EP0554160B1 - Elektrisches Hochfrequenzkabel - Google Patents

Elektrisches Hochfrequenzkabel Download PDF

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Publication number
EP0554160B1
EP0554160B1 EP93400182A EP93400182A EP0554160B1 EP 0554160 B1 EP0554160 B1 EP 0554160B1 EP 93400182 A EP93400182 A EP 93400182A EP 93400182 A EP93400182 A EP 93400182A EP 0554160 B1 EP0554160 B1 EP 0554160B1
Authority
EP
European Patent Office
Prior art keywords
cable according
dielectric
cable
skin
around
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 - Lifetime
Application number
EP93400182A
Other languages
English (en)
French (fr)
Other versions
EP0554160A1 (de
Inventor
Michel Dunand
François Vaille
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 EP0554160A1 publication Critical patent/EP0554160A1/de
Application granted granted Critical
Publication of EP0554160B1 publication Critical patent/EP0554160B1/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
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0009—Details relating to the conductive cores
    • 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
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1808—Construction of the conductors
    • H01B11/183—Co-axial cables with at least one helicoidally wound tape-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
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1834—Construction of the insulation between the conductors
    • H01B11/1839—Construction of the insulation between the conductors of cellular structure

Definitions

  • the present invention relates to a high frequency electric cable, and in particular a coaxial or symmetrical pair cable.
  • High frequency electric cables occupying the smallest possible space, that is to say capable of withstanding bending stresses, and therefore significant curvatures, are more and more sought after at present with the aim of gain space, particularly in space, military or aeronautical applications.
  • these very flexible cables are required to have mechanical endurance (that is to say good resistance to stresses repeated periodically) and acceptable electrical performance taking into account the applications carried out.
  • a cable of this type is considered satisfactory from the point of view of its linear loss: the latter is of the order of 0.12 to 0.13 dB / m at 1 GHz for a cable 10 mm in diameter.
  • such a cable has a minimum radius of curvature equal to approximately eight times its outside diameter and poor mechanical endurance.
  • the massive core of the cable undergoes damaging degradations. It is moreover thanks to the use of a material of density greater than 1 for the envelope that the central core is mechanically maintained and makes it possible to guarantee the values of linear weakening given above when the radius of curvature imposed on the cable is equal to eight times its outside diameter.
  • the minimum radii of curvature reached are of the order of four to five times the outside diameter of the cable, which represents a significant gain compared to the preceding cables with massive core, and the mechanical endurance is improved.
  • the electrical performance of these cables is unsatisfactory compared to that of solid core cables.
  • the linear loss for a cable with a divided core whose central conductor has a diameter on core equal to the diameter of the massive core of the corresponding massive core cable is on the order of 30% higher than that of a cable with a solid core.
  • the internal conductors used in the various known high-frequency electrical cables do not make it possible to meet the requirements in terms of electrical performance at the same time (linear loss close to 0.12 to 0.13 dB / m at around 1 GHz for a cable 10 mm in diameter), and requirements for flexibility (minimum radius of curvature of the order of three to five times the outside diameter of the cable) and mechanical endurance.
  • the present invention therefore aims to achieve a high frequency electric cable having a linear loss comparable to that of cables with a solid core and a radius of curvature and mechanical endurance comparable to those of cables with a divided core.
  • the present invention proposes for this purpose a high frequency electric cable comprising at least one internal electrical conductor comprising a strand of conductive wires, characterized in that a metal strip is banded with overlap around said strand.
  • this metallic strip Thanks to this metallic strip, the flexibility of the divided core is preserved while ensuring a better distribution of the current densities on the surface of the conductor, which allows a better distribution of the electromagnetic field in the high frequency electric cable according to the invention; this guarantees along such a cable a linear attenuation greater than 10% at most than that of an identical cable having a massive core of the same diameter as that of the strand-ribbon assembly.
