EP0485920A1 - Elektrisches Kabel mit hoher Übertragungsgeschwindigkeit - Google Patents

Elektrisches Kabel mit hoher Übertragungsgeschwindigkeit Download PDF

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Publication number
EP0485920A1
EP0485920A1 EP91119172A EP91119172A EP0485920A1 EP 0485920 A1 EP0485920 A1 EP 0485920A1 EP 91119172 A EP91119172 A EP 91119172A EP 91119172 A EP91119172 A EP 91119172A EP 0485920 A1 EP0485920 A1 EP 0485920A1
Authority
EP
European Patent Office
Prior art keywords
conductors
rod
rods
conductor
insulating
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
EP91119172A
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English (en)
French (fr)
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EP0485920B1 (de
Inventor
Daniel Prudhon
Victor Da Silva
Pierre Frieden
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.)
Filotex SA
Original Assignee
Filotex SA
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 Filotex SA filed Critical Filotex SA
Publication of EP0485920A1 publication Critical patent/EP0485920A1/de
Application granted granted Critical
Publication of EP0485920B1 publication Critical patent/EP0485920B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01B11/002—Pair constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0233—Cables with a predominant gas dielectric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0241—Disposition of insulation comprising one or more helical wrapped layers of insulation

Definitions

  • the invention relates to an electrical cable with high propagation speed, such as those used for transmitting data from one computer machine to another.
  • To produce a cable having a high propagation speed it is known to reduce the linear capacity existing between two conductors of this cable, by increasing the distance between these conductors and the distance between these conductors and the screen; and by reducing the average value of the permittivity of the dielectrics located between these two conductors along the cable.
  • This cable is bulky because the insulating core has a diameter much greater than the diameter of each of the 4 conductors. It maintains a predetermined distance between the conductors, so as to reduce the linear capacity between the conductors.
  • the core and the first insulating layer may be made of polytetrafluoroethylene expanded.
  • the object of the invention is to provide a cable having a high propagation speed, without having the disadvantages of cables of known types.
  • the object of the invention is an electric cable with a high propagation speed comprising a plurality of conductors and means for maintaining a predetermined distance between said conductors; characterized in that two insulating rods enclosing two neighboring conductors rotate in the same direction and have the same constant pitch, and are nested, the rod enclosing a conductor also bears against the other conductor.
  • the object of the invention is also a cable characterized in that two insulating rods enclosing two neighboring conductors rotate in opposite directions and have different pitches, not multiple from one another, so as never to be nest.
  • the turns of rod 1 and rod 4 respectively enclose conductors 2 and 3.
  • Each of rods 3 and 4 is made from a straight cylindrical rod with circular section which is wound around one of conductors 2 or 3.
  • Each rod 1 and 4 therefore encloses one of the conductors in these turns.
  • the two rods 1 and 4 are wound with the same pitch which is constant and which is much greater than the diameter of the section of each rod, so that the free volume between the turns is much greater than the volume occupied by the turns.
  • the conductors 2 and 3, enclosed in the rods 1 and 4 are brought together by nesting the turns of the rods, so that the rod 1 enclosing the conductor 2 is also in abutment against the conductor 3.
  • the rod 4 enclosing the conductor 3 is also in abutment against the conductor 2.
  • FIG. 2 represents a section of this exemplary embodiment, in the direction of view II II. This section shows that the two conductors, 2 and 3, are kept at a predetermined distance by the diameter of the section of the rod 1 and the rod 4. The geometric envelope of these turns is shown in dotted lines. The distance between the axes of conductors 2 and 3 is substantially equal to the sum of the diameter of a conductor and the diameter of the section of each of the rods 1 and 4.
  • the diameter of the rods can be chosen so as to separate the conductors, to reduce the linear capacity. But, above all, this type of cable makes it possible to reduce the linear capacity by reducing the average permittivity.
  • the turns of the rods 1 and 4 occupy only a small portion of the volume located between the two conductors 2 and 3, the rest being filled with air because the insulating material constituting the envelope 5 does not penetrate into the space located between the turns. Consequently, the average permittivity of this volume is lower than that of the polyethylene constituting the two rods.
