EP0305247B1 - Coupling arrangement between two coaxial microwave structures with different diameters - Google Patents

Coupling arrangement between two coaxial microwave structures with different diameters Download PDF

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Publication number
EP0305247B1
EP0305247B1 EP88401987A EP88401987A EP0305247B1 EP 0305247 B1 EP0305247 B1 EP 0305247B1 EP 88401987 A EP88401987 A EP 88401987A EP 88401987 A EP88401987 A EP 88401987A EP 0305247 B1 EP0305247 B1 EP 0305247B1
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EP
European Patent Office
Prior art keywords
core
coaxial
peripheral
truncated cone
structures
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EP88401987A
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German (de)
French (fr)
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EP0305247A1 (en
Inventor
Bernard Pierre Yves Guillou
Pierre Victor André Lahitte
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Airbus Group SAS
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Airbus Group SAS
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/02—Coupling devices of the waveguide type with invariable factor of coupling
    • H01P5/022—Transitions between lines of the same kind and shape, but with different dimensions
    • H01P5/026—Transitions between lines of the same kind and shape, but with different dimensions between coaxial lines

Definitions

  • the present invention relates to a device for connecting two microwave structures, of the coaxial type, but of different diameters.
  • coaxial lines and their connection accessories are standardized in dimensions. Thus, it is easy to assemble elements belonging to the same dimensional standard. However, it would sometimes be desirable to be able to produce microwave assemblies comprising coaxial elements of different diameters, some of them not necessarily being standardized.
  • a rigid coaxial line which must have a relatively large diameter in order to be able to contain a significant sample of said material.
  • Such a coaxial line can have a diameter of the order of 50 mm.
  • the object of the present invention is a device for connecting two microwave structures, coaxial and of different diameters, without disturbing the propagation of microwave waves.
  • the device for connecting two microwave structures, coaxial and of different diameters, each consisting of a central core and a peripheral envelope is remarkable in that it presents itself even a rigid coaxial structure comprising a central core in the form of a truncated cone, the circular bases of which have sections respectively identical to those of the central cores of said coaxial structures to be connected, as well as a peripheral envelope, the internal wall of which is a surface frustoconical, whose circular bases have sections respectively identical to the internal sections of the peripheral envelopes of said coaxial structures to be connected, in that the small bases of the truncated cones of said central core and of said peripheral envelope of said connector are two parallels of a first sphere centered on the apex of the frustoconical surface of said inner wall e t in that the large bases of the truncated cones of said central core and of said peripheral envelope of said fitting are two parallels of a second sphere concentric with the first.
  • connection device satisfies the above conditions, the propagation of the electromagnetic waves, from one coaxial structure to the other, takes place under optimal conditions.
  • the angle at the top of said frustoconical surface of the internal wall of the peripheral envelope of said fitting is at most equal to 15 °.
  • the transition between the two coaxial structures is then particularly gradual, so that the electromagnetic waves undergo little disturbance.
  • the truncated cone of the central core of said device is extended, on both sides, by cylindrical core portions of sections respectively identical to those of the cores of said coaxial structures to be connected, while said internal frustoconical surface of said peripheral envelope of said device is extended, on both sides, by cylindrical surfaces, the sections of which are respectively identical to the internal sections of the envelopes of said structures to be connected.
  • the central core of said connection device is secured to the casing by means of annular spacers.