  • an envelope made of a dielectric material is arranged around the metal strip so as to hold it mechanically.
  • the dielectric skin can be obtained by extrusion or tape around the metal strip.
  • PTFE polytetrafluoroethylene
  • PFA perfluoroalkoxy resin
  • FEP ethylene copolymer and fluorinated propylene
  • ETFE ethylene tetrafluoroethylene
  • PEEK polyether ether ketone
  • PE polyethylene
  • PP polypropylene
  • the dielectric skin can also consist of a tape based on PTFE or a composite tape based on polyimide and PTFE, or polyimide and FEP, or polyimide and PFA resin, tape with covering around the tape metallic and whose turns may or may not be welded together.
  • the material constituting the dielectric skin is solid to allow sufficient mechanical retention of the metal strip.
  • the dielectric material constituting the envelope is preferably expanded and has a density less than half that of the same unexpanded material.
  • the cable is thus made more flexible.
  • a symmetrical pair cable according to the invention comprises two inner conductors assembled in a helix or arranged lengthwise and each surrounded by an envelope made of a dielectric material.
  • This material is preferably expanded and has a density less than half that of the same unexpanded material.
  • the assembly of the two conductors can be covered with a dielectric sheath.
  • the latter can also be surrounded by shielding.
  • the symmetrical pair cable thus formed can be protected by means of an external protective sheath made of an insulating material.
  • the ribbon 3 gives the divided core 2 electrical properties not far from those of a solid core while guaranteeing the cable 1 the same flexibility as a conventional divided core cable.
  • the linear weakening of cable 1 is of the order of 10% greater than that of a cable with a solid core in any point identical elsewhere, and the minimum radius of curvature reached is three to five times the outside diameter of the cable.
  • the cable according to the invention therefore makes it possible to combine the advantages of a cable with a solid core and those of a cable with a divided core.
  • the cable according to the invention allows optimal use thanks to the presence of a thin metal strip, compatible with skin thickness.
  • the dielectric skin 4 provides mechanical retention of the ribbon 3 when the cable 1 is subjected to bending stresses, which makes it possible to avoid, if necessary, the opening of the ribbon 3.
  • the opening tape 3 could cause undesirable variations in the linear weakening of the cable around its nominal value, and the envelope 5, generally made of a low density material (for electrical reasons), may not be sufficient to perform this maintenance.
  • the thin and rigid dielectric skin 4 is therefore used, made of a dielectric material to optionally hold the strip 3.
  • the invention is not limited to the embodiment which has just been described, and it can be applied, if the need arises, to other types of high frequency cables than cables. coaxial.
  • the invention applies for example to so-called symmetric pair cables (as opposed to coaxial cables which are sometimes called coaxial pair cables).
  • each of the inner conductors (cores) 12, 12 ′ of the cable 10 with symmetrical pair shown in FIG. 2 is surrounded by a metallic strip 13, 13 ′ then optionally by a dielectric skin 14, 14 ′ before d 'be isolated if necessary is by means of the casing 15, 15' of a dielectric material.
  • the dielectric skin can be obtained by tape or extrusion, and made of another dielectric material than PTFE. It can for example consist of a ribbon based on polyimide and PTFE such as "KAPTON” (registered trademark). However, it must have a sufficient density, that is to say in practice be made of an unexpanded (or solid) material to allow mechanical maintenance of the metal strip.
  • the dielectric skin is not necessary in all cases, and the cable according to the invention may or may not be provided with it.
  • the dielectric envelope can be obtained by tape or extrusion. It can be made of any dielectric material other than expanded PTFE, for example expanded PE, as long as its density does not prevent the cable from reaching the desired radii of curvature and endurance.
  • the dielectric envelope and / or the dielectric skin When the dielectric envelope and / or the dielectric skin are banded, they can undergo a conventional heat treatment which makes it possible to weld together the various turns of the banding and to obtain a homogeneous envelope of good mechanical strength.
  • the outer conductor can consist of a single metallic braid based on ribbons or wires, or a metallic ribbon placed helically around the dielectric envelope.

