CN202563939U - Front VGA cable having dual-type shielding effect - Google Patents
Front VGA cable having dual-type shielding effect Download PDFInfo
- Publication number
- CN202563939U CN202563939U CN2012202056296U CN201220205629U CN202563939U CN 202563939 U CN202563939 U CN 202563939U CN 2012202056296 U CN2012202056296 U CN 2012202056296U CN 201220205629 U CN201220205629 U CN 201220205629U CN 202563939 U CN202563939 U CN 202563939U
- Authority
- CN
- China
- Prior art keywords
- cable
- vga
- dual
- shielding effect
- preposition
- 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.)
- Expired - Fee Related
Links
- 230000000694 effects Effects 0.000 title abstract description 7
- 238000009941 weaving Methods 0.000 claims description 5
- 238000009954 braiding Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 description 9
- 239000004020 conductor Substances 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
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- Communication Cables (AREA)
Abstract
The utility model provides a front VGA cable having a dual-type shielding effect. The structure of the front VGA cable having the dual-type shielding effect includes a VGA port and a main board interface. The VGA port connects with the main board interface through a cable. The cable includes a lead. The external side of the lead is provided with a closed inner shielding layer and a closed outer shielding layer arranged in a winding manner successively from inside out. Compared with the prior art, the front VGA cable having the dual-type shielding effect provided by the utility model has characteristics of reasonable design, simple structure, convenient usage and the like. The shielding effect is good, the weight is low and the flexibility is good. The front VGA cable having the dual-type shielding effect has very good spreading and applying value.
Description
Technical field
The utility model relates to a kind of cable, a kind of specifically preposition VGA cable with dimorphism shield effectiveness.
Background technology
The tide server has two VGA ports, and one preposition, a postposition.Wherein preposition VGA port is connected with server master board through a cable, because length of cable, all the other casings, PCB or other structures are compared, and they more are easy to generate radiation, especially in the high frequency field.
According to antenna theory, when having electric current in the antenna conductor, antenna can be the signal of telecommunication radiation on the conductor to external environment condition.When antenna reached certain length, it is maximum that the conversion of this signal of telecommunication and electromagnetic field reaches.Obviously the cable in our product possesses this antenna function.Cable is the same with antenna, when the length of noise wavelength and cable is compared, resonance can take place.At this moment signal almost can 100% converts electromagnetic field to.
Cable radiation problem be one of modal problem in the engineering, the equipment more than 90% can not through radiation test all since the cable radiation cause.The radiation mechanism that cable produces mainly is the common mode radiation that the common mode current on the lead produces in the cable.The loop area of common mode current is to be formed by cable and the earth (or other contiguous large-scale conductors), therefore has bigger loop area, can produce stronger radiation.
We generally can be employed in the way that adds screen on the cable in order to reduce radiation, and present screen is configured with Weaving type and two kinds of the folded type shieldings of the folded type/paper tinsel of band, and they have different separately screening effectivenesss and terminating method.
Individual layer Weaving type shielding is made up of the webbed wire of braiding, for cable provides covering metal structure above that, can reach 95% area coverage and certain high frequency performance.But increase the weight and the hardness of cable greatly.
The folded type shielding of the folded type/paper tinsel of band resistance is higher, and the bulk shielding effect is moderate.They are in light weight, and flexible good, cost is low; But the termination difficulty is big.Capacitive shields, but is not suitable for magnetic field shielding.
Thereby, very necessary when designing a kind of cable that can have both above-mentioned two kinds of shielding advantages.
Summary of the invention
The technical assignment of the utility model is the deficiency that solves prior art, and a kind of preposition VGA cable with dimorphism shield effectiveness is provided.
The technical scheme of the utility model realizes by following mode; This a kind of preposition VGA cable with dimorphism shield effectiveness; Its structure comprises VGA port, mainboard interface; Be connected through cable between said VGA port and the mainboard interface, this cable comprises lead, and the outside of said lead order from inside to outside is surrounded with airtight internal shield, outer shielding layer.
Said internal shield is the paillon foil laminated type screen that spirals.
The individual layer Weaving type screen that said outer shielding layer is made up of the webbed wire of braiding.
The said outer shielding layer outside also is provided with a protective sleeve.
The beneficial effect that the utility model is compared with prior art produced is:
Characteristics such as that a kind of preposition VGA cable with dimorphism shield effectiveness of the utility model has is simple in structure, easy to use, be skillfully constructed are designed with interior outer shielding layer, and shield effectiveness is good, and weight is light, and are flexible good, have good value for applications.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model.
Accompanying drawing 2 is cable part sketch mapes of the utility model.
Mark in the accompanying drawing is represented respectively:
1, VGA port, 2, cable, 3, mainboard interface, 4, protective sleeve, 5, outer shielding layer, 6, internal shield, 7, lead.
Embodiment
Below in conjunction with accompanying drawing a kind of preposition VGA cable with dimorphism shield effectiveness of the utility model is done following the detailed description.
Like accompanying drawing 1, shown in Figure 2; This a kind of preposition VGA cable with dimorphism shield effectiveness; Its structure comprises VGA port one, mainboard interface 3; Be connected through cable 2 between said VGA port one and the mainboard interface 3, this cable 2 comprises lead 7, and the outside of said lead 7 order from inside to outside is surrounded with airtight internal shield 6, outer shielding layer 5.
Said internal shield 6 is the paillon foil laminated type screen that spirals; Outer shielding layer 5 is formed the individual layer Weaving type screen that tin-coated copper is compiled by the webbed wire of braiding.
In outer shielding layer 5 outsides one protective sleeve 4 is set also.
Claims (4)
1. preposition VGA cable with dimorphism shield effectiveness; Its structure comprises VGA port, mainboard interface; It is characterized in that being connected through cable between said VGA port and the mainboard interface; This cable comprises lead, and the outside of said lead order from inside to outside is surrounded with airtight internal shield, outer shielding layer.
2. a kind of preposition VGA cable with dimorphism shield effectiveness according to claim 1 is characterized in that said internal shield is the paillon foil laminated type screen that spirals.
3. a kind of preposition VGA cable with dimorphism shield effectiveness according to claim 1 and 2 is characterized in that the individual layer Weaving type screen that said outer shielding layer is made up of the webbed wire of braiding.
4. a kind of preposition VGA cable with dimorphism shield effectiveness according to claim 3 is characterized in that the said outer shielding layer outside also is provided with a protective sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202056296U CN202563939U (en) | 2012-05-09 | 2012-05-09 | Front VGA cable having dual-type shielding effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202056296U CN202563939U (en) | 2012-05-09 | 2012-05-09 | Front VGA cable having dual-type shielding effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202563939U true CN202563939U (en) | 2012-11-28 |
Family
ID=47213567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202056296U Expired - Fee Related CN202563939U (en) | 2012-05-09 | 2012-05-09 | Front VGA cable having dual-type shielding effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202563939U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109542819A (en) * | 2018-11-26 | 2019-03-29 | 郑州云海信息技术有限公司 | A kind of preposition I/O port of server and the implementation method for improving EMC performance |
-
2012
- 2012-05-09 CN CN2012202056296U patent/CN202563939U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109542819A (en) * | 2018-11-26 | 2019-03-29 | 郑州云海信息技术有限公司 | A kind of preposition I/O port of server and the implementation method for improving EMC performance |
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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: 20121128 Termination date: 20150509 |
|
| EXPY | Termination of patent right or utility model |