EP0688061A1 - Abstahlendes Hochfrequenz-Koaxialkabel - Google Patents

Abstahlendes Hochfrequenz-Koaxialkabel Download PDF

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Publication number
EP0688061A1
EP0688061A1 EP95401332A EP95401332A EP0688061A1 EP 0688061 A1 EP0688061 A1 EP 0688061A1 EP 95401332 A EP95401332 A EP 95401332A EP 95401332 A EP95401332 A EP 95401332A EP 0688061 A1 EP0688061 A1 EP 0688061A1
Authority
EP
European Patent Office
Prior art keywords
sheath
external
internal
cable according
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.)
Ceased
Application number
EP95401332A
Other languages
English (en)
French (fr)
Inventor
Dominique Fougeron
Pierre Milhas
Alain Vermeersch
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 EP0688061A1 publication Critical patent/EP0688061A1/de
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/203—Leaky coaxial lines

Definitions

  • the present invention relates to a high frequency radiating coaxial cable, comprising an internal conductor, an internal dielectric sheath surrounding the internal conductor, an external conductor itself comprising a plurality of external conductive elements spaced from one another and arranged in a layer. coaxial around the internal sheath, and an insulating external sheath.
  • a radiating cable of this type is described in document GB-A-2 094 065.
  • the external conductive elements are retained spaced from each other by the external sheath. To this end, it is provided with recesses for receiving and positioning the external conductive elements.
  • the internal sheath has recesses for at least partially receiving these external conductive elements, which are then retained in position by the external sheath.
  • each cable it is necessary for each cable to provide recesses in the outer sheath and / or the inner sheath and to place therein the various external conductive elements. From one cable to another, the number and the section of the recesses must be adapted to the number and the section of the external conductive elements adopted.
  • the present invention aims to avoid these problems, by facilitating the production of this type of radiating cable and improving its transmission characteristics, in particular the power radiated along the cable.
  • a high frequency radiating coaxial cable comprising an internal conductor, an internal dielectric sheath surrounding the internal conductor, an external conductor itself comprising a plurality of external conductive elements spaced from each other and arranged in a coaxial layer around the internal sheath, and an external insulating sheath, characterized in that it further comprises a plurality of insulating elements alternating and contiguous with said external conductive elements, by separating them from each other in said layer made continuous on the periphery of said internal sheath and thus covered by said external sheath.
  • This single figure shows in cross section a high frequency radiating coaxial cable according to the present invention.
  • the outer conductor wires spaced from each other by the insulating wires, define the outer conductor of the cable and allow the radiation to the exterior of the high frequency signals transmitted by the inner conductor.
  • the rod 2, the internal sheath 3 and the insulating wires 5 are in particular made of polyethylene.
  • the rod 2 makes it possible to obtain an air dielectric, of the same thickness as it, around the internal conductor and the spacing of the internal sheath of the internal conductor, for a reduction in thickness and a desired external diameter of this internal sheath .
  • the outer sheath protects the cable and is in particular made of polyvinyl chloride. It is colored in the mass to make the covered elements invisible from the outside. It is preferably extruded under pressure for uniform tightening, without deformation, of the wires 4 and 5 between them and on the internal sheath. It simultaneously ensures a possible resumption of assembly of the wires 4 and 5 on the internal sheath.
  • An insulating tape 7, of reduced thickness, in particular made of polyester, is preferably but not necessarily wound helically with a so-called long pitch on the layer of wires 4 and 5, for their perfect retention during the extrusion of the external sheath .
  • the wires 4 and 5 are preferably themselves assembled on the internal sheath with a very long winding pitch, markedly greater than that of the ribbon.
  • the winding of the ribbon 7 and that of the wires 4 and 5 are in opposite directions.
  • These wires 4 and 5 are each of substantially identical diameter.
  • the wires 4 and 5 cover the entire periphery of the internal sheath 2.
  • the insulating wires 5 in the gap between the conductive wires ensure the removal with regular spacing of the conductive wires and their subsequent equidistant maintenance.
  • the number of wires 4 and 5 and their section are calculated for the continuity of this overlap and for an outside diameter of the resulting coaxial layer.
  • the outer conductive wires 4 are advantageously individually insulated and as identical as possible from each other.
  • Each is formed by a solid conductive core 4A or in a multi-strand variant, in particular in copper or in a variant in another conductive metal or alloy, and a peripheral insulation 4B on the core, in particular in preferably non-colored polyethylene.
  • the insulating wires 5 are also as identical as possible to each other. They are solid and in particular made of preferably colored polyethylene and having a color analogous to that of the outer sheath, or as a variant comprise a central synthetic or textile filament, single-strand or multi-strand, which is coated with insulating plastic.
  • This coaxial cable is of comparable operation and improved performance compared to those of an outer conductor cable provided with a set of continuous and parallel slots along its length, or of an outer conductor cable formed by a plurality of conductive elements or wires spaced from each other to define the radiating slots therebetween.
  • the width of the radiating slots defined by the insulating wires and the possible insulation of the conducting wires is easy to adjust from one cable to another, depending on the frequency of the signals to be transmitted. It is in particular obtained at the desired value by the choice of the section of the conductive cores 4A and / or the thickness of the individual peripheral insulation 4B of the conductive wires.

Landscapes

  • Communication Cables (AREA)
EP95401332A 1994-06-13 1995-06-08 Abstahlendes Hochfrequenz-Koaxialkabel Ceased EP0688061A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9407185A FR2721141B1 (fr) 1994-06-13 1994-06-13 Câble coaxial rayonnant haute fréquence.
FR9407185 1994-06-13

Publications (1)

Publication Number Publication Date
EP0688061A1 true EP0688061A1 (de) 1995-12-20

Family

ID=9464133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401332A Ceased EP0688061A1 (de) 1994-06-13 1995-06-08 Abstahlendes Hochfrequenz-Koaxialkabel

Country Status (2)

Country Link
EP (1) EP0688061A1 (de)
FR (1) FR2721141B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2835241A1 (de) * 1978-08-11 1980-02-28 Aeg Telefunken Kabelwerke Strahlendes kabel
JPS57115003A (en) * 1981-05-28 1982-07-17 Sumitomo Electric Ind Ltd Heat-resistant leakage coaxial cable
GB2094065A (en) 1981-02-27 1982-09-08 Coal Industry Patents Ltd Improvements relating to radio frequency radiating communication cables
JPS58104505A (ja) * 1981-11-20 1983-06-22 Furukawa Electric Co Ltd:The 無線結合用螺旋同軸ケ−ブル

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2835241A1 (de) * 1978-08-11 1980-02-28 Aeg Telefunken Kabelwerke Strahlendes kabel
GB2094065A (en) 1981-02-27 1982-09-08 Coal Industry Patents Ltd Improvements relating to radio frequency radiating communication cables
JPS57115003A (en) * 1981-05-28 1982-07-17 Sumitomo Electric Ind Ltd Heat-resistant leakage coaxial cable
JPS58104505A (ja) * 1981-11-20 1983-06-22 Furukawa Electric Co Ltd:The 無線結合用螺旋同軸ケ−ブル

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 6, no. 211 (E - )<137> 23 October 1982 (1982-10-23) *
PATENT ABSTRACTS OF JAPAN vol. 7, no. 208 (E - 198)<1353> 14 September 1983 (1983-09-14) *

Also Published As

Publication number Publication date
FR2721141A1 (fr) 1995-12-15
FR2721141B1 (fr) 1996-07-19

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