EP0018885A1 - Procédé de fabrication de cavités hyperfréquences, noyaux utilisés dans ce procédé et cavités obtenues par ce procédé - Google Patents

Procédé de fabrication de cavités hyperfréquences, noyaux utilisés dans ce procédé et cavités obtenues par ce procédé Download PDF

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Publication number
EP0018885A1
EP0018885A1 EP80400524A EP80400524A EP0018885A1 EP 0018885 A1 EP0018885 A1 EP 0018885A1 EP 80400524 A EP80400524 A EP 80400524A EP 80400524 A EP80400524 A EP 80400524A EP 0018885 A1 EP0018885 A1 EP 0018885A1
Authority
EP
European Patent Office
Prior art keywords
cavity
core
cavities
integral parts
internal
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Withdrawn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
EP80400524A
Other languages
German (de)
English (en)
French (fr)
Inventor
Alfred Van Den Abbeele
Raoul Montagnat
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.)
Thales SA
Original Assignee
Thomson CSF 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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0018885A1 publication Critical patent/EP0018885A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
    • H01P11/008—Manufacturing resonators

Definitions

  • the present invention relates to a method for manufacturing, by electroforming, microwave cavities comprising integral parts integral with the internal walls of the cavity.
  • the present invention aims to avoid the above drawbacks and relates not only to a manufacturing process but also to the cores for the implementation of this process and to the cavities obtained by this process.
  • the baths making it possible to make the various deposits are commercial baths.
  • the baths For the electrolytic adhesion deposits of brass, copper or nickel, the baths must have a composition such that the metal undercoat obtained by chemical means is not attacked, which would cause a defective adhesion of the electrolytic adhesion deposit. . These baths are in common use for the electrolytic treatment of light alloys.
  • the high frequency conductive metal undercoat is obtained using the baths marketed for coating the electronic cavities; these are generally cyanide baths.
  • the baths used for depositing copper up to the desired thickness for the walls of the cavity are acid baths with high penetration, comprising organic agents intended to promote the formation of layers of compact and homogeneous structure.
  • These types of bath are in common use in the technique of printed circuits; they are based on copper sulphate and sulfuric acid; with this type of bath and the process used, correct deposits of copper are obtained in the angles, even when these angles are equal to or slightly less than 90 °.
  • baths of the type discussed for the high frequency conductive metal underlay can be used.
  • the bath used for the electrolytic passivation of the finishing silver deposit is a commercial bath of common use in electrolytic treatments of surfaces.
  • the cores mentioned above are produced so as to electroform the integral parts of the cavity at the same time as the cavity itself.
  • the shapes of integral parts are hollowed out in the cores, with tolerances on their dimensions corresponding to the desired tolerances for the integral parts to be produced.
  • the cores are made entirely of metal.
  • Figures 1, 3, 5 show partially cut cavities so that the integral parts appear which have been inserted therein by electroforming. These three cavities have the form of waveguides and one of the cutouts intended to show their integral parts, is produced according to a longitudinal median plane.
  • Figure 1 is a partial view of a cavity, 1, comprising two rods 10, 11. This cavity, like besides the cavities shown in Figures 3 and 5, was produced by electroforming according to the method described above.
  • FIG. 2 shows a core 2 whose position has been shown in dotted lines to reveal two holes 20, 21 intended to give the rods 10 and 11 of the cavity according to FIG. 1.
  • the core 2 of FIG. 2 is a core of light aluminum alloy (AU4G: aluminum alloy with 4% copper and 1% magnesium), produced by machining.
  • the extraction of this core, after the electrolytic copper layer has been deposited, is done by dissolving in a hot 10% sodium hydroxide solution, under current. air and at a temperature of around 70 ° C.
  • the duration of solubilization of a core under such conditions depends, of course, on the thickness of metal to be dissolved and on the contact surface between the metal and the dissolving liquid.
  • FIG. 5 is a partial view of a cavity 5 comprising three internal partitions 51, 52, 53.
  • the core, 6, having been used to manufacture this cavity is shown in FIG. 6; it is formed by a cylinder in which notches such as 60 are made; it is these notches which, during electroforming, give the internal partitions of the cavity.
  • the core 6 is a core of light aluminum alloy (AG5: aluminum alloy with 5% magnesium), it is obtained by foundry with "lost wax". This core is dissolved, after use, in the same way as the core of Figure 2.
  • FIG. 7 represents a core 7 intended to allow the manufacture, according to the method described above, of a quadruplexer for reuse of frequencies; the q uadruplexer is intended for an antenna.
  • This core comprises a cross element 70 and, on either side of this element, two other elements 71 and 72 bonded to the cross at the intersection of its two branches.
  • the core 7 comprises, at the intersection of the cross, a metallic piece of brass 73, which crosses the cross; this part is hollow and has partitions which, because of their position, could not be obtained by electroforming at the same time as the rest of the quadruplexer.
  • the partial views 1, 3, 5 do not show the flanges of the cavities, used for fixing in the microwave assemblies for which these cavities are intended; Similarly, on the partial views of cores 2, 4, 6, 7, the parts of the core on which, during electroforming, the deposits which constitute the flanges are not shown.
  • This omission is voluntary because on the one hand it makes it possible to better highlight on the drawings the integral parts and the shapes of cores leading to obtaining such integral parts, and on the other hand the obtaining of flanges does not pose any problems from the moment when it is known to manufacture a cavity with internal integral parts.
  • the flanges are obtained by stainless steel parts bonded to the rest of the core and whose faces which must not receive metallic deposits are covered with a layer of air-drying vinyl paint, or plastic tape, or plastic covers.
  • the invention is not limited to the examples described; thus the cohesion of the cores can be increased by mechanical means, metallic or non-metallic, which are removed once the electroforming is completed.
  • variants within the reach of those skilled in the art can be found in the example of the manufacturing process which has been described, in particular as regards the types of metals deposited, the thicknesses of the deposits and the number of deposits; this is how, in certain cases, the second silver plating, that is to say that produced after the core has been removed, can be avoided.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Electroplating Methods And Accessories (AREA)
EP80400524A 1979-05-02 1980-04-18 Procédé de fabrication de cavités hyperfréquences, noyaux utilisés dans ce procédé et cavités obtenues par ce procédé Withdrawn EP0018885A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7911024 1979-05-02
FR7911024A FR2455801A1 (fr) 1979-05-02 1979-05-02 Procede de fabrication de cavites hyperfrequences, noyaux utilises dans ce procede et cavites obtenues par ce procede

Publications (1)

Publication Number Publication Date
EP0018885A1 true EP0018885A1 (fr) 1980-11-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400524A Withdrawn EP0018885A1 (fr) 1979-05-02 1980-04-18 Procédé de fabrication de cavités hyperfréquences, noyaux utilisés dans ce procédé et cavités obtenues par ce procédé

Country Status (2)

Country Link
EP (1) EP0018885A1 (2)
FR (1) FR2455801A1 (2)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2524718A1 (fr) * 1982-04-06 1983-10-07 Thomson Csf Procede de fabrication d'un guide d'onde pour emetteur-recepteur d'ondes electro-magnetiques et guide d'onde obtenu par ce procede
FR2541517A1 (fr) * 1983-02-22 1984-08-24 Kabelmetal Electro Gmbh Procede pour la realisation d'un element constitutif de guide d'ondes
FR2546333A1 (fr) * 1983-05-20 1984-11-23 Thomson Csf Procede de fabrication d'une ligne coaxiale a grande resistance thermique et ligne coaxiale obtenue par ce procede
EP0388290A1 (en) * 1989-03-17 1990-09-19 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Optical waveguides formed from multiple layers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2502405A1 (fr) * 1981-03-18 1982-09-24 Portenseigne Systeme de reception de signaux hyperfrequences a polarisations orthogonales

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
H.W. DETTNER et al.: "HANDBUCH DER GALVANOTECHNIK", Vol. 1, 2eme partie, 1964 Carl Hanser Verlag Munich DE. * Pages 788-791, paragraphes 11.082 et 11.083; page 1029, lignes 34-41; pages 1035 - 1037, paragraphe 15.131, alineas 1,2,3 et dernier alinea; pages 1040-1041, paragraphe 15.14 * *
H.W. DETTNER et al.: "HANDBUCH DER GALVANOTECHNIK", Vol. 2, 1966 Carl Hanser Verlag Munich DE. * Pages 654 -655, paragraphes 19.22, 19.23 et 19.241; page 660, ligne 5;pages 662-663, paragraphe 19-253; page 751, paragraphe 21.7, alinea 1; page 789, paragraphe 22.025, dernier alinea et paragraphe 22.025.1, alinea 1;pages 797-799, paragraphe 22.025.4; page 526, paragraphe 17.156. 104, alinea 2 * *
TELEFUNKEN-ZEITUNG, Vol. 37, No. 2, 1964 Berlin DE E. BERTL et al.: "Galvanoplastische Herstellung von engtolerierten Hohlleiter-Bauelementen", pages 149-153. * En entier * *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2524718A1 (fr) * 1982-04-06 1983-10-07 Thomson Csf Procede de fabrication d'un guide d'onde pour emetteur-recepteur d'ondes electro-magnetiques et guide d'onde obtenu par ce procede
EP0091352A1 (fr) * 1982-04-06 1983-10-12 Alcatel Thomson Faisceaux Hertziens Procédé de fabrication d'un guide d'onde pour émetteur-récepteur d'ondes électro-magnétiques, et guide d'onde obtenu par ce procédé
FR2541517A1 (fr) * 1983-02-22 1984-08-24 Kabelmetal Electro Gmbh Procede pour la realisation d'un element constitutif de guide d'ondes
FR2546333A1 (fr) * 1983-05-20 1984-11-23 Thomson Csf Procede de fabrication d'une ligne coaxiale a grande resistance thermique et ligne coaxiale obtenue par ce procede
EP0129453A1 (fr) * 1983-05-20 1984-12-27 Alcatel Thomson Faisceaux Hertziens Procédé de fabrication d'une ligne coaxiale à grande résistance thermique
EP0388290A1 (en) * 1989-03-17 1990-09-19 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Optical waveguides formed from multiple layers

Also Published As

Publication number Publication date
FR2455801B1 (2) 1985-03-15
FR2455801A1 (fr) 1980-11-28

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Inventor name: MONTAGNAT, RAOUL

Inventor name: VAN DEN ABBEELE, ALFRED