  • these spacers it is advantageous for these spacers to be arranged between the cylindrical extensions of said core and of said peripheral envelope. At least one of these spacers can be housed, at its internal and / or external peripheries, in facing grooves, respectively formed in said core and / or in said peripheral envelope. It is then advantageous that such a spacer is arranged in the vicinity of one end of said connecting device, that said groove is delimited between one face of said peripheral envelope and a nozzle capable of being assembled to said body and that said core is made of at least two integral parts.
  • the connector 1, illustrated diagrammatically in FIG. 1, is intended to connect two coaxial structures for microwave, for example lines 2 and 3, of different diameters.
  • the coaxial line 2 of smaller diameter comprises a central cylindrical core 4, of diameter d1, and a peripheral cylindrical envelope 5, of internal diameter D1.
  • the coaxial line 3, of larger diameter comprises a central cylindrical core 6, of diameter d2, and a peripheral cylindrical envelope 7, of internal diameter D2.
  • connection 1 with respectively the coaxial lines 2 and 3 are assumed to be carried out in planes P1 and P2, using means not shown, which may have any known structure.
  • the connector 1 also has a coaxial structure, with a central core 8 and a peripheral envelope 9.
  • a central core 8 When said connector 1 joins the coaxial lines 2 and 3, these three elements are coaxial, at least in the vicinity of said connector 1.
  • Annular spacers 11 secure the core 8 of the envelope 9.
  • the central core 8 of the connector 1 has a frustoconical part 8a whose diameters of its end bases 12 and 13 are respectively equal to d1 and d2.
  • This frustoconical part 8a is extended, towards the coaxial line 2, by a cylindrical end part 8b, of diameter equal to d1, intended to be connected to the core 2 and, towards the coaxial line 3, by a part of cylindrical end 8c, of diameter equal to d2, intended to be connected to the core 6.
  • the peripheral envelope 9 of the connector 1 also has a frustoconical part 9a, extended on either side by parts 9b and 9c, respectively intended to be connected to the peripheral envelopes 5 and 7.
  • the internal wall 10 of the frustoconical part 9 a of the envelope 9 is a frustoconical surface and its angle at the apex A is at most equal to 15 °. Since the arrangement of the fitting is coaxial, the vertex B of the conical surface 10 is on the axis of said fitting 1.
  • the diameters of the bases 14 and 15 of the internal wall 10 are respectively equal to D2 and D1.
  • the small bases 13 and 15, respectively of the core part 8a and the internal wall 10 are parallels of a first sphere C1 centered at B, while the large bases 12 and 14, respectively of said core part 8a and of said internal wall 10, are parallels of a second sphere C2, also centered at B.
  • an electromagnetic wave passes with a minimum of disturbances from line 2 on line 3, and vice versa.
  • the spacers 11 securing the core 8 of the peripheral envelope 9 are located opposite the cylindrical parts 8b, 9b and 8c, 9c thereof and are engaged in grooves 11a, 11b formed in the surface of said parts.
  • connection device 1 In Figure 2, there is shown a practical embodiment of the connecting device according to the invention.
  • screw connection means 16 and 17 are provided, intended respectively to mechanically and electrically connect the connection device 1 to the line, or structure, 2 (not shown) and to the line, or structure 3. .
  • connection means 16 are formed by a screwed end piece further constituting the cylindrical part 9b of the casing 9, and intended to connect the core 8 to the core 4 and the envelope 9 to the envelope 5.
  • the connecting means 17 comprise a captive nut making it possible to press the corresponding ends of the cores 8 and 6 and the envelopes 7 and 9, one against the other.
  • the cylindrical part 9c is formed in part by a ring 20 secured by screwing the conical part 9a.
  • the spacer 11, disposed on the side of the smallest diameter is disposed in a groove in the part 8b, but is forced into the cylindrical part 9b.
  • the spacer 11, disposed on the side of the large diameter is disposed in such a groove in the part 8c and in a groove in the part 9c.
  • the part 8c consists of two parts which can be assembled by a screw 18, while the cylindrical part 9c comprises, in addition to the plate 20, a screwable end piece 21, so that the spacer 11 can be pressed between the ring 20 and end piece 21.
  • Guiding and centering means 19 are associated with the connecting means 17.

Description

La présente invention concerne un dispositif pour le raccord de deux structures pour hyperfréquences, de type coaxial, mais de diamètres différents.The present invention relates to a device for connecting two microwave structures, of the coaxial type, but of different diameters.

