EP1047084A2 - Câble coaxial à haute fréquence - Google Patents

Câble coaxial à haute fréquence Download PDF

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Publication number
EP1047084A2
EP1047084A2 EP00106427A EP00106427A EP1047084A2 EP 1047084 A2 EP1047084 A2 EP 1047084A2 EP 00106427 A EP00106427 A EP 00106427A EP 00106427 A EP00106427 A EP 00106427A EP 1047084 A2 EP1047084 A2 EP 1047084A2
Authority
EP
European Patent Office
Prior art keywords
layer
cable according
following
surrounding
insulation
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
EP00106427A
Other languages
German (de)
English (en)
Other versions
EP1047084B1 (fr
EP1047084A3 (fr
Inventor
Wolfgang Dlugas
Henning Hansen
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.)
HEW Kabel CDT GmbH and Co KG
Original Assignee
Eilentropp 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 Eilentropp KG filed Critical Eilentropp KG
Publication of EP1047084A2 publication Critical patent/EP1047084A2/fr
Publication of EP1047084A3 publication Critical patent/EP1047084A3/fr
Application granted granted Critical
Publication of EP1047084B1 publication Critical patent/EP1047084B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01B11/1839—Construction of the insulation between the conductors of cellular structure

Definitions

  • the present invention relates to a coaxial radio frequency cable with a central conductor surrounding multilayer insulation made of polymeric materials and with an electrical shield enclosing the insulation, which is covered by a outer covering is covered.
  • Cables of the generic type are well known, they can be found in the High-frequency technology for the transmission of analog and digital signals in general Application.
  • a known coaxial high-frequency cable (US 5,817,981)
  • the insulation surrounding the central conductor consists of two layers, which are: differ in the dielectric constant. So the dielectric constant is the second layer larger than that of the first layer, wherein the first layer by a Polyethylene and the second layer is formed by a polyimide.
  • the object of the invention is therefore based on finding a way, despite the required minor exterior Dimensions further increase the transmission properties of such micro-coaxial cables improve, especially the capacity of the transmission path to a minimum to reduce.
  • the individual Layers in the insulation consist of fluoropolymers, with at least one of the central conductor enclosing the first layer from a melt processable fluoropolymer and an outer second layer made of one of the Melt non-processable fluoropolymer, the second layer being porous and with the surrounding shield is non-positively connected by use of two or more fluoropolymer insulation layers for the dielectric of the cable according to the invention it is possible to change the dielectric constant of the insulation adapt to the respective requirements, especially low constants set without resorting to foamed insulation as a whole.
  • the outer dimensions of the cable are extremely small.
  • extrudable fluoropolymers are e.g. the Tetrafluoroethylene (hexafluoropropylene copolymer (FEP), the tetrafluoroethylene ⁇ Perfluoroalkylvenyl ether copolymer (TFA / PFA) or one under the trade name HYFLON MFA distributed fluoropolymer.
  • FEP hexafluoropropylene copolymer
  • TFA / PFA Perfluoroalkylvenyl ether copolymer
  • HYFLON MFA distributed fluoropolymer e.g. the Tetrafluoroethylene (hexafluoropropylene copolymer (FEP), the tetrafluoroethylene ⁇ Perfluoroalkylvenyl ether copolymer (TFA / PFA) or one under the trade name HYFLON MFA distributed fluoropolymer.
  • This first layer can be compact trained but also foamed.
  • the second insulating layer adjoining the first is porous, also known as a microporous structure (EP 0489 752 B1).
  • the wall thickness of this layer is approximately between 0.8 and 0.2, preferably between 0.4 and 0.3 mm. It is advantageous if the dielectric constant of the first layer is greater than that of the second layer.
  • tapes made of polytetrafluoroethylene are preferably used, such a tape is stretched and sintered in order to ensure the porous character of the tape. It depends on the microporosity of the strip material. To ensure this, the tape, made from a so-called.
  • a stretching process with a stretching rate of up to 2000%, preferably between 300 and 1000%. The stretching usually takes place in the direction of the belt, but it can also be carried out transversely to it, for example if the porosity of the belt or film is to be increased.
  • the mechanical strength of the strip or film material is increased by a sintering process which takes place simultaneously with the stretching process or also after the stretching process.
  • the thickness of the stretched and advantageously also sintered band or corresponding film is then 15 to 250 microns, preferably 30 to 100 ⁇ m.
  • At least the outermost band layer with the surface of the electrical shield is non-positively connected.
  • an applied to the tape winding such as sprayed on, hot melt adhesive for the frictional connection between a conductive plastic or metal foil, or in a continuation of the invention in that an adhesive-coated metal foil is used as the electrical shield.
  • the frictional connection between the porous outermost layer of the Insulation and the conductive shielding are usually done during extrusion the outer jacket of the cable due to its heat content. This is especially true when, as also provided according to the invention, the outer jacket from a Fluoropolymer with a correspondingly high melting / extrusion temperature of e.g. B. 350 ° C exists. Such temperatures in the outer area of the cable lead to Melt the adhesive layer between porous insulation and electrical Shielding, the adhesive then penetrates the pores e.g. B. at least the top one Location of a wrapping made of stretched film, which is the second layer of the Cable insulation is used.
  • Coaxial cable is the mechanically strong all-over connection between z. B. one Metal foil and the outermost porous insulating layer of the cable.
  • the shielding of the cable is advantageously formed in two layers.
  • Above the described adhesive-coated metal foil or a metallized Plastic film is an outer layer in the form of a metal wire layer or one Braid provided from individual metal wires.
  • the Outer jacket based on fluoropolymers or halogen-free, flame-retardant or flame-retardant, anti-corrosive polymer materials, e.g. Polyolefins, elastomers or thermoplastic rubber.
  • the two-layer shielding has the advantage an improved shielding effect combined with high flexibility of the cable.
  • a solid copper wire is provided as the central conductor 1, advantageously tin-plated or silver-plated. Instead of a solid copper wire you can of course also use a strand made of bare or tinned copper wires. in the The present exemplary embodiment is the diameter of the central conductor about 0.254 mm.
  • the central conductor 1 is enclosed by the inner or first Layer 2, here from a melt processable i.e. extruded Fluoropolymer, e.g. from a tetrafluoroethylene / hexafluoropropylene copolymer (FEP).
  • This first insulating layer has, for example, a wall thickness of 0.225 mm, it is of compact design in the exemplary embodiment.
  • the broad structure of the cable shows the second and thus outer insulating layer 3 consists of a winding with a thickness of e.g. 0.3 mm from several layers one made by paste extrusion and then rolling Polytetrafluoroethylene tape that is stretched after being rolled out and one Has been subjected to heat treatment for the purpose of sintering.
  • the stretching process created pores in the tape serve as in the winding Air chambers to reduce dielectric constants and improve the electrical transmission properties that are in the outermost position of the Tape pore open pores are used to anchor the entire surface aluminum foil coated with polyester or another adhesive 4.
  • this is a layer / Braid made of tinned copper wires.
  • the coaxial cable is approximately 2.00 mm, i.e. on Coaxial cable with extremely small external dimensions.
  • the cable is highly flexible with high mechanical strength and durability of the transmission properties even with changing temperature loads.
  • the cable according to the invention is characterized in particular by a low tolerance of the Wave resistance and a low operating capacity. For example, on 75 ohm cable according to the invention has an operating capacity of ⁇ 60 nF / km.
  • the Attenuation is e.g. at 1 MHz at 2.3 dB / 100m, at 100 MHz at 27.7 dB / 100m and at 500 MHz at 67.9 dB / 100m.

