EP2697803A1 - Câble à quarte en étoile comportant un blindage - Google Patents

Câble à quarte en étoile comportant un blindage

Info

Publication number
EP2697803A1
EP2697803A1 EP12703976.6A EP12703976A EP2697803A1 EP 2697803 A1 EP2697803 A1 EP 2697803A1 EP 12703976 A EP12703976 A EP 12703976A EP 2697803 A1 EP2697803 A1 EP 2697803A1
Authority
EP
European Patent Office
Prior art keywords
shield
conductors
screen
core
wires
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
Application number
EP12703976.6A
Other languages
German (de)
English (en)
Other versions
EP2697803B1 (fr
Inventor
Gunnar Armbrecht
Helmut Reiter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rosenberger Hochfrequenztechnik GmbH and Co KG
Original Assignee
Rosenberger Hochfrequenztechnik GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rosenberger Hochfrequenztechnik GmbH and Co KG filed Critical Rosenberger Hochfrequenztechnik GmbH and Co KG
Publication of EP2697803A1 publication Critical patent/EP2697803A1/fr
Application granted granted Critical
Publication of EP2697803B1 publication Critical patent/EP2697803B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • H01B11/1041—Screens specially adapted for reducing interference from external sources composed of a helicoidally wound wire-conductor
    • 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
    • H01B11/005—Quad constructions
    • 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
    • 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
    • H01B11/1033—Screens specially adapted for reducing interference from external sources composed of a wire-braided conductor