On sait que les lignes coaxiales et leurs accessoires de branchement sont standardisés en dimensions. Ainsi, il est facile de réaliser le montage d'éléments appartenant au même standard dimensionnel. Cependant, il serait parfois souhaitable de pouvoir réaliser des montages pour hyperfréquence comportant des éléments coaxiaux de diamètres différents, certains d'entre eux n'étant pas obligatoirement standardisés. Par exemple, dans la demande de brevet déposée ce jour au nom de la Demanderesse pour "Procédé et dispositif pour l'estimation des caractéristiques électromagnétiques d'un matériau diélectrique ou magnétique" et publiée sous le numéro EP-A-O 307 621, on décrit une ligne coaxiale rigide devant présenter un diamètre relativement important pour pouvoir contenir un échantillon significatif dudit matériau. Une telle ligne coaxiale peut présenter un diamètre de l'ordre de 50 mm. Par ailleurs, il est avantageux d'effectuer les branchements d'une telle ligne coaxiale de grand diamètre, au moyen de connexions de diamètre plus faible et standardisé, par exemple 7 mm.We know that coaxial lines and their connection accessories are standardized in dimensions. Thus, it is easy to assemble elements belonging to the same dimensional standard. However, it would sometimes be desirable to be able to produce microwave assemblies comprising coaxial elements of different diameters, some of them not necessarily being standardized. For example, in the patent application filed today in the name of the Applicant for "Method and device for the estimation of the electromagnetic characteristics of a dielectric or magnetic material" and published under the number EP-AO 307 621, there is described a rigid coaxial line which must have a relatively large diameter in order to be able to contain a significant sample of said material. Such a coaxial line can have a diameter of the order of 50 mm. Furthermore, it is advantageous to make the connections of such a coaxial line of large diameter, by means of connections of smaller and standardized diameter, for example 7 mm.

Aussi, l'objet de la présente invention est un dispositif permettant de raccorder deux structures pour hyperfréquences, coaxiales et de diamètres différents, sans perturbation de la propagation des ondes à hyperfréquence.Also, the object of the present invention is a device for connecting two microwave structures, coaxial and of different diameters, without disturbing the propagation of microwave waves.

A cette fin, selon l'invention, le dispositif pour le raccord de deux structures pour hyperfréquences, coaxiales et de diamètres différents, constituées chacune d'une âme centrale et d'une enveloppe périphérique, est remarquable en ce qu'il présente lui-même une structure coaxiale rigide comportant une âme centrale en forme de tronc de cône, dont les bases circulaires ont des sections respectivement identiques à celles des âmes centrales desdites structures coaxiales à raccorder, ainsi qu'une enveloppe périphérique, dont la paroi interne est une surface tronconique, dont les bases circulaires ont des sections respectivement identiques aux sections internes des enveloppes périphériques desdites structures coaxiales à raccorder, en ce que les petites bases des troncs de cône de ladite âme centrale et de ladite enveloppe périphérique dudit raccord sont deux parallèles d'une première sphère centrée sur le sommet de la surface tronconique de ladite paroi interne et en ce que les grandes bases des troncs de cône de ladite âme centrale et de ladite enveloppe périphérique dudit raccord sont deux parallèles d'une seconde sphère concentrique à la première.To this end, according to the invention, the device for connecting two microwave structures, coaxial and of different diameters, each consisting of a central core and a peripheral envelope, is remarkable in that it presents itself even a rigid coaxial structure comprising a central core in the form of a truncated cone, the circular bases of which have sections respectively identical to those of the central cores of said coaxial structures to be connected, as well as a peripheral envelope, the internal wall of which is a surface frustoconical, whose circular bases have sections respectively identical to the internal sections of the peripheral envelopes of said coaxial structures to be connected, in that the small bases of the truncated cones of said central core and of said peripheral envelope of said connector are two parallels of a first sphere centered on the apex of the frustoconical surface of said inner wall e t in that the large bases of the truncated cones of said central core and of said peripheral envelope of said fitting are two parallels of a second sphere concentric with the first.

La Demanderesse a en effet trouvé que si le dispositif de raccord satisfaisait aux conditions ci-dessus, la propagation des ondes électromagnétiques, d'une structure coaxiale à l'autre, s'effectuait dans des conditions optimales.The Applicant has in fact found that if the connection device satisfies the above conditions, the propagation of the electromagnetic waves, from one coaxial structure to the other, takes place under optimal conditions.

