EP0503129A1 - Câble électrique coaxial à haute fréquence - Google Patents

Câble électrique coaxial à haute fréquence Download PDF

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Publication number
EP0503129A1
EP0503129A1 EP91113722A EP91113722A EP0503129A1 EP 0503129 A1 EP0503129 A1 EP 0503129A1 EP 91113722 A EP91113722 A EP 91113722A EP 91113722 A EP91113722 A EP 91113722A EP 0503129 A1 EP0503129 A1 EP 0503129A1
Authority
EP
European Patent Office
Prior art keywords
frequency cable
cable according
profile
inner conductor
helix
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.)
Ceased
Application number
EP91113722A
Other languages
German (de)
English (en)
Inventor
Peter Madry
Helmut Hildebrand
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.)
Kabelmetal Electro GmbH
Alcatel Lucent NV
Original Assignee
Kabelmetal Electro GmbH
Alcatel NV
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
Priority claimed from DE19914107651 external-priority patent/DE4107651A1/de
Priority claimed from DE19914109491 external-priority patent/DE4109491A1/de
Application filed by Kabelmetal Electro GmbH, Alcatel NV filed Critical Kabelmetal Electro GmbH
Publication of EP0503129A1 publication Critical patent/EP0503129A1/fr
Ceased legal-status Critical Current

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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
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1834—Construction of the insulation between the conductors
    • H01B11/1856—Discontinuous insulation
    • 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
    • H01B11/1847—Construction of the insulation between the conductors of helical wrapped structure

