CN104575850A - Network cable core used for shielding EMI (Electro-Magnetic Interference) - Google Patents
Network cable core used for shielding EMI (Electro-Magnetic Interference) Download PDFInfo
- Publication number
- CN104575850A CN104575850A CN201310469081.5A CN201310469081A CN104575850A CN 104575850 A CN104575850 A CN 104575850A CN 201310469081 A CN201310469081 A CN 201310469081A CN 104575850 A CN104575850 A CN 104575850A
- Authority
- CN
- China
- Prior art keywords
- shielding
- network cable
- netting twine
- cable core
- emi
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Insulated Conductors (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention provides a network cable core used for shielding EMI (Electro-Magnetic Interference). The network cable core comprises a cross lead wire partition bar made of PE material. The network cable core is characterized in that a metal conductive film is deposited on the cross lead wire partition bar made of PE material; after the surface of the cross lead wire partition bar made of PE material is coated with a metal film, the EMI shielding effect between network cables can be greatly improved; the metal film is integrated with an outer shielding film layer, the electromagnetism absorption amount can be remarkably improved; electromagnetic compatibility (EMC) is improved; the interference resistance is excellent; the application of high-transmission-rate and high-transmission-frequency network cable technology to a more complex electromagnetic environment can be facilitated, so that the network cable technology can obtain the considerable development.
Description
Technical field
The present invention relates to network cable field, particularly a kind of netting twine core for EMI shielding.
Background technology
Along with the develop rapidly of information communication science and technology, the reliable communications circuit of the information join dependency of every field realizes in the world, therefore the reliability of communications circuit is particularly important, this comprising anti-electromagnetic interference shielding ability, mechanical performance, temperature special efficacy, electric property is stablized, transmission delay is low, size is little, resistance is good, have excellent crosstalk, return loss and isolation and undershoot loss all has more and more higher requirement.
At present, netting twine can be divided into non-shielding netting wire (UTP=UNSHILDED TWISTED PAIR) and shielding netting wire (STP=SHIELDED TWISTED PAIR).The skin of shielding netting wire cable is wrapped up by aluminium platinum, and to reduce radiation, but can not eliminate radiation completely, shielding netting wire price is relatively high, than non-shielding netting wire cable difficulty during installation.
Netting twine is generally entwined mutually by two 22-26 insulated copper wire, and during actual use, netting twine is wrapped in an insulated cable sleeve pipe together by multipair netting twine.It is four right that typical netting twine has, and also has more multipair netting twine to be placed in a cable sleeve.We are referred to as network cable for these.In network cable (yet claiming twisted-pair cable), not collinear to having different lay length, in general, lay length in 38.1mm to 14cm, by left hand lay.The right lay length of adjacent line is at more than 12.7mm, and its antijamming capability closeer generally turning round line is stronger, and compared with other transmission mediums, netting twine is in transmission range, and the aspect such as channel width and data transmission bauds is all subject to a definite limitation, but price is comparatively cheap.
Usual netting twine is divided into totally 6 class lines, and wherein the making structure of inhomogeneity netting twine is not identical, and wherein now the application of six class netting twines is best suited for the application of transmission rate higher than 1Gbps.Improve the performance in crosstalk and return loss, for the highspeed network applications of full duplex of new generation, excellent return loss performance is epochmaking.Basic link model is eliminated in six class standard, line standard adopts the topological structure of star, the wiring distance required is: the length of permanent link can not more than 90m, channel length can not more than 100m, and the most crucial aspect of application for six class netting twine technology is that whether the shielding properties of communications netting twine is reliable.
Certain screen is had to play outside the effect of elimination partial radiation with shielding netting wire by skin, but there is the phenomenon of electromagnetic interference between the lines equally, so be designed with cross recess, also cross conductor separation bar is, its design function promotes near-end cross (NEXT) and impedance behavior, strengthens bandwidth sum signal to noise ratio surplus.Particularly the 6th class netting twine is because transmitting the performance requirement of work, mutual interfering design more between demand line and line, increase this shielding construction, design for strengthening anti-electromagnetic interference capability, but due to cross conductor separation strip adoption is the manufacture of PE (polyethylene) plastic material, only have faint reinforcement in anti-electromagnetic interference shielding, but well can not eliminate the hidden danger of mutual Communication Jamming even thoroughly, become the thorny problem of this kind of large transmission rate and the technical development of large transmission frequency netting twine.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of netting twine core for EMI shielding, adopt after the surface metalation film process of cross conductor separation bar of being made up of PE material, EMI screening effectiveness between netting twine increases substantially, combine with outer field barrier film layer again, electromagnetic absorption amount significantly improves, Electro Magnetic Compatibility (EMC) increases, immunity to interference is superior, promote that large transmission rate and large transmission frequency netting twine technology can be applied in more complicated electromagnetic environment, make this netting twine technology to obtain significant progress.
For addressing the deficiencies of the prior art, the technical solution adopted in the present invention is: the invention provides a kind of netting twine core for EMI shielding, comprise the cross conductor separation bar be made up of PE material, it is characterized in that: on the cross conductor separation bar that PE material is made, deposit metal conductive film.
Further, described metal conductive film can reach different screening effectivenesss according to different deposit thickness, and design parameter sets according to the shielding demand of circuit.
Further, the shielding demand of described circuit is for when frequency is at 30-230MHz, and screening effectiveness comprises 20dB, 30dB, 40dB, 50dB, 60dB.
Further, the shielding demand of described circuit is for when frequency is at 230-1000MHz, and screening effectiveness comprises 10dB, 20dB, 30dB, 40dB, 50dB.