De préférence, l'angle au sommet de ladite surface tronconique de la paroi interne de l'enveloppe périphérique dudit raccord est au plus égal à 15°. En effet, la transition entre les deux structures coaxiales est alors particulièrement progressive, de sorte que les ondes électromagnétiques subissent peu de perturbations.Preferably, the angle at the top of said frustoconical surface of the internal wall of the peripheral envelope of said fitting is at most equal to 15 °. Indeed, the transition between the two coaxial structures is then particularly gradual, so that the electromagnetic waves undergo little disturbance.

Avantageusement, le tronc de cône de l'âme centrale dudit dispositif est prolongé, de part et d'autre, par des portions d'âme cylindriques de sections respectivement identiques à celles des âmes desdites structures coaxiales à raccorder, tandis que ladite surface tronconique interne de ladite enveloppe périphérique dudit dispositif est prolongée, de part et d'autre, par des surfaces cylindriques, dont les sections sont respectivement identiques aux sections internes des enveloppes desdites structures à raccorder.Advantageously, the truncated cone of the central core of said device is extended, on both sides, by cylindrical core portions of sections respectively identical to those of the cores of said coaxial structures to be connected, while said internal frustoconical surface of said peripheral envelope of said device is extended, on both sides, by cylindrical surfaces, the sections of which are respectively identical to the internal sections of the envelopes of said structures to be connected.

Dans un mode de réalisation avantageux du dispositif selon l'invention, l'âme centrale dudit dispositif de raccord est solidarisée de l'enveloppe par l'intermédiaire d'entretoises annulaires. Dans ce cas, il est avantageux que ces entretoises soient disposées entre les prolongements cylindriques de ladite âme et de ladite enveloppe périphérique. Au moins l'une de ces entretoises peut être logée, à ses périphéries interne et/ou externe, dans des gorges en regard, respectivement pratiquées dans ladite âme et/ou dans ladite enveloppe périphérique. Il est alors avantageux qu'une telle entretoise soit disposée au voisinage d'une extrémité dudit dispositif de raccord, que ladite gorge soit délimitée entre une face de ladite enveloppe périphérique et un embout susceptible d'être assemblé audit corps et que ladite âme soit réalisée en au moins deux parties solidarisables.In an advantageous embodiment of the device according to the invention, the central core of said connection device is secured to the casing by means of annular spacers. In this case, it is advantageous for these spacers to be arranged between the cylindrical extensions of said core and of said peripheral envelope. At least one of these spacers can be housed, at its internal and / or external peripheries, in facing grooves, respectively formed in said core and / or in said peripheral envelope. It is then advantageous that such a spacer is arranged in the vicinity of one end of said connecting device, that said groove is delimited between one face of said peripheral envelope and a nozzle capable of being assembled to said body and that said core is made of at least two integral parts.

Les figures du dessin annexé feront bien comprendre comment l'invention peut être réalisée. Sur ces figures, des références identiques désignent des éléments identiques.

  • La figure 1 est une vue schématique, en coupe axiale, illustrant le raccord conforme à la présente invention.
  • La figure 2 montre, également en coupe axiale, un mode de réalisation du raccord conforme à la présente invention.
The figures of the appended drawing will make it clear how the invention can be implemented. In these figures, identical references designate identical elements.
  • Figure 1 is a schematic view, in axial section, illustrating the connector according to the present invention.
  • Figure 2 shows, also in axial section, an embodiment of the connector according to the present invention.

Le raccord 1, illustré schématiquement sur la figure 1, est destiné à raccorder deux structures coaxiales pour hyperfréquence, par exemple des lignes 2 et 3, de diamètres différents.The connector 1, illustrated diagrammatically in FIG. 1, is intended to connect two coaxial structures for microwave, for example lines 2 and 3, of different diameters.

