EP0074870A1 - Longitudinally and transversally rigid interior conductor support for coax lines and connectors in the high frequency and microwave range - Google Patents

Longitudinally and transversally rigid interior conductor support for coax lines and connectors in the high frequency and microwave range Download PDF

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Publication number
EP0074870A1
EP0074870A1 EP82401562A EP82401562A EP0074870A1 EP 0074870 A1 EP0074870 A1 EP 0074870A1 EP 82401562 A EP82401562 A EP 82401562A EP 82401562 A EP82401562 A EP 82401562A EP 0074870 A1 EP0074870 A1 EP 0074870A1
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Prior art keywords
conductor
support
connectors
longitudinally
coaxial
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Granted
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EP82401562A
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German (de)
French (fr)
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EP0074870B1 (en
Inventor
Hanspeter Staeger
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Radiall Industrie SA
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Radiall Industrie SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • 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
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles

Definitions

  • the present invention relates to an internal conductor coaxial support for high frequency and microwave coaxial lines and connectors.
  • the coaxial lines and the coaxial connectors are used for the transmission under shielding of electromagnetic waves.
  • the line has a longitudinally homogeneous construction and thus a defined characteristic impedance and that the inner conductors arranged concentrically are fixed in longitudinal and transverse directions with respect to the outer conductors without this fixation is not influenced in a harmful way by the electromagnetic waves in circulation.
  • the connectors such supports must also make it possible to absorb, without mechanical deformation, the connection and disconnection forces acting in the longitudinal direction.
  • the supports in the form of discs currently used consist most often of a cylindrical body in solid or cellular dielectric which is placed between elements of internal conductor and external conductor produced in a special way.
  • This arrangement has the disadvantage of reducing the maximum transmissible frequency because, due to the shortening of the wavelength in the dielectric, it occurs already before the limit frequency of the connected coaxial line is obtained, that is to say -already say for lower frequencies, undesirable oscillation modes which impair transmission.
  • the present invention proposes to provide a construction which prevents this frequency limitation and which, thanks to its new design, further improves the longitudinal rigidity and the transverse rigidity of the support compared to the usual constructions currently.
  • the subject of the present invention is a mechanically rigid support for an inner conductor for high frequency and microwave coaxial lines and connectors, characterized in that it comprises an outer conductor element with symmetry of revolution provided with at least four slots and an inner conductor of reduced section to keep the characteristic impedance constant over the length of the support, the inner conductor being automatically centered and immobilized longitudinally by at least four elastic dielectric plates preformed convexly with respect to the median axis and introduced into the slots of the outer conductor element.
  • the external conductor element has a reduced internal diameter relative to the coaxial connection line, ensuring a transmission limit frequency at least as high as the coaxial connection line insulated with air.
  • the disc-shaped support comprises a segmented arrangement of dielectric supports (d) in the form of sheets or plates which, in the form of quarter arcs, automatically center the inner conductor (i) relative to the outer conductor.
  • the inner conductor of reduced section along the length l l ( f ig. 3) can be of circular section of diameter d l (fig. 2) or of polygonal section, in particular square (fig. 2A), ensuring immobilization in rotation compared to the external conductor.
  • An externally pressed locking sleeve (m) reinforces this centering and ensures blocking.
  • the dielectric supports (d) are made of an elastically flexible low loss dielectric material and are introduced after mechanical preformation into the slots of the outer conductor body (n).
  • the ratio of diameters of the outer conductor to the inner conductor must be corrected according to the characteristic impedance formula
  • Z denotes the characteristic impedance in Ohm, ⁇ * , the relative dielectric constant resulting from the introduction of the dielectric plates, D l the internal diameter of the split element of external conductor n, d I the diameter of the conductor interior.
  • the narrowing of the inner conductor i and the reduction of the inner diameter D I of the outer conductor over the partial length t l of the support disc ensures, in addition to the mechanical fixing in the longitudinal direction, that the upper limit frequency, reduced due to the influence of the dielectric in sheets, is again increased so as to be approximately greater than or equal to that of the surrounding coaxial system with air insulation.
  • the support disc of great length compared to the diameter provides a great transverse mechanical resistance so that the support, in its entirety, is insensitive with respect to the bending forces of the inner conductor.
  • the longitudinal fixing of the segments of dielectric sheets is ensured by the fact that a longitudinal edge is applied at ( O ) to the end of the slot while the other edge abuts at (p) on the outer conductor of the coaxial line adjacent to connect.
  • the support disc is produced as illustrated in the drawing.
  • the additional grooves q visible in FIG. 1 in the split body of the outer conductor are used for the electrical compensation of the field distortions resulting from the jump in diameter D / d to D I / d I and are dimensioned in the usual way.