Definitions

  • the present invention relates to a star quad cable for transmitting electrical signals with at least two pairs of electrical conductors, wherein each conductor comprises a core of an electrically conductive material and a conductor surrounding the wire conductor shell of an electrically insulating material, wherein the conductors in a Cross section of the star quad cable are arranged at the corners of a square, wherein the conductors of a pair are arranged at diagonally opposite corners of the square, wherein four conductors are twisted together according to a star quad array with a predetermined stranding factor, wherein one of the two pairs of Conductors radially outwardly surrounding screen is disposed of an electrically conductive material, wherein the screen is constructed of a mesh of individual shield wires, according to the preamble of claim 1.
  • a so-called "star quad” is a stranding element for conductors with, for example, copper wires.
  • Four conductors of pairs of conductors are twisted together to form two cross-shaped stranded double conductors. Two opposing conductors form a pair, each transmitting an electrical signal on a pair.
  • the four conductors in the cross section of the star quad are arranged at the corners of a square, wherein the conductors of a pair are arranged at diagonally opposite corners.
  • the quad-core cable is one of the balanced cables.
  • this cable four conductors are stranded with each other in a cross shape. This means that the opposite conductors each form a conductor pair. Due to the mutually perpendicular conductor pairs only very low crosstalk occurs.
  • Another advantage of the star quad stranding is, in addition to the mechanical stabilization of the arrangement of the conductors relative to one another, the higher packing density than in a pair stranding. The stranding makes the conductors or individual wires longer than the cable itself.
  • Stranding factor specifies the ratio of single-conductor length to cable length.
  • the stranding factor for telecommunications cables for example, about 1, 02 bis
  • the stranding factor correlates with a pitch
  • the pitch or slope or pitch indicates a thread at an axial distance of two thread notches.
  • the invention is based on the object, a star quad cable og. To improve the type of electrical properties for the transmission of electrical signals.
  • At least one shield core or at least one shield core bundle is so radial the conductor is stranded surrounding that at least one of the stranded shield wires or one of the shield wire bundles in the axial direction in each case runs parallel to a wire (18) of a conductor.
  • a further improvement of the electrical properties or the transmission characteristic of the four-wire cable is achieved by stranding at least four shield wires or at least four shielding wires radially surrounding the conductors such that at least one of the stranded shielding wires or one of the shielding wire bundles is in each case in the axial direction runs parallel to a wire of a conductor.
  • a particularly secure guidance of the shield wires or shielding wire bundles in parallel along a respective wire of a conductor even at bending and torsional loads of the four-wire cable is achieved in that the screen core or shield wires or the / the shield core bundles is / are stranded with a stranding factor, which corresponds to a stranding factor of the ladder.
  • a particularly good conduction of shield currents assigned to one core each is achieved in that a respective shield core or a shield core on the one hand and a core on the other hand extend parallel to one another in the axial direction such that the shield core or the shield core bundle and the core are cross-sectioned at each point of the cable lie on the same diagonal of the square and the screen core or the shield wire bundle is arranged on a side facing away from the square side of the wire.
  • Good electrical conductivity coupled with low manufacturing costs is achieved by making the wires from copper.
  • a reduction of shielding currents with corresponding improvement of the transmission characteristics of the star quad cable and maintaining the transmission characteristics of the star quad cable even with bending and torsional loads that affect the screen mechanically obtained by the fact that between the conductors and the screen an additional insulator jacket is arranged from an electrically insulating material. Settling phenomena in the quad-core cable are avoided and stripping of the quad-core cable is simplified since there is a reduced risk of damaging the wires when cutting an outer insulation jacket.
  • the additional insulator jacket generates a radial bias on the conductor sheaths of the cores, whereby a mechanical stability of the star quad assembly is increased in bending and torsional loads.
  • a further improvement of the transmission characteristic of the star quad cable by enabling additional electrical compensation currents on the screen is achieved by the fact that radially outward on the screen, a second screen is arranged, which is electrically conductively connected to the screen.
  • a particularly large-scale conduction of equalizing currents across the second screen is achieved in that the second screen is formed as a sheath or foil of an electrically conductive material.
  • a particularly good preservation of the flexibility of the star quad cable despite the second screen is achieved in that the second screen is constructed from a network of individual second shield wires.
  • a high number of electrical contact points between the second screen cores of the second screen and the screen cores of the radially inner screen are achieved by the fact that the second shield cores in opposite directions to the Shielding cores of the screen, in particular with a stranding factor, which corresponds to the stranding factor of the shield wires of the screen are stranded.
  • FIG. 1 shows an exemplary embodiment of a star quad cable according to the invention in perspective view
  • FIG. 2 shows the star quad cable according to FIG. 1 in a schematic sectional view
  • Fig. 3 is a schematic sectional view of a conventional star quad cable with a graphical representation of the distribution of an electric field
  • a schematic sectional view of a star quad cable according to the invention with a graphical representation of the distribution of an electric field
  • a graph of transmission of an electrical signal in dependence a frequency for the conventional star quad cable according to FIG. 3 a graphic representation of a transmission of an electrical signal as a function of a frequency for the star quad cable according to the invention according to FIG. 4 and FIG
  • Fig. 7 is a simplified schematic representation of stranded together
  • a star quad cable according to the invention comprises four conductors 10, 12, 14, 16, each a core 18 made of an electrically conductive material and a conductor shell 20 made of an electrically insulating material.
  • the conductors 10, 12, 14, 16 are twisted together to form a star quad array, ie at each point in the cross section of the four-wire cable are the conductors 10, 12, 14, 16 at a corner of a square 17.
  • FIG. 2 shows a coordinate system with an x-axis 40 and a y-axis 42.
  • the coordinate system 40, 42 is arranged such that the origin 44 of the coordinate system 40, 42 lies exactly on the longitudinal axis of the star quad cable, so that this longitudinal axis forms a z-direction in space for the coordinate system 40, 42.
  • a first signal is transmitted to the first pair of conductors 10, 12, and a second signal is transmitted to the second pair of conductors 14, 16.