La ligne coaxiale 2, de plus petit diamètre, comporte une âme cylindrique centrale 4, de diamètre d1, et une enveloppe cylindrique périphérique 5, de diamètre interne D1. De même, la ligne coaxiale 3, de plus grand diamètre, comporte une âme cylindrique centrale 6, de diamètre d2, et une enveloppe cylindrique périphérique 7, de diamètre interne D2.The coaxial line 2, of smaller diameter, comprises a central cylindrical core 4, of diameter d1, and a peripheral cylindrical envelope 5, of internal diameter D1. Likewise, the coaxial line 3, of larger diameter, comprises a central cylindrical core 6, of diameter d2, and a peripheral cylindrical envelope 7, of internal diameter D2.

Les liaisons électriques et mécaniques du raccord 1 avec respectivement les lignes coaxiales 2 et 3 sont supposés être réalisées dans des plans P1 et P2, à l'aide de moyens non représentés, pouvant présenter toute structure connue.The electrical and mechanical connections of connection 1 with respectively the coaxial lines 2 and 3 are assumed to be carried out in planes P1 and P2, using means not shown, which may have any known structure.

Le raccord 1 présente également une structure coaxiale, avec une âme centrale 8 et une enveloppe périphérique 9. Lorsque ledit raccord 1 réunit les lignes coaxiales 2 et 3, ces trois éléments sont coaxiaux, au moins au voisinage dudit raccord 1. Des entretoises annulaires 11 solidarisent l'âme 8 de l'enveloppe 9.The connector 1 also has a coaxial structure, with a central core 8 and a peripheral envelope 9. When said connector 1 joins the coaxial lines 2 and 3, these three elements are coaxial, at least in the vicinity of said connector 1. Annular spacers 11 secure the core 8 of the envelope 9.

L'âme centrale 8 du raccord 1 présente une partie tronconique 8a dont les diamètres de ses bases d'extrémité 12 et 13 sont respectivement égaux à d1 et d2. Cette partie tronconique 8a est prolongée, vers la ligne coaxiale 2, par une partie d'extrémité cylindrique 8b, de diamètre égale à d1, destinée à se raccorder à l'âme 2 et, vers la ligne coaxiale 3, par une partie d'extrémité cylindrique 8c, de diamètre égal à d2, destinée à se raccorder à l'âme 6.The central core 8 of the connector 1 has a frustoconical part 8a whose diameters of its end bases 12 and 13 are respectively equal to d1 and d2. This frustoconical part 8a is extended, towards the coaxial line 2, by a cylindrical end part 8b, of diameter equal to d1, intended to be connected to the core 2 and, towards the coaxial line 3, by a part of cylindrical end 8c, of diameter equal to d2, intended to be connected to the core 6.

L'enveloppe périphérique 9 du raccord 1 présente également une partie tronconique 9a, prolongée de part et d'autre par des parties 9b et 9c, respectivement destinées à être reliées aux enveloppes périphériques 5 et 7. La paroi interne 10 de la partie tronconique 9a de l'enveloppe 9 est une surface tronconique et son angle au sommet A est au plus égal à 15°. Puisque la disposition du raccord est coaxiale, le sommet B de la surface conique 10 se trouve sur l'axe dudit raccord 1. Les diamètres des bases 14 et 15 de la paroi interne 10 sont respectivement égaux à D2 et D1.The peripheral envelope 9 of the connector 1 also has a frustoconical part 9a, extended on either side by parts 9b and 9c, respectively intended to be connected to the peripheral envelopes 5 and 7. The internal wall 10 of the frustoconical part 9 a of the envelope 9 is a frustoconical surface and its angle at the apex A is at most equal to 15 °. Since the arrangement of the fitting is coaxial, the vertex B of the conical surface 10 is on the axis of said fitting 1. The diameters of the bases 14 and 15 of the internal wall 10 are respectively equal to D2 and D1.