Landscapes

  • Insulated Conductors (AREA)
  • Communication Cables (AREA)

Claims (16)

  1. Elektrisches Hochfrequenzkabel mit mindestens einem elektrischen Innenleiter in Form einer Litze (2) von Leiterdrähten (20), dadurch gekennzeichnet, daß ein Metallband (3) mit Überdeckung um die Litze (2) gewickelt ist.
  2. Kabel nach Anspruch 1, dadurch gekennzeichnet, daß eine Schicht (4) aus einem dielektrischen Material, die dielektrische Haut genannt wird, um das Metallband (3) zu dessen Halt angeordnet ist.
  3. Kabel nach Anspruch 2, dadurch gekennzeichnet, daß die dielektrische Haut (4) durch Extrusion oder Umwickeln des Metallbands erhalten wird.
  4. Kabel nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die Haut (4) um das Metallband extrudiert ist und aus einem Material besteht, das aus der Gruppe ausgewählt wird, die PTFE, PFA-Harz, FEP, ETFE, PEEK, PE und PP enthält.
  5. Kabel nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die Haut (4) aus einem Band auf der Basis von PTFE oder auf der Basis von Polyimid und PTFE oder auf der Basis von Polyimid und PFA-Harz oder auf der Basis von Polyimid und FEP besteht, das mit Überdeckung um das Metallband gewickelt ist.
  6. Kabel nach Anspruch 5, dadurch gekennzeichnet, daß die Windungen des die dielektrische Haut (4) bildenden Bands miteinander verschweißt sind.
  7. Kabel nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß das Material der dielektrischen Haut (4) massiv ist.
  8. Kabel nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß es in koaxialer Anordnung von innen nach außen um einen Innenleiter (2, 3, 4) herum enthält:
    - eine Hülle (5) aus einem dielektrischen Material,
    - einen Außenleiter (6, 7),
    - einen äußeren Schutzmantel (8) aus einem Isoliermaterial.
  9. Kabel nach Anspruch 8, dadurch gekennzeichnet, daß das dielektrische Material, das die Hülle (5) bildet, expandiert ist und eine Dichte besitzt, die geringer als die Hälfte der Dichte des gleichen nicht-expandierten Materials ist.
  10. Kabel nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß es zwei Innenleiter (12, 13, 14; 12', 13', 14') enthält.
  11. Kabel nach Anspruch 10, dadurch gekennzeichnet, daß die Innenleiter (12, 12') spiralförmig oder gestreckt angeordnet sind.
  12. Kabel nach einem der Ansprüche 10 oder 11, dadurch gekennzeichnet, daß die Leiter (12, 13, 14; 12', 13', 14') je von einer Hülle aus einem dielektrischen Material (15, 15') umgeben sind.
  13. Kabel nach Anspruch 12, dadurch gekennzeichnet, daß das dielektrische Material der Hüllen (15, 15') expandiert ist und eine Dichte besitzt, die weniger als die Hälfte der Dichte des gleichen nicht-expandierten Materials beträgt.
  14. Kabel nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, daß die Einheit der beiden Leiter (12, 13, 14; 12', 13', 14') mit einer dielektrischen Hülle (30) umgeben ist.
  15. Kabel nach Anspruch 14, dadurch gekennzeichnet, daß die dielektrischen Hülle (30) von einer Abschirmung (16, 17) umgeben ist.
  16. Kabel nach einem der Ansprüche 10 bis 15, dadurch gekennzeichnet, daß es durch einen äußeren Schutzmantel (18) aus Isoliermaterial geschützt ist.
EP93400182A 1992-01-28 1993-01-26 Elektrisches Hochfrequenzkabel Expired - Lifetime EP0554160B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9200869 1992-01-28
FR9200869A FR2686727B1 (fr) 1992-01-28 1992-01-28 Conducteur electrique et cable electrique contenant un tel conducteur.