  • a corresponding phase shift between the first and second signal and the previously described spatial arrangement of the conductors 10, 12, 14, 16 relative to each other in a star quad array is in a known manner, a high crosstalk attenuation between the two conductor pairs 10, 12 and 14, 16 achieved.
  • the signals on the conductor pairs 10, 12 and 14, 16 have a phase shift of 180 °.
  • the stranded conductors 10, 12, 14, 16 surrounding radially outside a screen 22 is arranged, which is composed of discrete or individual shield wires 23.
  • a jacket 25 made of an electrically insulating material surrounds radially outside the entire structure of conductors 10, 12, 14, 16 and screen 22.
  • a additional insulating jacket 24 disposed of an electrically insulating material. This creates an additional spatial distance in the radial direction between the wires 18 of the conductors 10, 12, 14, 16 on the one hand and the screen 22 on the other. The resulting effect will be explained below with reference to FIGS. 3 and 4.
  • Fig. 3 is a schematic sectional view of a conventional star quad cable with conductors 10, 12, 14, 16 with respective wires 18 and conductor shrouds 20 and a screen 22 is shown.
  • the screen 22 is radially outward directly on the conductor shrouds 20 of the conductors 10, 12, 14, 16, so that there is a minimum radial distance between the wires 18 and the screen 22.
  • Arrows show the distribution of an electric field when transmitting corresponding electrical signals via the conductors 10, 12, 14, 16, the greater the electric field, the larger the respective arrow is shown. It can be seen from Fig. 3 that forms a strong electric field between the wires 18 of the second pair of conductors 14, 16 and the screen 22.
  • Screen currents This indicates correspondingly high electrical currents along the screen 22, which are referred to below as "screen currents".
  • High shield currents lead to all the effects that affect the screen 22, a high degree of influence on the electrical characteristics or the transmission characteristics of the four-star cable result.
  • bending and torsional stresses of the star quad cable which result in mechanical deformation or even damage to the screen 22, lead to a severe deterioration of the electrical characteristics of the four-wire cable, although the cores of the star quad Cable may not be affected by mechanical changes or damage.
  • the screen 22 is usually formed as a mesh of individual shield wires 23 and shield currents must, for example, to follow a wire 18 at contact points of shield wires 23 from a shield wire 23 to another switch.
  • FIG. 4 shows, in an analogous view as in FIG. 3, the distribution of the electric field for a star quad cable designed according to the invention with the additional insulator jacket 24.
  • the screen 22 has a greater radial distance from the cores 18 than the conventional embodiment of a star quad cable according to FIG. 3 through the additional insulating jacket 24 arranged between the conductors 10, 12, 14, 16 on the one hand and the screen 22 on the other hand.
  • the electric field is now concentrated between the conductors 10, 12, 14, 16.
  • FIGS. 5 and 6 a frequency in [GHz] is plotted on a horizontal axis 26, and a transmission in [dB] on a vertical axis 28 for electrical signals.
  • a first graph 30 in FIG. 5 illustrates the transmission 28 as a function of the frequency 26 in a common mode signal transmission (without phase shift between the signals on the conductor pairs 10, 12 and 14, 16) and a second graph 32 5 illustrates the transmission 28 as a function of the frequency 26 in a differential mode signal (with phase shift between signals on the conductor pairs 10, 12 and 14, 16) each for a
  • FIG. 6 illustrates the transmission 28 as a function of the frequency 26 in a common mode signal transmission - without phase shift between the signals on the conductor pairs 10, 12 and 14, 16) and a fourth graph 36 in FIG. 6 illustrates the transmission 28 as a function of the frequency 26 in a differential mode signal transmission (with phase shift between the signals on the conductor pairs 10, 12 and 14, 16).
  • the graphs 30, 32, 34 and 36 are each obtained from simulations for the arrangement according to FIGS. 3 and 4.
  • second graph 32 in the case of a conventional star quad cable, a transmission breakdown occurs in a push-pull at approximately 2.9 GHz. This burglary is no longer present in a star quad cable according to the invention, as shown in Fig. 6, fourth graph 26 can be seen.
  • This simulation result impressively shows the resounding and unexpected improvement in the electrical properties of the star quad cable according to the invention in the transmission of electrical signals. This improvement is already given here before damage or aging of the screen.
  • a significant improvement in the electrical properties or the transmission properties of the quad-core cable for electrical signals is achieved in that, according to the invention, at least individual shield wires 23 each follow one of the conductors 10, 12, 14, 16 in parallel.
  • at least individual shield conductors 23 are stranded with the same lay length s or the same stranding factor as the conductors 10, 12, 14, 16. This is illustrated by way of example for a shield core 23a in FIG. In Fig. 7, the lay length s 46 is illustrated.
  • the shield core 23a helically winds around the conductors 10, 12, 14, 16 through the stranding such that the shield core 23a extends parallel to the conductor 14.
  • the exact relative arrangement between the shield wire 23a and the conductor 14 can be seen in FIG.
  • the shield core 23a winds around the conductors 10, 12, 14, 16 at any point in the cross-section of the quad-core cable the conductor 14 and the shield wire 23a are on a common diagonal 19 and the shield wire 23a is disposed on a side of the conductor 14 facing away from the square 17.
  • a shield current assigned to the conductor 14 can follow the conductor 14 without transition to another shield core 23.
  • the electrical conduction of the shielding current across the shield 22 improves and overall the electrical properties and / or the transfer characteristic of the four-core cable for the transmission of electrical signals is improved. In particular, for example, results in a low attenuation for the electrical useful signal transmitted by the star quad cable according to the invention.
  • the square 17 has, for example, a side length a 48 of 0.83 mm. These side length a corresponding to the distance of the center points of two adjacent conductors 10, 12, 14, 16.
  • the shield core 23a is preferred for guiding the shield current associated with the conductor 14, this shield current of the conductor 14 may also be guided by one of the two shield conductors 23 adjacent to the shield core 23a. Thus, should the shield core 23a be damaged due to bending or torsional loading, the shield current may still flow substantially parallel to the conductor 14 across the shield 22 along the shield conductors 23a without having to make a change to another shield core 23.
  • a lay length s 46 is for example 40 mm.
  • a second screen (not shown) made of an electrically conductive material is additionally arranged radially on the outside of the screen 22.
  • This second screen is thereby electrically conductively connected to the screen 22 on its radially inner side, so that electrical compensation currents can flow over the second screen.
  • manufacturing tolerances are compensated, which, for example, result in that the shield core 23a does not run exactly parallel to the associated conductor 14 (FIG. 2).
  • the equalizing currents over the second screen By means of the equalizing currents over the second screen, aging phenomena or damage to the screen 22 can be compensated accordingly.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Communication Cables (AREA)
  • Insulated Conductors (AREA)

