EP0373120A1 - Koaxialkabel und dessen Herstellungsverfahren - Google Patents

Koaxialkabel und dessen Herstellungsverfahren Download PDF

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Publication number
EP0373120A1
EP0373120A1 EP89830037A EP89830037A EP0373120A1 EP 0373120 A1 EP0373120 A1 EP 0373120A1 EP 89830037 A EP89830037 A EP 89830037A EP 89830037 A EP89830037 A EP 89830037A EP 0373120 A1 EP0373120 A1 EP 0373120A1
Authority
EP
European Patent Office
Prior art keywords
conductor
coaxial cable
insulating
tubular element
inner conductor
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.)
Withdrawn
Application number
EP89830037A
Other languages
English (en)
French (fr)
Inventor
Sergio Mueller
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0373120A1 publication Critical patent/EP0373120A1/de
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the present invention relates to an improved coaxial cable and to the method for making this cable.
  • coaxial cables consisting substantially of a conductor pair,with one of the conductors being arranged inside the other.
  • the task of the present invention is to obviate the above mentioned drawbacks by providing a coaxial cable,and a method for making it,having a comparatively small weight and cost while providing good electrically insulating and signal transmission characteristics.
  • a main object of the invention is to provide such a coaxial cable in which the central conductor is arranged in a very stable and symmetric way.
  • Another object of the invention is to provide such a coaxial cable having electrical characteristics substantially invariable in the time.
  • an improved coaxial cable for transmitting high frequency signals comprises an inner conductor,­thereabout there is extruded a plastics material coating which is provided with two or more legs outwardly projecting therefrom along the overall length thereof,­said legs being adapted to properly center said inner conductor within a plastics material tubular element,­so as to enclose a comparatively high air amount as a dielectric material,on the outside of said insulating tubular element there being arranged a second conductor,­ substantially parallel to said inner conductor,the assembly of said inner conductor,insulating tubular element and second conductor being enclosed in an outer coating or protecting sheath made of PVC or other insulating material.
  • the insulating coating provided with longi­tudinally projecting legs,which encompasses the inner conductor may be twisted so as to assume a helical arrangement.
  • the mentioned longitudinal legs the outer edges of which press against the inner face of the insulating tubular element,can be provided in a number of two,as diametrically opposite arranged,­or three or,preferably,four so as to assure,in coopera­tion with the twisted arrangement,a perfect centering of the inner conductor,even if the cable is possibly bent at one or more regions thereof.
  • a shield can be provided as the second or outer conductor,made of a tinned or silvered red copper braid.
  • a second embodiment provides for the insertion,­between the inner insulating tubular element and the outer sheath,of an aluminium sheet,or a copper sheet,­coupled to a polyester material and having the conductive side facing the sheath and contacting a conductor,or ground wire,either of the unipolar or stranded type,­made of tinned or silvered red copper and extending parallel to the inner conductor.
  • a third embodiment provides to replace the mentioned aluminium or copper sheet with a polyester coupled aluminium or copper strip helically wound about the insulating tubular inner element with the insulated side of said strip facing said tubular ele­ment,the conductive side of said strip facing said sheath and contacting a conductor,or ground wire,­either of the unipolar or stranded type,made of tinned or silvered red copper,which extends parallel to the inner conductor.
  • the insulating element provided with longi­tudinal legs which encloses the inner conductor (made of tinned or silvered red copper ) and the tubular inner element are made of polyethylene or other suitable electrically insulating material,whereas the coating or enclosing sheath is preferably made of PVC.
  • the coaxial cable 1 comprises two conductors,that is a first inner conductor 2 and a second outer conductor 3 which are electrically insulated from one another and enclosed within an outer coating or envelope,or protecting sheath.
  • the inner conductor 2 is embedded,for example by means of an extruding operation,­within an insulating coating 4,of a plastics material,­provided with longitudinal outer legs 4′ and 4 ⁇ adapted to center the conductor 2 within an insulating tubular element 5,also made of a plastics material, severelyby pressing against the inner face thereof.
  • the longitudinal legs may also be three and,preferably,four as evenly arranged about the conductor.
  • the assembly consist­ing of the conductor 2 and its insulating element 4,­having the mentioned longitudinal legs,can be subjected to a suitable helical twisting step,so as to provide a perfect centering of the conductor 2 even if the cable would be subjected to bending.
  • the second or outer conductor 3 can consist of a copper braid shield.
  • the mentioned sheet 7 is replaced by a strip helically wound about the tubular element,the conductive side 7 of said strip facing the sheath 6 and contacting a conductor 3 which is parallel to the inner conductor,2.

Landscapes

  • Communication Cables (AREA)
  • Insulated Conductors (AREA)
EP89830037A 1988-12-09 1989-02-03 Koaxialkabel und dessen Herstellungsverfahren Withdrawn EP0373120A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8822904A IT1227546B (it) 1988-12-09 1988-12-09 Cavo coassiale perfezionato e relativo metodo di fabbricazione
IT2290488 1988-12-09

Publications (1)

Publication Number Publication Date
EP0373120A1 true EP0373120A1 (de) 1990-06-13

Family

ID=11201734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89830037A Withdrawn EP0373120A1 (de) 1988-12-09 1989-02-03 Koaxialkabel und dessen Herstellungsverfahren

Country Status (2)

Country Link
EP (1) EP0373120A1 (de)
IT (1) IT1227546B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264660A (en) * 1991-06-20 1993-11-23 Asea Brown Boveri Ltd. High-voltage system
GB2296367A (en) * 1994-12-22 1996-06-26 Baker Hughes Inc Fluid line with integral electrical conductor
US5920032A (en) * 1994-12-22 1999-07-06 Baker Hughes Incorporated Continuous power/signal conductor and cover for downhole use
US6657126B2 (en) * 2001-04-25 2003-12-02 Yazaki Corporation Wire branch processing for shielded wire
US6815617B1 (en) * 2002-01-15 2004-11-09 Belden Technologies, Inc. Serrated cable core
CN106714443A (zh) * 2015-11-13 2017-05-24 建业科技电子（惠州）有限公司 高精度柔性电路板

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE716111C (de) * 1932-06-29 1942-01-13 Kabelwerk Vacha Ag Abgeschirmte elektrische Hohlraumleitung
US2580838A (en) * 1947-01-02 1952-01-01 Us Rubber Co Coaxial cable with helical insulation
US3927247A (en) * 1968-10-07 1975-12-16 Belden Corp Shielded coaxial cable
GB1468213A (en) * 1974-05-22 1977-03-23 Reliance Ltd Method of and apparatus for making an insulated cable
US4268714A (en) * 1979-05-16 1981-05-19 Sumitomo Electric Industries, Ltd. Shielded wire
GB2067824A (en) * 1979-12-28 1981-07-30 Junkosha Co Ltd A Flexible Coaxial Cable
GB2160147A (en) * 1984-06-15 1985-12-18 Delta Enfield Ltd Manufacture of electric cables

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE716111C (de) * 1932-06-29 1942-01-13 Kabelwerk Vacha Ag Abgeschirmte elektrische Hohlraumleitung
US2580838A (en) * 1947-01-02 1952-01-01 Us Rubber Co Coaxial cable with helical insulation
US3927247A (en) * 1968-10-07 1975-12-16 Belden Corp Shielded coaxial cable
GB1468213A (en) * 1974-05-22 1977-03-23 Reliance Ltd Method of and apparatus for making an insulated cable
US4268714A (en) * 1979-05-16 1981-05-19 Sumitomo Electric Industries, Ltd. Shielded wire
GB2067824A (en) * 1979-12-28 1981-07-30 Junkosha Co Ltd A Flexible Coaxial Cable
GB2160147A (en) * 1984-06-15 1985-12-18 Delta Enfield Ltd Manufacture of electric cables

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264660A (en) * 1991-06-20 1993-11-23 Asea Brown Boveri Ltd. High-voltage system
GB2296367A (en) * 1994-12-22 1996-06-26 Baker Hughes Inc Fluid line with integral electrical conductor
US5920032A (en) * 1994-12-22 1999-07-06 Baker Hughes Incorporated Continuous power/signal conductor and cover for downhole use
US6103031A (en) * 1994-12-22 2000-08-15 Baker Hughes Incorporated Continous power/signal conductor and cover for downhole use
US6657126B2 (en) * 2001-04-25 2003-12-02 Yazaki Corporation Wire branch processing for shielded wire
DE10218398B4 (de) * 2001-04-25 2006-08-17 Yazaki Corp. Verfahren zur Herstellung einer Abzweigverbindung an einem abgeschirmten Leiter
US6815617B1 (en) * 2002-01-15 2004-11-09 Belden Technologies, Inc. Serrated cable core
CN106714443A (zh) * 2015-11-13 2017-05-24 建业科技电子（惠州）有限公司 高精度柔性电路板
CN106714443B (zh) * 2015-11-13 2024-02-06 建业科技电子（惠州）有限公司 高精度柔性电路板

Also Published As

Publication number Publication date
IT1227546B (it) 1991-04-15
IT8822904A0 (it) 1988-12-09

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19930311