Selon la particularité essentielle de la présente invention, les petites bases 13 et 15, respectivement de la partie d'âme 8a et de la paroi interne 10, sont des parallèles d'une première sphère C1 centrée en B, tandis que les grandes bases 12 et 14, respectivement de ladite partie d'âme 8a et de ladite paroi interne 10, sont des parallèles d'une seconde sphère C2, également centrée en B. A ces conditions, une onde électromagnétique passe avec un minimum de perturbations de la ligne 2 à la ligne 3, et vice-versa.According to the essential feature of the present invention, the small bases 13 and 15, respectively of the core part 8a and the internal wall 10, are parallels of a first sphere C1 centered at B, while the large bases 12 and 14, respectively of said core part 8a and of said internal wall 10, are parallels of a second sphere C2, also centered at B. Under these conditions, an electromagnetic wave passes with a minimum of disturbances from line 2 on line 3, and vice versa.

Comme on peut le voir, les entretoises 11 solidarisant l'âme 8 de l'enveloppe périphérique 9 se trouvent en regard des parties cylindriques 8b, 9b et 8c, 9c de celles-ci et sont engagées dans des gorges 11a, 11b pratiquées dans la surface desdites parties.As can be seen, the spacers 11 securing the core 8 of the peripheral envelope 9 are located opposite the cylindrical parts 8b, 9b and 8c, 9c thereof and are engaged in grooves 11a, 11b formed in the surface of said parts.

Sur la figure 2, on a représenté un mode de réalisation pratique du dispositif de raccord selon l'invention. Dans ce mode de réalisation, on prévoit des moyens de liaison par vissage 16 et 17, destinés respectivement à relier mécaniquement et électriquement le dispositif de raccord 1 à la ligne, ou structure, 2 (non représentée) et à la ligne, ou structure 3.In Figure 2, there is shown a practical embodiment of the connecting device according to the invention. In this embodiment, screw connection means 16 and 17 are provided, intended respectively to mechanically and electrically connect the connection device 1 to the line, or structure, 2 (not shown) and to the line, or structure 3. .

Les moyens de liaison 16 sont formés par un embout vissé constituant de plus la partie cylindrique 9b de l'enveloppe 9, et destiné à relier l'âme 8 à l'âme 4 et l'enveloppe 9 à l'envelope 5. Les moyens de liaison 17 comportent un écrou prisonnier permettant de presser les extrémités correspondantes des âmes 8 et 6 et des enveloppes 7 et 9, l'une contre l'autre. Pour établir le contact électrique entre lesdites âmes ou lesdites enveloppes, réciproquement, il est possible d'utiliser des joints conducteurs connus, ou bien le système décrit dans la demande de brevet déposée ce jour au nom de la Demanderesse pour "Système de liaison à joint pour éléments travaillant en hyperfréquence" et publiée sous le numéro EP-A-O 304 365.The connection means 16 are formed by a screwed end piece further constituting the cylindrical part 9b of the casing 9, and intended to connect the core 8 to the core 4 and the envelope 9 to the envelope 5. The connecting means 17 comprise a captive nut making it possible to press the corresponding ends of the cores 8 and 6 and the envelopes 7 and 9, one against the other. To establish the electrical contact between said cores or said envelopes, conversely, it is possible to use known conductive joints, or else the system described in the patent application filed today in the name of the Applicant for "Joint connection system for elements working at microwave "and published under the number EP-AO 304 365.

La partie cylindrique 9c est formée en partie par une bague 20 solidarisée par vissage de la partie conique 9a.The cylindrical part 9c is formed in part by a ring 20 secured by screwing the conical part 9a.

L'entretoise 11, disposée du côté du plus petit diamètre est disposée dans une gorge de la partie 8b, mais est enfoncée à force dans la partie cylindrique 9b. L'entretoise 11, disposée du côté du grand diamètre, est disposée dans une telle gorge de la partie 8c et dans une gorge de la partie 9c. A cet effet, la partie 8c est constituée de deux parties assemblables par une vis 18, tandis que la partie cylindrique 9c comporte, en plus de la plaque 20, un embout vissable 21, de sorte que l'entretoise 11 peut être pressée entre la bague 20 et l'embout 21.The spacer 11, disposed on the side of the smallest diameter is disposed in a groove in the part 8b, but is forced into the cylindrical part 9b. The spacer 11, disposed on the side of the large diameter, is disposed in such a groove in the part 8c and in a groove in the part 9c. To this end, the part 8c consists of two parts which can be assembled by a screw 18, while the cylindrical part 9c comprises, in addition to the plate 20, a screwable end piece 21, so that the spacer 11 can be pressed between the ring 20 and end piece 21.