Abstract

L'invention concerne un câble à quarte en étoile pour la transmission de signaux électriques, comportant au moins deux paires de conducteurs électriques (10, 12, 14, 16), chacun des conducteurs (10, 12, 14, 16) comprenant une âme (18) faite dans un matériau électroconducteur et une gaine (20) qui entoure radialement l'âme (18), faite dans un matériau électriquement isolant. Les conducteurs (10, 12, 14, 16), dans une coupe transversale du câble à quarte, sont disposés dans les coins d'un carré, et les conducteurs (10, 12, 14, 16) d'une paire se situent dans les coins opposés diagonalement du carré. Quatre conducteurs (10, 12, 14, 16) disposés dans l'agencement en quarte en étoile sont torsadés avec un facteur de torsion prédéterminé. Un blindage (22) fait dans un matériau électroconducteur entoure radialement sur l'extérieur les deux paires de conducteurs (10, 12, 14, 16), le blindage (22) étant fait d'un entrelacement de différents fils de blindage (23). Au moins un fil de blindage (23) ou au moins un faisceau de fils de blindage est toronné pour entourer radialement les conducteurs (10, 12, 14, 16) de manière qu'au moins l'un des fils de blindage (23) toronnés ou au moins un fil du faisceau de fils de blindage soit sensiblement parallèle, dans la direction axiale, à une âme d'un conducteur (10, 12, 14, 16).
EP12703976.6A 2011-04-14 2012-02-06 Câble à quarte en étoile comportant un blindage Active EP2697803B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202011005272U DE202011005272U1 (de) 2011-04-14 2011-04-14 Sternvierer-Kabel mit Schirm
PCT/EP2012/000533 WO2012139679A1 (fr) 2011-04-14 2012-02-06 Câble à quarte en étoile comportant un blindage