  • the average permittivity obtained is 1 , 2 while that of solid polyethylene is 2.28.
  • the characteristic impedance is 150 ohms for frequencies above 1 MHz.
  • the cable according to the invention can have a smaller footprint than a cable of known type, at equal speed, with equal attenuation, and with equal impedance.
  • This exemplary embodiment can be coated with an electrical screen of a conventional type, and it can be twisted like a conventional pair.
  • Alternative embodiments may consist in replacing the sheath 5 of extruded polyethylene by an insulating tape wound in a helix. It is possible to prevent the effect of the humidity of the air contained in the cavities between the turns of rods 1 and 4, by depositing in these cavities a small amount of a powder which swells while absorbing moisture, and which is conventionally used to protect, from humidity, the interior of coaxial cables comprising a solid dielectric having a helical shape.
  • the two embodiments described above only have one pair of conductors, but the scope of the invention is not limited to this type of cable.
  • To make a cable with four conductors it is within the reach of ordinary skill in the art to nest four conductors each provided with a rod of helical shape, the axes of the four conductors being preferably placed in a square. It is also possible to produce a multiconductor cable by placing conductors, each provided with a helical rod, so that the axes of the conductors are in the same plane.
  • this cable is similar to those of the cable described with reference to Figure 1, but the two rods do not rotate in the same direction and have different pitches. In addition, the steps are different from a multiple of each other, so that the two rods cannot overlap.
  • a turn of the rod 1 '' and a turn of the rod 4 '' are in contact at a point 6, while the neighboring turns are not in contact because of the difference in pitch .
  • the turns in contact are numerous enough to separate the two rods, and therefore the two conductors.
  • Figure 5 shows a sectional view of this third embodiment, in the direction of view VV.
  • the rods 1 '' and 4 '' each having a cross section which is circular, the width of the space which separates the conductors 2 '' and 3 '' is substantially equal to twice the diameter of this cross section. If we compare the linear capacity between the conductors of the third embodiment, and the linear capacity of the conductors of the first embodiment, the capacity is divided by 2, for identical conductors and rods having an identical diameter of their cross section.
  • the rod 22 is wound in the opposite direction to the direction of stranding of the conductors 21. Its function is to separate the conductors 21 from the screen 23 without the permittivity of the space between the conductors 21 and the screen 23 being very different that of air, unlike conventional solutions consisting in using polyester, polyethylene or polypropylene insulating tapes, solid or expanded.
  • Each conductor 21 can be isolated individually by a continuous sheath, made of polyethylene for example, but it can also be isolated by a rod of helical shape similar to those described above with reference to FIG. 1 and to FIG. 4. Many variants are within the reach of ordinary skill in the art, such as for example the use of a screen placed lengthwise, instead of a screen placed helically.
  • Figure 7 shows a sectional view of the third embodiment, in the direction of view VII VII. It shows that the rod 22 separates all of the conductors 21 of the screen 23 by a space whose width is substantially equal to the diameter of the cross section of the rod 22. As shown in these figures, the proportion of insulating material present between the conductors 21 and the screen 23 is low, therefore the average permittivity of this space remains close to that of air.
  • the cable By appropriately choosing the characteristics of the rod, or rods, it is possible to give the cable an average density of less than 1 so that the cable can float.

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  • Communication Cables (AREA)
EP91119172A 1990-11-14 1991-11-11 Elektrisches Kabel mit hoher Übertragungsgeschwindigkeit Expired - Lifetime EP0485920B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9014171 1990-11-14
FR9014171A FR2669143B1 (fr) 1990-11-14 1990-11-14 Cable electrique a vitesse de propagation elevee.

Publications (2)

Publication Number Publication Date
EP0485920A1 true EP0485920A1 (de) 1992-05-20
EP0485920B1 EP0485920B1 (de) 1995-08-02

Family

ID=9402191

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119172A Expired - Lifetime EP0485920B1 (de) 1990-11-14 1991-11-11 Elektrisches Kabel mit hoher Übertragungsgeschwindigkeit

Country Status (4)

Country Link
US (1) US5286923A (de)
EP (1) EP0485920B1 (de)
DE (1) DE69111750T2 (de)
FR (1) FR2669143B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998028756A1 (en) * 1996-12-23 1998-07-02 Marco Verdi Cables for high-fidelity audio systems
EP0999557A1 (de) * 1998-11-05 2000-05-10 Sagem Sa Paar oder Vierer Hochfrequenzübertragungskabel