Landscapes

  • Communication Cables (AREA)
  • Insulated Conductors (AREA)
  • Laminated Bodies (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
EP00106427A 1999-04-23 2000-03-24 Câble coaxial à haute fréquence Expired - Lifetime EP1047084B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19918539A DE19918539A1 (de) 1999-04-23 1999-04-23 Koaxiales Hochfrequenzkabel
DE19918539 1999-04-23

Publications (3)

Publication Number Publication Date
EP1047084A2 true EP1047084A2 (fr) 2000-10-25
EP1047084A3 EP1047084A3 (fr) 2001-05-16
EP1047084B1 EP1047084B1 (fr) 2007-10-10

Family

ID=7905671

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00106427A Expired - Lifetime EP1047084B1 (fr) 1999-04-23 2000-03-24 Câble coaxial à haute fréquence

Country Status (5)

Country Link
US (1) US6337443B1 (fr)
EP (1) EP1047084B1 (fr)
AT (1) ATE375595T1 (fr)
CA (1) CA2306340C (fr)
DE (2) DE19918539A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH704600A1 (de) * 2011-03-14 2012-09-14 Huber+Suhner Ag Koaxialkabel.
CN105931747A (zh) * 2016-06-17 2016-09-07 江阴凯博通信科技有限公司 一种双层屏蔽环保同轴防伪电缆