Publications (2)

Publication Number Publication Date
EP0554160A1 EP0554160A1 (de) 1993-08-04
EP0554160B1 true EP0554160B1 (de) 1996-08-14

Family

ID=9426030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93400182A Expired - Lifetime EP0554160B1 (de) 1992-01-28 1993-01-26 Elektrisches Hochfrequenzkabel

Country Status (6)

Country Link
US (1) US5414215A (de)
EP (1) EP0554160B1 (de)
CA (1) CA2088215C (de)
DE (1) DE69303936T2 (de)
ES (1) ES2090896T3 (de)
FR (1) FR2686727B1 (de)

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FR2791475B1 (fr) 1999-03-23 2007-02-23 Sagem Cable rayonnant
FR2793364A1 (fr) * 1999-05-04 2000-11-10 Sagem Systeme de communication a cable rayonnant pour assurer une couverture radio controlee d'un volume determine
WO2002041325A1 (en) * 2000-11-14 2002-05-23 Coltec Industrial Products Inc Abrasion-resistant polytetrafluoroethylene tape
JP3678179B2 (ja) * 2001-07-25 2005-08-03 日立電線株式会社 ２重横巻２心平行極細同軸ケーブル
US7472724B2 (en) * 2003-08-18 2009-01-06 Electrolock, Inc. Method and apparatus for creating, using, and dispensing tubes
US7531749B2 (en) 2007-06-12 2009-05-12 International Business Machines Corporation Cable for high speed data communications
US20090229850A1 (en) * 2008-03-11 2009-09-17 International Business Machines Corporation Cable For High Speed Data Communications
US8884163B2 (en) * 2008-05-14 2014-11-11 Nexans Skin cured PTFE wire and cable
US20100025069A1 (en) * 2008-07-30 2010-02-04 Smith Iii Robert L Cable and a method of assembling same
US7999185B2 (en) * 2009-05-19 2011-08-16 International Business Machines Corporation Transmission cable with spirally wrapped shielding
US8936219B2 (en) 2012-03-30 2015-01-20 The Boeing Company Performance-enhancing winglet system and method
CH707152A8 (de) * 2012-10-26 2014-07-15 Huber+Suhner Ag Mikrowellenkabel sowie Verfahren zum Herstellen und Anwendung eines solchen Mikrowellenkabels.
US11336058B2 (en) * 2013-03-14 2022-05-17 Aptiv Technologies Limited Shielded cable assembly
CN103928186A (zh) * 2013-09-29 2014-07-16 安徽宏源特种电缆集团有限公司 一种航空航天用护套综合电缆
CN103886962A (zh) * 2014-02-25 2014-06-25 安徽宏源特种电缆集团有限公司 一种数据通信电缆
CN104751954A (zh) * 2015-02-27 2015-07-01 安徽恒晶电缆集团有限公司 一种防爆型安全电路多导体铠装电缆
FR3033929B1 (fr) * 2015-03-17 2017-03-31 Labinal Power Systems Cable electrique pour l'alimentation d'equipements electriques
JP7010018B2 (ja) * 2018-01-19 2022-01-26 日立金属株式会社 信号伝送用ケーブル
JP7060002B2 (ja) * 2019-11-20 2022-04-26 日立金属株式会社 多心ケーブル
CN111899943A (zh) * 2020-07-10 2020-11-06 深圳市速联技术有限公司 一种同轴线缆及其生产工艺

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Also Published As

Publication number Publication date
US5414215A (en) 1995-05-09
CA2088215A1 (fr) 1993-07-29
CA2088215C (fr) 1999-09-14
EP0554160A1 (de) 1993-08-04
FR2686727B1 (fr) 1997-01-31
FR2686727A1 (fr) 1993-07-30
DE69303936T2 (de) 1996-12-19
ES2090896T3 (es) 1996-10-16
DE69303936D1 (de) 1996-09-19

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