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US5527996A (en) * 1994-06-17 1996-06-18 Digital Equipment Corporation Apparatus for increasing SCSI bus length by increasing the signal propogation velocity of only two bus signals
US5740198A (en) * 1994-06-17 1998-04-14 Digital Equipment Corporation Apparatus for increasing SCSI bus length through special transmission of only two bus signals
US5742002A (en) * 1995-07-20 1998-04-21 Andrew Corporation Air-dielectric coaxial cable with hollow spacer element
US5872334A (en) * 1997-03-14 1999-02-16 International Business Machines Corporation High-speed cable
DE19724685C1 (de) * 1997-06-03 1998-12-24 Volkswagen Ag Verfahren zur Herstellung eines flexiblen Leitungsstranges
US6506976B1 (en) * 1999-09-14 2003-01-14 Avaya Technology Corp. Electrical cable apparatus and method for making
US7214880B2 (en) 2002-09-24 2007-05-08 Adc Incorporated Communication wire
US20040055777A1 (en) 2002-09-24 2004-03-25 David Wiekhorst Communication wire
US7511225B2 (en) 2002-09-24 2009-03-31 Adc Incorporated Communication wire
KR20120053543A (ko) * 2003-07-11 2012-05-25 팬듀트 코포레이션 개선된 패치 코드를 갖는 타선로 누화 억제 시스템
US7115815B2 (en) * 2003-10-31 2006-10-03 Adc Telecommunications, Inc. Cable utilizing varying lay length mechanisms to minimize alien crosstalk
US7214884B2 (en) * 2003-10-31 2007-05-08 Adc Incorporated Cable with offset filler
US7238885B2 (en) * 2004-12-16 2007-07-03 Panduit Corp. Reduced alien crosstalk electrical cable with filler element
US7064277B1 (en) 2004-12-16 2006-06-20 General Cable Technology Corporation Reduced alien crosstalk electrical cable
US7157644B2 (en) * 2004-12-16 2007-01-02 General Cable Technology Corporation Reduced alien crosstalk electrical cable with filler element
US7317163B2 (en) * 2004-12-16 2008-01-08 General Cable Technology Corp. Reduced alien crosstalk electrical cable with filler element
EP1851775A1 (de) * 2005-02-14 2007-11-07 Panduit Corporation Kabelsysteme und verfahren zur erweiterten kommunikation
US7259993B2 (en) * 2005-06-03 2007-08-21 Infineon Technologies Ag Reference scheme for a non-volatile semiconductor memory device
SE529502C2 (sv) * 2005-08-02 2007-08-28 Supachai Molander Förfarande för att framställa en ledning samt ledning framställd med förfarandet
US7271344B1 (en) * 2006-03-09 2007-09-18 Adc Telecommunications, Inc. Multi-pair cable with channeled jackets
US7375284B2 (en) * 2006-06-21 2008-05-20 Adc Telecommunications, Inc. Multi-pair cable with varying lay length
US7411131B2 (en) * 2006-06-22 2008-08-12 Adc Telecommunications, Inc. Twisted pairs cable with shielding arrangement
US7525041B2 (en) * 2006-09-21 2009-04-28 General Electric Company Method and apparatus for resonance frequency response attenuation
US7816606B2 (en) * 2007-07-12 2010-10-19 Adc Telecommunications, Inc. Telecommunication wire with low dielectric constant insulator
US9418775B2 (en) 2008-03-19 2016-08-16 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
US7982132B2 (en) * 2008-03-19 2011-07-19 Commscope, Inc. Of North Carolina Reduced size in twisted pair cabling
US9978480B2 (en) 2008-03-19 2018-05-22 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
CA2724528C (en) 2008-07-03 2017-03-28 Adc Telecommunications, Inc. Telecommunications wire having a channeled dielectric insulator and methods for manufacturing the same
US8344255B2 (en) * 2009-01-16 2013-01-01 Adc Telecommunications, Inc. Cable with jacket including a spacer
CN203631172U (zh) 2011-04-07 2014-06-04 3M创新有限公司 高速传输电缆
US10839981B2 (en) 2011-04-07 2020-11-17 3M Innovative Properties Company High speed transmission cable
US20140060882A1 (en) * 2012-08-31 2014-03-06 Tyco Electronics Corporation Communication cable having at least one insulated conductor
FR3011670A1 (fr) * 2013-10-09 2015-04-10 Labinal Harnais electrique a faible capacite lineique
US9293239B2 (en) * 2013-12-24 2016-03-22 Belden Inc. Semi-solid balanced audio cable
US9748022B2 (en) 2013-12-24 2017-08-29 Belden Inc. Semi-solid balanced audio cable
EP3350813A1 (de) * 2015-11-17 2018-07-25 LEONI Kabel GmbH Datenkabel für high-speed datenübertragungen
US10472742B1 (en) * 2016-02-17 2019-11-12 Apple Inc. Fabric-based items with fusible insulating strands
US9922751B2 (en) * 2016-04-01 2018-03-20 Intel Corporation Helically insulated twinax cable systems and methods
DE102018103607B4 (de) 2018-02-19 2023-12-07 Bizlink Industry Germany Gmbh Zweidrahtleitung mit verschachtelter Isolierung, sowie Verfahren und Vorrichtung zum Herstellen einer Zweidrahtleitung
JP6908184B2 (ja) * 2018-04-25 2021-07-21 ダイキン工業株式会社 撚り電線およびその製造方法
JP7416357B2 (ja) * 2018-05-16 2024-01-17 サンコ テキスタイル イスレットメレリ サン ベ ティク エーエス 静電容量式タッチセンシング用の位置検出用複合糸