Definitions

  • the present invention relates to a coaxial electrical high-frequency cable with a spacer arranged between the inner and outer conductors.
  • a coaxial high-frequency power cable is already known, in which a spacer made of individual pieces is provided between the inner conductor and outer conductor, which are made of ceramic. These individual pieces are arranged offset on the inner conductor in the axial direction and individually screwed to it (DE-OS 33 04 957).
  • these known cables are also suitable for being largely ready for operation under the influence of fire, this construction is very expensive to manufacture, apart from the fact that the fastening screws used for fastening the individual pieces to the inner conductor are often undesirable for electrical reasons.
  • the invention has for its object to provide a coaxial high-frequency cable that is operable even under the influence of fire, its production is inexpensive and free of additional materials in the dielectric, in particular metals, which adversely affect the transmission quality.
  • a profile helix is used as a spacer, which consists of glass or ceramic materials or predominantly contains them.
  • a helix is with the Conventional machine systems available today in cable technology can be applied without problems, an electrical influence on the transmission properties by foreign materials is excluded, the cable according to the invention is also operable under the influence of fire.
  • This is particularly important e.g. B. when supplying an emergency transmitter or a so-called radiating high-frequency cable used for control or reporting purposes, which is used for train monitoring and is arranged in a tunnel, but also for those supply or control cables that are on oil platforms or those for offshore Purposes installed and specially protected against the effects of fire.
  • the profile spiral made of the refractory materials according to the invention can be designed in any way, so it can be a profile strand which is helically wrapped around the inner conductor of the high-frequency cable.
  • the profile strand will be made from braided single strands of round cross-section or from individual threads.
  • profiles can in turn be stranded or interwoven with one another, for example when it comes to bridging larger distances between the inner and outer conductors of the cable, without adversely affecting the flexibility.
  • the Profile helix from the refractory materials receives an additional refractory coating, for example in the form of a braid or fabric, this applies in particular if the helix itself consists of individual strands stranded or knitted together.
  • the profile helix consists of a plurality of profile bodies made of glass or ceramic materials arranged one behind the other on a support.
  • the profile body itself can be, for example, balls, rollers or rollers, which are fastened on a corresponding refractory carrier thread or strand or are braided with refractory threads.
  • known ceramics can also be used as the material for the spacers according to the invention. These can optionally be mechanically reinforced by embedded glass fibers.
  • profile bodies can be, for example, hollow cylinders with longitudinal slots leading from the ends to the center and offset by more than 90 ° with respect to one another.
  • a preferred construction is that the longitudinal slots are offset from one another by 180 °.
  • Another embodiment of the shaped pieces are radially slotted disks which are placed transversely on the inner conductor, it being possible for the stability of these spacers on the inner conductor to turn adjacent disks evenly against one another.
  • the molded bodies thus reliably hold the inner conductor in its central position and are finally fixed in their position on the inner conductor by the outer conductor.
  • a further expedient embodiment of the invention is obtained when the shaped pieces are injection molded pieces completely surrounding the inner conductor.
  • an injection molding machine filled with the appropriate ceramic mass can be used in the implementation of the invention for the manufacture of the ceramic injection molded pieces
  • the shape of the disc is sprayed onto the continuous inner conductor and each disc is then sintered or fired or, if necessary, reworked.
  • the usual further processing of the inner conductor prepared in this way and provided with the spacers can then be carried out in a known manner.
  • Known ceramics can be used as material for the spacers according to the invention, which may also be interspersed with glass fibers, that is to say additionally reinforced.
  • foam ceramics such as those used for. B. are known under the trade name POROTON. Since these materials are hygroscopic, it is advisable to provide the moldings with a moisture-repellent coating after sintering, which can be a varnish or a glaze.
  • the refractory cables according to the invention find a particularly advantageous use in the form of so-called radiating high-frequency cables, which are coaxial electrical cables whose outer conductors have regular openings in the form of slots, holes, cutouts and the like. If metal foils are used as outer conductors, which are placed around the refractory spacers in a longitudinal direction, then these are generally not self-supporting, especially if the strip edges leave a longitudinal slot between them. In such or similar cases, it has therefore proven expedient to completely or partially fill the spaces between the inner and outer conductors that are free of the spacers with an insulating material.
  • the insulating material is then advantageously through a refractory film or a tape, for. B. covered a glass mica tape.
  • cables with a self-supporting outer conductor where there is no need for support elements in the form of insulating materials, for example as a support hose, it can often be advantageous to use a spacer, a profile coil or molded body with a closed layer made of a fire-resistant film or a corresponding one Band around. This measure is particularly important if the self-supporting