The invention has the beneficial effects as follows: the EMI screening effectiveness between netting twine can be made to increase substantially, combine with outer field barrier film layer again, electromagnetic absorption amount significantly improves, Electro Magnetic Compatibility (EMC) increases, immunity to interference is superior, promote that large transmission rate and large transmission frequency netting twine technology can be applied in more complicated electromagnetic environment, make this netting twine technology to obtain significant progress.
Accompanying drawing explanation
Fig. 1 is cross section structure figure of the present invention.
In figure, 1, metal conductive film, 2, the cross conductor separation bar be made up of PE material.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the invention provides a kind of netting twine core for EMI shielding, comprise the cross conductor separation bar 2 be made up of PE material, it is characterized in that: on the cross conductor separation bar 2 that PE material is made, deposit metal conductive film 1.
Described metal conductive film 1 can reach different screening effectivenesss according to different deposit thickness, and design parameter sets according to the shielding demand of circuit.
The shielding demand of described circuit is for when frequency is at 30-230MHz, and screening effectiveness comprises 20dB, 30dB, 40dB, 50dB, 60dB.
The shielding demand of described circuit is for when frequency is at 230-1000MHz, and screening effectiveness comprises 10dB, 20dB, 30dB, 40dB, 50dB.
Although invention has been described by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; the distortion such as interpolation done without departing from the spirit or scope of the present invention, amendment, omission, replacement, all within protection scope of the present invention.
Claims (4)
1., for a netting twine core for EMI shielding, comprise the cross conductor separation bar be made up of PE material, it is characterized in that: on the cross conductor separation bar that PE material is made, deposit metal conductive film.
2. a kind of netting twine core for EMI shielding according to claim 1, it is characterized in that: described metal conductive film can reach different screening effectivenesss according to different deposit thickness, design parameter sets according to the shielding demand of circuit.
3. a kind of netting twine core for EMI shielding according to claim 2, is characterized in that: the shielding demand of described circuit is for when frequency is at 30-230MHz, and screening effectiveness comprises 20dB, 30dB, 40dB, 50dB, 60dB.
4. a kind of netting twine core for EMI shielding according to claim 2, is characterized in that: the shielding demand of described circuit is for when frequency is at 230-1000MHz, and screening effectiveness comprises 10dB, 20dB, 30dB, 40dB, 50dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310469081.5A CN104575850A (en) | 2013-10-09 | 2013-10-09 | Network cable core used for shielding EMI (Electro-Magnetic Interference) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310469081.5A CN104575850A (en) | 2013-10-09 | 2013-10-09 | Network cable core used for shielding EMI (Electro-Magnetic Interference) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104575850A true CN104575850A (en) | 2015-04-29 |
Family
ID=53091710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310469081.5A Pending CN104575850A (en) | 2013-10-09 | 2013-10-09 | Network cable core used for shielding EMI (Electro-Magnetic Interference) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104575850A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111769417A (en) * | 2020-06-12 | 2020-10-13 | 中国船舶重工集团公司第七二四研究所 | Shielding design method of gigabit network collector ring |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3911200A (en) * | 1973-01-15 | 1975-10-07 | Sun Chemical Corp | Electrical cable housing assemblies |
| CN200993895Y (en) * | 2006-12-06 | 2007-12-19 | 江苏江扬电缆有限公司 | Indoor-outdoor high performance data cable |
-
2013
- 2013-10-09 CN CN201310469081.5A patent/CN104575850A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3911200A (en) * | 1973-01-15 | 1975-10-07 | Sun Chemical Corp | Electrical cable housing assemblies |
| CN200993895Y (en) * | 2006-12-06 | 2007-12-19 | 江苏江扬电缆有限公司 | Indoor-outdoor high performance data cable |
Non-Patent Citations (1)
| Title |
|---|
| 翟丽: "《车辆电磁兼容基础》", 31 May 2012, 机械工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111769417A (en) * | 2020-06-12 | 2020-10-13 | 中国船舶重工集团公司第七二四研究所 | Shielding design method of gigabit network collector ring |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101004958B (en) | Communication cable | |
| KR100725287B1 (en) | UTP cable for transmitting high frequency signal | |
| CN1953107A (en) | High speed signal cable | |
| CN105741965A (en) | Miniature parallel high-speed transmission cable | |
| CN103268788A (en) | Cable with multiple pairs of parallel symmetrical axes | |
| CN202332403U (en) | Flame-retardant waterproof composite shielding high-frequency digital cable | |
| CN104575850A (en) | Network cable core used for shielding EMI (Electro-Magnetic Interference) | |
| CN201181610Y (en) | Low-crosstalk network cable with shielding compartment | |
| CN207425397U (en) | Yi Zhong Swastika font stranding skeleton structures | |
| CN103165229B (en) | There is the data cable of shielding interference function | |
| CN203444855U (en) | Four-twisted-wire high speed data communication cable with function of anti-interference | |
| CN206961574U (en) | A kind of eight class netting twines of high shielding | |
| CN203242432U (en) | Multi-pair parallel symmetric-axis cable | |
| CN104867610A (en) | Anti-interference high-definition network communication data transmission cable | |
| CN203444864U (en) | Anti-interference category-8 digital communication cable | |
| CN203444859U (en) | Shielding-type four-wire pair data transmission cable | |
| CN205177480U (en) | Anti -interference composite cable | |
| CN203150176U (en) | Anti-ultraviolet composite cable | |
| CN204740907U (en) | High fire -retardant shielding type number of main line level is according to cable | |
| CN202871334U (en) | Three-core shielding cable for automobile | |
| CN202940060U (en) | Cable used for communication | |
| CN202940061U (en) | Anti-electromagnetic interference cable used for communication | |
| CN202796237U (en) | Horizontal pair twist communication cable | |
| CN2935393Y (en) | Double-layer shielding spring cable | |
| CN103236297B (en) | Super-flexible indoor high-speed data cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |