EP0959516A1 - Procédé de fabrication de coudes pour guides d' ondes hyperfréquence, et coudes obtenus selon le procédé - Google Patents

Procédé de fabrication de coudes pour guides d' ondes hyperfréquence, et coudes obtenus selon le procédé Download PDF

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Publication number
EP0959516A1
EP0959516A1 EP99303291A EP99303291A EP0959516A1 EP 0959516 A1 EP0959516 A1 EP 0959516A1 EP 99303291 A EP99303291 A EP 99303291A EP 99303291 A EP99303291 A EP 99303291A EP 0959516 A1 EP0959516 A1 EP 0959516A1
Authority
EP
European Patent Office
Prior art keywords
elbow
steps
change
elbows
manufacture
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Withdrawn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
EP99303291A
Other languages
German (de)
English (en)
Inventor
Alain Le Neve
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.)
TRT Lucent Technologies SA
Original Assignee
TRT Lucent Technologies 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
Priority claimed from EP98460015A external-priority patent/EP0959515A1/fr
Application filed by TRT Lucent Technologies SA filed Critical TRT Lucent Technologies SA
Priority to EP99303291A priority Critical patent/EP0959516A1/fr
Publication of EP0959516A1 publication Critical patent/EP0959516A1/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Withdrawn legal-status Critical Current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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/02—Bends; Corners; Twists
    • H01P1/022—Bends; Corners; Twists in waveguides of polygonal cross-section

Definitions

  • the present invention relates to the manufacture of elbows for rectangular microwave guides.
  • Elbows for rectangular microwave guides are used to make directional changes of approximately 90° or less, both in the plane E containing the electrical field and in the plane H containing the magnetic field.
  • a first type of elbow consists of a tube with a folded rectangular section to whose ends connection flanges are attached by soldering.
  • a monolithic version of this type of elbow is manufactured by molding according to the method known as the lost-wax method. In both cases, the cost of manufacture is relatively high.
  • elbows are made with their tunnel, on the side external to the change in direction, having a transition face with a sequence of steps or levels.
  • This design enables the use of simple and efficient machining technologies such as milling.
  • the assembling of the two parts by screws may give rise to defects of coincidence between the two half-tunnels. These defects, however minute they might be, could have harmful effects.
  • the assembling screws which must be sufficient in number to provide for a satisfactory link, take up a considerable volume of the material of the two parts and therefore hinder the miniaturization desired for most applications.
  • the invention is the result of research conducted on elbows for rectangular microwave guides with a view to achieving the following goals: simplicity of manufacture giving rise to an economical cost price, efficient reproducibility to enable mass production within tight tolerance values, high aptitude for miniaturization through the utmost elimination of the constraints of space requirement other than those inherent in the functional dimensions.
  • the invention consists of a method for the manufacture of an elbow for rectangular microwave waveguides, said elbow comprising an internal tunnel formed by two rectilinear sections that meet to define a dihedron on the internal side of the change in direction and, facing the peak of said dihedron, on the external side of the change in direction, a stepped transition face, wherein the method consists of the making, by machining in one block, from two faces of said block forming the connection ends of the elbow, of two rectangular boreholes that meet so that, at their meeting place, they define said dihedron on the internal side of the change in direction and said stepped transition face on the external side of the change in direction.
  • said boreholes can advantageously be made by the milling technique which provides a totally satisfactory degree of precision for the applications aimed at (working at frequencies of 10 to 20 GHz) and would remain sufficient well beyond these frequencies (at least up to 60 GHz).
  • the totality of the volume of remaining material becomes available to receive fastening screws for the elements to which it will be connected thus enabling a maximum reduction of this volume of material and therefore of the total space requirement of the elbow.
  • FIGS. 1 and 2 illustrate the invention by representing an elbow C for a rectangular microwave waveguide.
  • This is a right-angled elbow with a change in direction in the plane E (containing the electrical field) corresponding to the height b of the guide. It is made of a standard material such as an aluminum alloy.
  • the elbow C consists of a parallelepiped block 1 with two orthogonal connection faces, respectively F1 and F2, between which the internal guiding tunnel T has been machined.
  • this tunnel consists of two orthogonal boreholes A1, A2 with a rectangular section (a, b) respectively formed out of the faces F1 and F2.
  • These two orthogonal boreholes A1, A2 meet in defining, on the internal side of the change in direction ( Figure 2), a straight dihedron with a peak S and, on the external side of the change in direction, a cut-corner transition face P substantially at 45°, facing the peak S and formed by a succession of steps G.
  • the steps G are straight steps. Each of them therefore has a wall parallel to the walls with a width a of the borehole A1 and a wall parallel to the walls with a width a of the borehole A2.
  • the elbow C is advantageously made by milling, for example by a machining process in which, first of all, the borehole A1 is made with a back that is stepped on one of its sides to form the set of steps G. After this, the borehole A2 is made.
  • Figure 3 shows an elbow of the same design as the elbow C described here above which shows all its characteristics and consequently has the same references along with the prime sign.
  • the elbow C' can also be made by milling as explained in the previous paragraph and it actually differs from the elbow C only in the fact that its steps G' have their number considerably increased as compared with the number of the steps G, their dimensions of course being reduced to a corresponding degree can be seen in the succession of parallel lines of fine dots and dashes giving a schematic view of the machining increments in one dimension.
  • the transition face P' becomes a plane wall or more precisely it can be likened in practice to a plane wall in which henceforth the step levels G' no longer have any effect other than that of giving it a certain roughness.
  • Figure 4 illustrates another advantage of the invention enabling several elbows to be associated in the form of several guidance tunnels T1, T2 machined side by side in a single block 10.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Geophysics And Detection Of Objects (AREA)
EP99303291A 1998-05-20 1999-04-27 Procédé de fabrication de coudes pour guides d' ondes hyperfréquence, et coudes obtenus selon le procédé Withdrawn EP0959516A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99303291A EP0959516A1 (fr) 1998-05-20 1999-04-27 Procédé de fabrication de coudes pour guides d' ondes hyperfréquence, et coudes obtenus selon le procédé

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP98460015A EP0959515A1 (fr) 1998-05-20 1998-05-20 Procédé de fabrication de coudes pour guides d'ondes hyperfréquence, et coudes obtenus selon le procédé
EP98460015 1998-05-20
EP99303291A EP0959516A1 (fr) 1998-05-20 1999-04-27 Procédé de fabrication de coudes pour guides d' ondes hyperfréquence, et coudes obtenus selon le procédé

Publications (1)

Publication Number Publication Date
EP0959516A1 true EP0959516A1 (fr) 1999-11-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99303291A Withdrawn EP0959516A1 (fr) 1998-05-20 1999-04-27 Procédé de fabrication de coudes pour guides d' ondes hyperfréquence, et coudes obtenus selon le procédé

Country Status (1)

Country Link
EP (1) EP0959516A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007088183A1 (fr) * 2006-02-03 2007-08-09 Telefonaktiebolaget Lm Ericsson (Publ) Transducteur orthomode
CN100413143C (zh) * 2001-10-30 2008-08-20 汤姆森许可贸易公司 弯曲波导元件和由该元件组成的传输设备
EP3460901A1 (fr) * 2017-09-20 2019-03-27 Nokia Shanghai Bell Co. Ltd. Ensemble de guide d'ondes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2605147A1 (fr) * 1986-10-10 1988-04-15 Thomson Csf Procede de realisation d'une transition hyperfrequence entre deux structures guidees orthogonales et circuit hyperfrequence comportant une telle transition
DE9003388U1 (de) * 1990-03-22 1990-07-26 Siemens AG, 1000 Berlin und 8000 München Rechteckhohlleiter mit H-Versatz
EP0418630A2 (fr) * 1989-09-22 1991-03-27 Siemens Aktiengesellschaft Coude dans le plan E pour un guide d'ondes rectangulaire
DE9202152U1 (de) * 1992-02-19 1992-04-02 Siemens AG, 8000 München Rechteckhohlleiter-H-Winkelstück

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2605147A1 (fr) * 1986-10-10 1988-04-15 Thomson Csf Procede de realisation d'une transition hyperfrequence entre deux structures guidees orthogonales et circuit hyperfrequence comportant une telle transition
EP0418630A2 (fr) * 1989-09-22 1991-03-27 Siemens Aktiengesellschaft Coude dans le plan E pour un guide d'ondes rectangulaire
DE9003388U1 (de) * 1990-03-22 1990-07-26 Siemens AG, 1000 Berlin und 8000 München Rechteckhohlleiter mit H-Versatz
DE9202152U1 (de) * 1992-02-19 1992-04-02 Siemens AG, 8000 München Rechteckhohlleiter-H-Winkelstück

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100413143C (zh) * 2001-10-30 2008-08-20 汤姆森许可贸易公司 弯曲波导元件和由该元件组成的传输设备
WO2007088183A1 (fr) * 2006-02-03 2007-08-09 Telefonaktiebolaget Lm Ericsson (Publ) Transducteur orthomode
EP3460901A1 (fr) * 2017-09-20 2019-03-27 Nokia Shanghai Bell Co. Ltd. Ensemble de guide d'ondes

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