  • the outer conductor is subsequently provided with slots or bores and there is a risk that metal splinters, chips and the like can get into the dielectric.
  • Fig. 1, 1 designates the inner conductor of a coaxial high-frequency cable, around which is placed a helix 2, which consists of a glass cord made of simple glass yarn, which is twisted, twisted or intertwined, in order to provide a certain distance between the inner conductor and outer conductor necessary cross-sectional dimensions to come.
  • this glass cord is surrounded by an outer braid 3, for example to increase the mechanical strength of such a helix.
  • cords shown in FIG. 1 can also be brought together to form a strand of larger cross-section, as shown in FIG. 2.
  • FIG. 2 For this purpose, for example, according to FIG. 2, three individual cords 2 are stranded or knitted together to form the strand 4, which in turn is then applied as a spacer for the concentric outer conductor on the inner conductor 5 of the high-frequency cable.
  • FIG. 4 shows a spacer helix, which consists of spherical glass or ceramic bodies 9, which in turn are surrounded by a braid 10 made of glass or ceramic threads.
  • the spaces between the inner conductor and the outer conductor (not shown) of the high-frequency cable, which are free of the spacers, can be filled with conventional materials, in particular if the outer conductor is not self-supporting, that is to say, for example, consists of a metal strip around the spacers, for example with materials based on foamed polyethylene or other extrudable materials.
  • coaxial high-frequency cables are used, for. B. also used in the supply of an emergency transmitter or as a so-called radiating high-frequency cable used for control or reporting purposes, which is used for train monitoring and is arranged in tunnels.
  • Such cables must still be operational even if high ambient temperatures occur near the cable after a fire has broken out.
  • the spacers provided according to the invention issue Ceramic materials ensure that the distance between the inner and outer conductors necessary for cable operation is maintained even in the event of a fire.
  • FIG. 5 shows a shaped piece 11 serving as a spacer, which is attached to the inner conductor 12 of the high-frequency cable by being plugged on.
  • the hollow cylindrical shaped piece 11 has two longitudinal slots 13 and 14 which run from the ends towards the center and which allow the inner conductor 12 to be passed through and end in a central region 15 which allows free passage from top to bottom in the selected representation allows.
  • inner conductors already provided with the spacers can then, as usual, be enclosed by the outer conductor, which is applied, for example in the form of a longitudinally extending copper strip or a corrugated tube, to the shaped pieces 11 concentrically with the inner conductor 12.
  • FIG. 6 shows an embodiment of the invention in which disk-shaped spacers 17 are attached to the inner conductor 16 of the refractory coaxial high-frequency cable.
  • These disk-shaped spacers have a gap or an opening 18 which are adapted to the dimensions of the inner conductor 16.
  • the ends 19 and 20 of the spacer formed by the opening or the gap are arranged offset in the direction of the inner conductor 16. This results in a the spacer is held securely on the inner conductor of the high-frequency cable.
  • FIG. 7 shows another possibility for carrying out the inventive concept.
  • disc-shaped fittings 22 are applied to the inner conductor 21 of the refractory high-frequency cable at intervals, which completely enclose the inner conductor 21 and are applied by an injection or injection molding process.
  • known techniques can be used, which consist, for example, in that a plurality of these disk-shaped spacers are simultaneously sprayed onto a continuous conductor, then sintered or hardened and optionally aftertreated, while at the same time, in a discontinuous working step, an equal number of new shaped pieces are applied to the inner conductor 21 are sprayed on.
  • the inner conductor 23 is surrounded by the helix 24 made of refractory material. B. with a cell polyethylene 25 filled out. This insulating material also serves as a carrier for the outer conductor 26, the z. B. is designed as a slotted metal foil. In the event of a fire, e.g. B. and the prevailing high temperatures to prevent leakage of melting polyethylene from the outer conductor 26 is between insulating polyethylene 25 and outer conductor 26, a layer 27 of one or more layers of a refractory tape, such as a mica coated glass fabric tape.
  • a refractory tape such as a mica coated glass fabric tape.
  • FIG. 9 describes a cable structure in which the inner conductor 28 is in turn surrounded by a helix 29 made of refractory material, and the extruded plastic hose 31, for example made of a suitable polyethylene.
  • a refractory layer 32 is provided between the plastic hose 31 and the outer conductor 30. This consists, for. B. from a closed layer of mica or glass fabric tapes.
  • FIG. 10 shows a cable according to the invention with properties radiating high-frequency signals and self-supporting outer conductor.
  • the outer conductor 35 On the helix 34 surrounding the inner conductor 33 made of refractory material, the outer conductor 35 is supported, for. B. in the form of a closed and corrugated metal jacket. Since this metal jacket has radiation openings 36 which are subsequently, for. B. are produced by milling the crests on a surface line, according to the invention an additional layer 37 between the helix 34 and the outer conductor 35 Mica or coated glass fabric tapes are provided which, in closed form, prevent metal residues, which result from the production of the radiation openings 36, from penetrating into the space 38 between the inner conductor 33 and the outer conductor 35.
  • the spacing molded articles according to FIGS. 5 to 7 can of course also be used instead of the refractory coils. It is essential for the invention that at elevated ambient temperatures, for. B. in the event of fire, the transmission of high-frequency signals is possible.