Citations (3)

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DE599312C (de) * 1930-11-06 1934-07-30 Siemens Schuckertwerke Akt Ges Verfahren zur Herstellung von luftisolierten Doppeladern fuer Fernmeldekabel
FR810882A (fr) * 1935-08-12 1937-04-01 Lignes Telegraph Telephon Conducteur de haute fréquence à isolement d'air
US2348752A (en) * 1940-09-17 1944-05-16 Int Standard Electric Corp Electric cable

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NL48345C (de) * 1934-07-17
US2118907A (en) * 1935-07-02 1938-05-31 Felten & Guilleaume Carlswerk Multicore high frequency conductor
FR815143A (fr) * 1935-12-18 1937-07-06 Lignes Telegraph Telephon Cordelette en matière isolante
GB570349A (en) * 1943-10-27 1945-07-03 Communications Patents Ltd Improved coaxial electric cable and systems comprising such cable
US2614172A (en) * 1948-06-12 1952-10-14 Anaconda Wire & Cable Co High impedance shielded twin conductor cable
DE2104600C3 (de) * 1971-02-01 1973-09-13 Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften E.V., 3400 Goettingen Elektrischer Leiter für supraleitende Wicklungen oder Schaltstrecken, und Verfahren zur Herstellung eines solchen Leiters
DE3216233A1 (de) * 1982-04-30 1983-11-03 Siemens AG, 1000 Berlin und 8000 München Lichtwellenleiterkabel mit einem schichtenmantel
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Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE599312C (de) * 1930-11-06 1934-07-30 Siemens Schuckertwerke Akt Ges Verfahren zur Herstellung von luftisolierten Doppeladern fuer Fernmeldekabel
FR810882A (fr) * 1935-08-12 1937-04-01 Lignes Telegraph Telephon Conducteur de haute fréquence à isolement d'air
US2348752A (en) * 1940-09-17 1944-05-16 Int Standard Electric Corp Electric cable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998028756A1 (en) * 1996-12-23 1998-07-02 Marco Verdi Cables for high-fidelity audio systems
EP0999557A1 (de) * 1998-11-05 2000-05-10 Sagem Sa Paar oder Vierer Hochfrequenzübertragungskabel
FR2785715A1 (fr) * 1998-11-05 2000-05-12 Sagem Cable de transmission a haute frequence a paire ou quarte

Also Published As

Publication number Publication date
FR2669143B1 (fr) 1995-02-10
DE69111750T2 (de) 1996-01-04
DE69111750D1 (de) 1995-09-07
FR2669143A1 (fr) 1992-05-15
US5286923A (en) 1994-02-15
EP0485920B1 (de) 1995-08-02

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