Des moyens de guidage et de centrage 19 sont associés aux moyens de liaison 17.Guiding and centering means 19 are associated with the connecting means 17.

Claims (7)

1. Device for connecting together two ultra-high frequency structures (2,3), which are coaxial but of different diameters, each formed of a central core (4,6) and a peripheral sheath (5,7), which device has itself a rigid coaxial structure comprising a central core (8) in the shape of a truncated cone, whose circular bases (12,13) have sections respectively identical to those of the central cores of said coaxial structures to be connected together, as well as a peripheral sheath (9), whose internal wall (10) is a truncated cone shaped surface, whose circular bases (14,15) have sections respectively identical to the internal sections of the peripheral sheaths of said coaxial structures to be connected together,
characterized in that the small bases (13,15) of the truncated cones of said central core and of said peripheral sheath of said connection are two parallels of a first sphere (C1) centered on the apex (B) of the truncated cone shaped surface of said internal wall and in that the large bases (12,14) of the truncated cones of said central core and of said peripheral sheath of said connection are two parallels of a second sphere (C2) concentric to the first one.
2. Device according to claim 1,
characterized in that the angle at the apex of said truncated cone shaped surface of the internal wall of the peripheral sheath of said connection is at most equal to 15°.
3. Device according to one of claims 1 or 2,
characterized in that the truncated cone of the central core of said device is extended, on each side, by cylindrical core portions (8b,8c) with sections respectively identical to those of the cores of said coaxial structures to be connected together, whereas said internal truncated cone shaped surface of said peripheral sheath of said device is extended, on each side, by cylindrical surfaces (9b,9c) whose sections are respectively identical to the internal sections of the sheaths of said structures to be connected together.
4. Device according to claims 1 to 3,
characterized in that the central core of said connection device is fixed to the sheath by means of annular spacers (11).
5. Device according to claim 4,
characterized in that said spacers are disposed in the cylindrical extensions of said core and of said peripheral sheath.
6. Device according to claims 4 and 5,
characterized in that at least one of these spacers may be housed, at its internal and/or external peripheries, in facing grooves, formed respectively in said core and/or in said peripheral sheath.
7. Device according to claim 6,
characterized in that said spacer is disposed in the vicinity of one end of said connection device, in that said groove is defined between a face of said peripheral sheath and an end-piece able to be assembled to said body and in that said core is made from at least two interlockable portions.
EP88401987A 1987-08-03 1988-07-29 Coupling arrangement between two coaxial microwave structures with different diameters Expired - Lifetime EP0305247B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8711010A FR2619253B1 (en) 1987-08-03 1987-08-03 DEVICE FOR JOINING TWO STRUCTURES FOR MICROWAVE, COAXIAL AND DIFFERENT DIAMETERS
FR8711010 1987-08-03

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EP0305247A1 EP0305247A1 (en) 1989-03-01
EP0305247B1 true EP0305247B1 (en) 1992-04-01

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US (1) US4853656A (en)
EP (1) EP0305247B1 (en)
JP (1) JPS6443981A (en)
CA (1) CA1283185C (en)
DE (1) DE3869698D1 (en)
FR (1) FR2619253B1 (en)

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CA1283185C (en) 1991-04-16
US4853656A (en) 1989-08-01
FR2619253A1 (en) 1989-02-10
EP0305247A1 (en) 1989-03-01
FR2619253B1 (en) 1990-01-19
JPS6443981A (en) 1989-02-16
DE3869698D1 (en) 1992-05-07
JPH0432513B2 (en) 1992-05-29

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