Publications (2)

Publication Number Publication Date
EP2697803A1 true EP2697803A1 (fr) 2014-02-19
EP2697803B1 EP2697803B1 (fr) 2015-11-18

Family

ID=45495295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12703976.6A Active EP2697803B1 (fr) 2011-04-14 2012-02-06 Câble à quarte en étoile comportant un blindage

Country Status (10)

Country Link
US (1) US9214262B2 (fr)
EP (1) EP2697803B1 (fr)
JP (1) JP5863943B2 (fr)
KR (1) KR101756254B1 (fr)
CN (1) CN103443874B (fr)
CA (1) CA2826211C (fr)
DE (1) DE202011005272U1 (fr)
HK (1) HK1191726A1 (fr)
TW (1) TWM436214U (fr)
WO (1) WO2012139679A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9991023B2 (en) 2013-01-29 2018-06-05 Creganna Unlimited Company Interconnect cable having insulated wires with a conductive coating
US20140209347A1 (en) * 2013-01-29 2014-07-31 Tyco Electronics Corporation Cable Having a Sparse Shield
JP7140074B2 (ja) * 2019-08-27 2022-09-21 日立金属株式会社 同軸ケーブル

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1995201A (en) * 1929-05-23 1935-03-19 Delon Jules Telephone cable with star quads
DE1725372U (de) * 1952-03-06 1956-07-05 Norddeutsche Kabelwerke A G Abschirmung fuer hochfrequenzkabel und -leitungen.
DE1019727B (de) 1952-05-07 1957-11-21 Siemens Ag Symmetrische Hochfrequenzleitung mit einem Schirm aus metallischem Geflecht
DE1490692A1 (de) * 1964-10-27 1969-07-03 Siemens Ag Aus einem einzigen Verseilelement mit einer einzigen Drallaenge bestehendes symmetrisches Kabel,insbesondere flexibles Traegerfrequenzkabel
NO158039C (no) * 1985-03-01 1988-06-29 Standard Tel Kabelfab As Borehulls-loggekabel.
DE19620024A1 (de) 1996-05-17 1997-11-20 Siemens Ag Nachrichtenkabel sowie Verfahren zu dessen Herstellung
JPH11144532A (ja) * 1997-11-11 1999-05-28 Furukawa Electric Co Ltd:The 電気通信ケーブル
DE20016527U1 (de) 2000-09-23 2000-11-30 Alcatel, Paris Elektrische Installationsleitung
CN2570930Y (zh) * 2002-09-16 2003-09-03 宝胜科技创新股份有限公司 耐高低温野外作业用五类缆
DE202011005273U1 (de) * 2011-04-14 2011-08-23 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Sternvierer-Kabel mit Schirm

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012139679A1 *

Also Published As

Publication number Publication date
DE202011005272U1 (de) 2011-12-20
US20140014392A1 (en) 2014-01-16
JP2014511016A (ja) 2014-05-01
US9214262B2 (en) 2015-12-15
CN103443874B (zh) 2016-05-18
CA2826211A1 (fr) 2012-10-18
HK1191726A1 (zh) 2014-08-01
WO2012139679A1 (fr) 2012-10-18
CN103443874A (zh) 2013-12-11
EP2697803B1 (fr) 2015-11-18
TWM436214U (en) 2012-08-21
KR101756254B1 (ko) 2017-07-10
CA2826211C (fr) 2017-05-30
JP5863943B2 (ja) 2016-02-17
KR20140027268A (ko) 2014-03-06

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