Landscapes

  • Waveguides (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
EP91113722A 1991-03-09 1991-08-16 Câble électrique coaxial à haute fréquence Ceased EP0503129A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19914107651 DE4107651A1 (de) 1991-03-09 1991-03-09 Koaxiales hochfrequenzkabel mit keramischen abstandshaltern
DE4107651 1991-03-09
DE4109491 1991-03-22
DE19914109491 DE4109491A1 (de) 1991-03-22 1991-03-22 Koaxiales hochfrequenzkabel mit keramischer abstandshalterwendel

Publications (1)

Publication Number Publication Date
EP0503129A1 true EP0503129A1 (fr) 1992-09-16

Family

ID=25901721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91113722A Ceased EP0503129A1 (fr) 1991-03-09 1991-08-16 Câble électrique coaxial à haute fréquence

Country Status (5)

Country Link
US (1) US5262593A (fr)
EP (1) EP0503129A1 (fr)
JP (1) JPH0620534A (fr)
CA (1) CA2062421A1 (fr)
FI (1) FI920994A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19737759A1 (de) * 1997-08-29 1999-03-04 Alsthom Cge Alcatel Koaxiales Hochfrequenz-Kabel

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US5837940A (en) * 1995-05-15 1998-11-17 Moncrieff; J. Peter Conductive surface and method with nonuniform dielectric
US5742002A (en) * 1995-07-20 1998-04-21 Andrew Corporation Air-dielectric coaxial cable with hollow spacer element
US6090118A (en) 1998-07-23 2000-07-18 Mcguckin, Jr.; James F. Rotational thrombectomy apparatus and method with standing wave
US6812401B2 (en) * 1998-10-05 2004-11-02 Temp-Flex Cable, Inc. Ultra-small high-speed coaxial cable with dual filament insulator
US8414543B2 (en) 1999-10-22 2013-04-09 Rex Medical, L.P. Rotational thrombectomy wire with blocking device
AU2614901A (en) 1999-10-22 2001-04-30 Boston Scientific Corporation Double balloon thrombectomy catheter
US6815617B1 (en) * 2002-01-15 2004-11-09 Belden Technologies, Inc. Serrated cable core
US6849799B2 (en) * 2002-10-22 2005-02-01 3M Innovative Properties Company High propagation speed coaxial and twinaxial cable
TW572337U (en) * 2003-05-01 2004-01-11 Yi-Huan Yan Anti-magnetic conductive wire structure for preventing EMI
US20050183878A1 (en) * 2004-02-23 2005-08-25 Herbort Tom A. Plenum cable
US7071417B2 (en) * 2004-10-25 2006-07-04 Demodulation, Inc. Optically encoded glass-coated microwire
US20060254803A1 (en) * 2005-05-26 2006-11-16 Dorffler Albertina H Ornamental computer network cables
EP1811596B1 (fr) * 2006-01-20 2011-09-07 Alcatel Lucent Guide d'onde de radiofréquence avec conducteur électrique de film plastique revêtu d'une couche conductrice
US7525041B2 (en) * 2006-09-21 2009-04-28 General Electric Company Method and apparatus for resonance frequency response attenuation
US7642451B2 (en) * 2008-01-23 2010-01-05 Vivant Medical, Inc. Thermally tuned coaxial cable for microwave antennas
US7849928B2 (en) * 2008-06-13 2010-12-14 Baker Hughes Incorporated System and method for supporting power cable in downhole tubing
US7674981B1 (en) * 2008-09-25 2010-03-09 Alcatel-Lucent Usa Inc. Structured dielectric for coaxial cable
US7905295B2 (en) * 2008-09-26 2011-03-15 Baker Hughes Incorporated Electrocoil tubing cable anchor method
WO2012138729A1 (fr) 2011-04-07 2012-10-11 3M Innovative Properties Company Câble de transmission grande vitesse
WO2012138717A1 (fr) 2011-04-07 2012-10-11 3M Innovative Properties Company Câble de transmission grande vitesse
US8941532B2 (en) * 2012-12-06 2015-01-27 Rosemount Tank Radar Ab Probe spacing element
JP2015002100A (ja) * 2013-06-17 2015-01-05 日立金属株式会社 同軸ケーブル
US9748022B2 (en) * 2013-12-24 2017-08-29 Belden Inc. Semi-solid balanced audio cable
US9455070B2 (en) * 2013-12-24 2016-09-27 Belden Inc. Semi-solid unbalanced audio cable
JP6372325B2 (ja) * 2014-11-27 2018-08-15 日立金属株式会社 同軸ケーブル及びそれを用いた医療用ケーブル
CN107924735B (zh) * 2015-10-06 2020-04-14 康普技术有限责任公司 具有包括密封段的介电层的同轴电缆及其制造方法
US9922751B2 (en) * 2016-04-01 2018-03-20 Intel Corporation Helically insulated twinax cable systems and methods
US10760392B2 (en) 2016-04-13 2020-09-01 Acceleware Ltd. Apparatus and methods for electromagnetic heating of hydrocarbon formations
CA3074522A1 (fr) * 2017-09-08 2019-03-14 Nokia Shanghai Bell Co., Ltd. Cable radiofrequence resistant au feu
CA3083827A1 (fr) 2017-12-21 2019-06-27 Acceleware Ltd. Appareil et procedes pour ameliorer une ligne coaxiale
US20200075196A1 (en) * 2018-06-06 2020-03-05 Trilogy Communications, Inc. Electrical cable and methods of making the same
US11296434B2 (en) 2018-07-09 2022-04-05 Acceleware Ltd. Apparatus and methods for connecting sections of a coaxial line
US11473431B2 (en) * 2019-03-12 2022-10-18 Raytheon Technologies Corporation Energy dissipating damper
US20210020327A1 (en) * 2019-07-18 2021-01-21 Nokia Shanghai Bell Co., Ltd. Dielectric structure, a method of manufacturing thereof and a fire rated radio frequency cable having the dielectric structure
US10726974B1 (en) 2019-12-13 2020-07-28 American Fire Wire, Inc. Fire resistant coaxial cable for distributed antenna systems
US11942233B2 (en) * 2020-02-10 2024-03-26 American Fire Wire, Inc. Fire resistant corrugated coaxial cable
CN115485931A (zh) * 2020-04-21 2022-12-16 东京特殊电线株式会社 同轴扁平电缆
FR3116646B1 (fr) * 2020-11-26 2023-06-30 Thales Sa Câble de puissance à filtre intégré
EP4147903A1 (fr) * 2021-09-14 2023-03-15 ABB E-mobility B.V. Câble de charge pour charger un véhicule électrique et équipement d'alimentation de véhicule électrique doté d'un câble de charge

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Publication number Priority date Publication date Assignee Title
US2348752A (en) * 1940-09-17 1944-05-16 Int Standard Electric Corp Electric cable
FR1189571A (fr) * 1958-01-07 1959-10-05 Felten & Guilleaume Carlswerk Câbles coaxiaux à isolement par espace d'air, pour hautes fréquences et hautes températures
US4280225A (en) * 1977-08-24 1981-07-21 Bicc Limited Communication systems for transportation undertakings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19737759A1 (de) * 1997-08-29 1999-03-04 Alsthom Cge Alcatel Koaxiales Hochfrequenz-Kabel
US6346671B1 (en) 1997-08-29 2002-02-12 Alcatel Coaxial high-frequency cable

Also Published As

Publication number Publication date
FI920994A (fi) 1992-09-10
FI920994A0 (fi) 1992-03-06
CA2062421A1 (fr) 1992-09-10
US5262593A (en) 1993-11-16
JPH0620534A (ja) 1994-01-28

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