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI264020B (en) * 2002-02-08 2006-10-11 Hirakawa Hewtech Corp Foamed coaxial cable with high precision and method of fabricating same
JP4055125B2 (ja) * 2002-12-24 2008-03-05 日本光電工業株式会社 同軸ケーブルおよびそれを用いた伝送トランス
US7355123B2 (en) * 2003-05-22 2008-04-08 Hirakawa Hewtech Corporation Foam coaxial cable and method of manufacturing the same
DE10325517A1 (de) * 2003-06-05 2004-12-23 Hew-Kabel/Cdt Gmbh & Co. Kg Elektrische Heizleitung oder Heizband
JP2005339818A (ja) * 2004-05-24 2005-12-08 Hirakawa Hewtech Corp 高精度発泡同軸ケーブル
US20060011376A1 (en) * 2004-07-16 2006-01-19 General Electric Company Multi-axial electrically conductive cable with multi-layered core and method of manufacture and use
EP2156860A1 (fr) * 2008-08-20 2010-02-24 Centre National De La Recherche Scientifique-CNRS Procédé de fabrication d'électrodes isolées pour l'application de champs électriques dans un matériau conducteur
EP2372721A4 (fr) * 2008-12-02 2014-01-01 Fujikura Ltd Câble de transmission et câble de transmission de signal l utilisant
US8308505B2 (en) 2009-12-09 2012-11-13 Scott Hatton Guarded coaxial cable assembly
EP2615240A3 (fr) * 2012-01-16 2014-09-03 Prad Research Development Limited Moteur enrobé de tubage conducteur
US9455069B2 (en) * 2012-07-24 2016-09-27 Schlumberger Technology Corporation Power cable system
FR3002076B1 (fr) * 2013-02-12 2022-11-11 Nexans Cable electrique resistant aux decharges partielles
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
US9672958B2 (en) * 2015-05-19 2017-06-06 Te Connectivity Corporation Electrical cable with shielded conductors
US11545280B2 (en) 2018-08-23 2023-01-03 The Esab Group Inc. Cable hose with embedded features
US10964451B2 (en) 2018-11-06 2021-03-30 The Esab Group Inc. Cable hose with conductive electromagnetic interference shield
CN111863406B (zh) * 2020-08-14 2022-05-24 阳光电源股份有限公司 一种线圈绕组、变压器和串并型电力电子装置
CN114068105B (zh) * 2021-11-17 2023-10-27 佑创射频技术(江苏)有限公司 一种稳相稳幅电缆的生产工艺

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GB1146319A (en) * 1966-12-19 1969-03-26 United Carr Inc Co-axial cable
FR2219498B1 (fr) * 1973-02-23 1977-07-22 Cables De Lyon Geoffroy Delore
DE2541243A1 (de) * 1975-09-12 1977-03-24 Aeg Telefunken Kabelwerke Hochfrequenz-koaxialleitung
US4368350A (en) * 1980-02-29 1983-01-11 Andrew Corporation Corrugated coaxial cable
US4477693A (en) * 1982-12-09 1984-10-16 Cooper Industries, Inc. Multiply shielded coaxial cable with very low transfer impedance
DE3515574A1 (de) * 1984-05-03 1985-11-07 Osakeyhtiö Nokia AB, Helsinki Koaxialkabel und verfahren zur herstellung einer den innenleiter dieses kabels umgebenen isolierung
US5059263A (en) * 1988-08-12 1991-10-22 W. L. Gore & Associates, Inc. Large gauge insulated conductor and coaxial cable, and process for their manufacture
US4978813A (en) * 1989-08-29 1990-12-18 W. L. Gore & Associates, Inc. Electrical cable
US5210377A (en) * 1992-01-29 1993-05-11 W. L. Gore & Associates, Inc. Coaxial electric signal cable having a composite porous insulation
US5293001A (en) * 1992-04-14 1994-03-08 Belden Wire & Cable Company Flexible shielded cable
US5358516A (en) * 1992-12-11 1994-10-25 W. L. Gore & Associates, Inc. Implantable electrophysiology lead and method of making
US5468314A (en) * 1993-02-26 1995-11-21 W. L. Gore & Associates, Inc. Process for making an electrical cable with expandable insulation
JPH07153330A (ja) * 1993-11-29 1995-06-16 Junkosha Co Ltd 同軸ケーブル用コア、これを用いた同軸ケーブル、およびその製造方法
JP2976816B2 (ja) * 1994-07-21 1999-11-10 住友電気工業株式会社 セミリジッド同軸ケーブル
US5817981A (en) * 1995-09-05 1998-10-06 Lucent Technologies Inc. Coaxial cable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH704600A1 (de) * 2011-03-14 2012-09-14 Huber+Suhner Ag Koaxialkabel.
WO2012123266A1 (fr) * 2011-03-14 2012-09-20 Huber+Suhner Ag Câble coaxial
CN105931747A (zh) * 2016-06-17 2016-09-07 江阴凯博通信科技有限公司 一种双层屏蔽环保同轴防伪电缆

Also Published As

Publication number Publication date
CA2306340C (fr) 2005-11-15
EP1047084B1 (fr) 2007-10-10
DE19918539A1 (de) 2000-10-26
EP1047084A3 (fr) 2001-05-16
CA2306340A1 (fr) 2000-10-23
DE50014701D1 (de) 2007-11-22
ATE375595T1 (de) 2007-10-15
US6337443B1 (en) 2002-01-08

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