromagnetic compatibility (EMC) performance.Therefore, being necessary increases screen to conventional twisted-pair feeder, and screen 3 is wrapped in the right outside of whole twisted-pair feeders in the present embodiment.Add one deck or two metal formings in the outside of four pairs of twisted-pair feeders, utilize the electromagnetic reflection of metal pair, absorption and skin effect principle to prevent that effectively external electromagnetic interference from entering cable, also stop internal signal to radiate simultaneously, disturb the work of miscellaneous equipment.
As shown in Figure 2, another embodiment of the present utility model increases layer of metal screen 6 again to every pair of twisted-pair feeder on the basis of the foregoing description, and metal screen layer 6 is wrapped in outside every pair of twisted-pair feeder.
No matter above-mentioned which kind of embodiment should consider the screen good earth in wiring from the aspect of electromagnetic compatibility (EMC), the screen of cable must with large-area metal surface around contacting, promptly so-called 360 ° of ground connection (Grounding).In order to ensure validity, shielding must be on electronics from end-to-end be continuous, and proper grounding.The shielding harness of imperfect earth adopts non-shielding harness that worse performance level is provided in the time of in fact can beginning.Under worst case, shielding itself may become a radiation source, produces so-called " antenna effect ", generates the electric current ground loop, or receives ambient radiation, and the data cable of Xiang Xiangling sends harmful interference.
It more than is description to technical solutions of the utility model and embodiment, rather than to the qualification of present techniques scheme, obviously realize that the invention has various ways, those skilled in the art can make various improvement according to content and spirit that the application's claim is limited.
Claims (4)
1. the network data cable of band shielding comprises four pairs of twisted-pair feeders and exterior protection layer, it is characterized in that being provided with between twisted-pair feeder and exterior protection layer the screen more than one deck.
2. the network data cable of band shielding according to claim 1 is characterized in that described screen can be for two-layer, and it is external that first screen is coated on every pair of twisted-pair feeder, and the secondary shielding layer is coated on outside all twisted-pair feeders.
3. according to the network data cable of claim 1,2 described band shieldings, it is characterized in that described screen is made of metal tinfoil paper or tinfoil paper.
The network data cable of 4 band shieldings according to claim 3, the thickness that it is characterized in that described metal tinfoil paper or tinfoil paper screen is 38 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03261310 CN2621330Y (en) | 2003-05-20 | 2003-05-20 | Network data cable with shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03261310 CN2621330Y (en) | 2003-05-20 | 2003-05-20 | Network data cable with shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2621330Y true CN2621330Y (en) | 2004-06-23 |
Family
ID=34255145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03261310 Expired - Fee Related CN2621330Y (en) | 2003-05-20 | 2003-05-20 | Network data cable with shield |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2621330Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008128410A1 (en) * | 2007-04-19 | 2008-10-30 | Orisol Asia Ltd. | An embossing device with radio frequency interefere protection |
| CN114898937A (en) * | 2022-06-16 | 2022-08-12 | 江苏珠影特种电缆有限公司 | Composite multi-core cable and preparation method thereof |
-
2003
- 2003-05-20 CN CN 03261310 patent/CN2621330Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008128410A1 (en) * | 2007-04-19 | 2008-10-30 | Orisol Asia Ltd. | An embossing device with radio frequency interefere protection |
| CN114898937A (en) * | 2022-06-16 | 2022-08-12 | 江苏珠影特种电缆有限公司 | Composite multi-core cable and preparation method thereof |
| CN114898937B (en) * | 2022-06-16 | 2023-11-10 | 江苏珠影特种电缆有限公司 | Composite multi-core cable and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |