EP0867892A1 - Câble à conducteur protégé par un écran à ruban - Google Patents
Câble à conducteur protégé par un écran à ruban Download PDFInfo
- Publication number
- EP0867892A1 EP0867892A1 EP98400710A EP98400710A EP0867892A1 EP 0867892 A1 EP0867892 A1 EP 0867892A1 EP 98400710 A EP98400710 A EP 98400710A EP 98400710 A EP98400710 A EP 98400710A EP 0867892 A1 EP0867892 A1 EP 0867892A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ribbon
- cable
- wound
- screen
- conductor
- 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.)
- Granted
Links
- 239000004020 conductor Substances 0.000 title claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229920000728 polyester Polymers 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 229920003023 plastic Polymers 0.000 claims abstract 2
- 239000004033 plastic Substances 0.000 claims abstract 2
- 239000004411 aluminium Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 2
- 230000003416 augmentation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
- H01B11/10—Screens specially adapted for reducing interference from external sources
- H01B11/1025—Screens specially adapted for reducing interference from external sources composed of a helicoidally wound tape-conductor
Definitions
- the present invention relates to a cable to the minus an electrical conductor.
- the disturbances are not only those that originate from the outside, but also the disturbances that originated by signals from at least one other conductor of the same cable. These latter disturbances are generally called "crosstalk".
- a ribbon is often provided conductor wound helically around each assembly. It is also possible to have a long ribbon having its edges longitudinal overlapping. Such a long ribbon gives, theoretically, better protection with respect to signals to high frequencies because the protection increases when the length of recovery decreases; but long ribbons are difficult to install for small diameters and for close conductors. This is why when, in the same cable, two ribbons (or more), these ribbons are usually arranged in propeller.
- a helical screen can be arranged so regular around the conductors to be protected. So the impedance of the cable is regularly distributed along its length.
- the invention overcomes these drawbacks.
- the protective screen comprises a first conductive tape wound in a helix with a also in that a second conductive tape is also wound in a helix, in the same direction, so as to cover the and the longitudinal edges of the first ribbon.
- the outer tape also has a already.
- the cable keeps a good flexibility, unlike a cable with a ribbon screen wound in a helix with superimposed turns.
- each ribbon has an insulating support, for example polyester, and a layer metallic, for example aluminum, and the ribbons are arranged so that the metal layers are in contact.
- insulating support for example polyester
- metallic for example aluminum
- the width of the second ribbon is substantially equal to the width of the first ribbon.
- the cable according to the invention can also comprise at least two conductor sets, each conductor set protected by a screen with two ribbons.
- a cable is provided with two pairs, or two-fourths, of conductors.
- a quarter is a set of 4 conductors.
- These conductors are intended to transmit frequencies high up to 500 GHz or even 1 GHz.
- Each pair, or each quarter, is protected by a conductive screen intended to oppose crosstalk as well as protect each pair or quarter against disturbance outside.
- the screen comprises a first strip 12 wound helically around a pair of conductors 10.
- This first strip 12 is wound at a distance, that is to say that the successive turns 12 1 , 12 2 , ... etc. do not overlap but provide an interval 14 1 , 14 2 ... etc., which, in the example, has a width equal to approximately half the width l of the ribbon.
- the ribbon 12 is formed by a support 16 made of polyester and of a layer 18 of aluminum. Layer 18 faces outward.
- the screen further comprises a second ribbon 20 intended to cover the gaps 14 1 , 14 2 . It is therefore wound in a helix.
- the winding direction is the same as that of the ribbon 12.
- this ribbon 20 also has gaps 22 1 , 22 2 ... etc.
- the ribbon 20 is, like the ribbon 12, formed of a substrate 20 1 made of polyester and a metallic layer 20 2 made of aluminum.
- the layer 20 2 of aluminum is turned inward. In this way, this metallic layer 20 2 comes into contact with the outer metallic layer 18 of the ribbon 12.
- the ribbon 20 can be identical to the ribbon 12.
- the screen is more flexible.
- the metallic contact between the outer tape and the inner tape provides good frequency protection high, the dimensions of the screen openings being minimized.
- a continuity wire (not shown) is provided under the cable sheath, a braid covering the whole armored pairs or quads, or any other conventional means.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Communication Cables (AREA)
- Insulated Conductors (AREA)
Abstract
Description
Claims (7)
- Câble comportant au moins un écran de protection d'au moins un conducteur électrique contre les perturbations électromagnétiques extérieures ou contre les perturbations provenant d'autre(s) conducteur(s) dans le même câble, cet écran comprenant un ruban enroulé en hélice, caractérisé en ce que l'écran comporte, d'une part, un premier ruban (12) enroulé en hélice à déjoint et, d'autre part, un second ruban (20) enroulé dans le même sens et recouvrant les déjoints (141, 142) ainsi que les bords du premier ruban.
- Câble selon la revendication 1, caractérisé en ce que le déjoint (141, 142) du premier ruban conducteur est environ la moitié de la largeur de ce ruban.
- Câble selon la revendication 1 ou 2, caractérisé en ce que la largeur du second ruban (20) est sensiblement égale à la largeur du premier ruban (12).
- Câble selon l'une quelconque des revendications précédentes, caractérisé en ce que chacun des rubans présente un support en matière plastique, par exemple en polyester, et une couche métallique, par exemple en aluminium.
- Câble selon la revendication 4, caractérisé en ce que les couches métalliques (18, 202) des deux rubans sont en contact.
- Câble selon l'une quelconque des revendications précédentes, caractérisé en ce que le second ruban (20) présente également un déjoint (221, 222).
- Câble selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte au moins deux ensembles de conducteur(s), et en ce chaque ensemble de conducteur(s) est protégé par un écran à deux rubans.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9703750 | 1997-03-27 | ||
| FR9703750A FR2761514B1 (fr) | 1997-03-27 | 1997-03-27 | Cable a conducteur protege par un ecran a ruban |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0867892A1 true EP0867892A1 (fr) | 1998-09-30 |
| EP0867892B1 EP0867892B1 (fr) | 2002-09-18 |
Family
ID=9505229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19980400710 Expired - Lifetime EP0867892B1 (fr) | 1997-03-27 | 1998-03-26 | Câble destiné à transmettre des données à des fréquences élevées à conducteur protégé par un écran à ruban |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0867892B1 (fr) |
| DE (1) | DE69807965T2 (fr) |
| FR (1) | FR2761514B1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5332380B2 (ja) * | 2008-07-30 | 2013-11-06 | 日本電気株式会社 | 同軸ケーブル |
| DE102017220021A1 (de) * | 2017-11-10 | 2019-05-16 | Leoni Kabel Gmbh | Kabel mit wenigstens einer Kabelader und einem Kabelmantel und Verfahren zum Herstellen eines Kabels mit wenigstens einer Kabelader und einem Kabelmantel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR956024A (fr) * | 1941-10-30 | 1950-01-23 | ||
| WO1995018454A1 (fr) * | 1993-12-30 | 1995-07-06 | Mohawk Wire And Cable Corporation | Cable blinde a deux rubans metalliques et a conducteurs independants pour transmission de donnees a grande vitesse |
-
1997
- 1997-03-27 FR FR9703750A patent/FR2761514B1/fr not_active Expired - Fee Related
-
1998
- 1998-03-26 DE DE1998607965 patent/DE69807965T2/de not_active Expired - Fee Related
- 1998-03-26 EP EP19980400710 patent/EP0867892B1/fr not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR956024A (fr) * | 1941-10-30 | 1950-01-23 | ||
| WO1995018454A1 (fr) * | 1993-12-30 | 1995-07-06 | Mohawk Wire And Cable Corporation | Cable blinde a deux rubans metalliques et a conducteurs independants pour transmission de donnees a grande vitesse |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2761514B1 (fr) | 1999-04-30 |
| DE69807965T2 (de) | 2003-06-05 |
| EP0867892B1 (fr) | 2002-09-18 |
| DE69807965D1 (de) | 2002-10-24 |
| FR2761514A1 (fr) | 1998-10-02 |
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