Abstract

Support coaxial de conducteur intérieur comportant au moins quatre plaquettes diélectriques minces (d) mécaniquement préformées qui sont enfoncées dans un élément de conducteur extérieur (n) fendu, et centrent et immobilisent automatiquement un élément de conducteur intérieur de section réduite (i). Le support qui comporte une longueur relativement importante par rapport au diamètre de conducteur extérieur possède une grande rigidité en sens transversal et en sens longitudinal.Coaxial inner conductor support comprising at least four thin mechanically preformed dielectric plates (d) which are embedded in a split outer conductor element (n) and automatically center and immobilize an inner conductor element of reduced section (i). The support which has a relatively large length relative to the diameter of the outer conductor has great rigidity in the transverse direction and in the longitudinal direction.

Description

La présente invention concerne un support coaxial de conducteur intérieur pour lignes et connecteurs coaxiaux haute fréquence et micro-ondes.The present invention relates to an internal conductor coaxial support for high frequency and microwave coaxial lines and connectors.

Les lignes coaxiales et les connecteurs coaxiaux servent à la transmission sous blindage d'ondes electromagnétiques. Dans les dispositifs coaxiaux, il est important, avant tout, que la ligne présente une construction homogène longitudinalement et ainsi une impédance caractéristique définie et que les conducteurs intérieurs disposés concentriquement soient fixés en sens longitudinal et en sens transversal par rapport aux conducteurs extérieurs sans que cette fixation ne soit influencée de façon dommageable par les ondes electromagnétiques en circulation. En ce qui concerne les connecteurs, de tels supports doivent aussi permettre d'absorber sans déformation mécanique les forces de connexion et de déconnexion s'exerçant en sens longitudinal.The coaxial lines and the coaxial connectors are used for the transmission under shielding of electromagnetic waves. In coaxial devices, it is important, above all, that the line has a longitudinally homogeneous construction and thus a defined characteristic impedance and that the inner conductors arranged concentrically are fixed in longitudinal and transverse directions with respect to the outer conductors without this fixation is not influenced in a harmful way by the electromagnetic waves in circulation. With regard to the connectors, such supports must also make it possible to absorb, without mechanical deformation, the connection and disconnection forces acting in the longitudinal direction.

Les supports sous forme de disques actuellement utilisés se composent le plus souvent d'un corps cylindrique en diélectrique plein ou cellulaire qui est mis en place entre des éléments de conducteur intérieur et de conducteur extérieur réalisés de façon spéciale. Cet agencement a pour inconvénient de réduire la fréquence maximale transmissible car, du fait du raccourcissement de la longueur d'onde dans le diélectrique, il se produit déjà avant l'obtention de la fréquence limite de la ligne coaxiale raccordée, c'est-à-dire déjà pour des fréquences plus faibles, des modes d'oscillation indésirables qui nuisent à la transmission.The supports in the form of discs currently used consist most often of a cylindrical body in solid or cellular dielectric which is placed between elements of internal conductor and external conductor produced in a special way. This arrangement has the disadvantage of reducing the maximum transmissible frequency because, due to the shortening of the wavelength in the dielectric, it occurs already before the limit frequency of the connected coaxial line is obtained, that is to say -already say for lower frequencies, undesirable oscillation modes which impair transmission.

La présente invention se propose de fournir une construction qui empêche cette limitation de fréquence et qui, grâce à sa conception nouvelle, améliore en outre la rigidité longitudinale et la rigidité transversale du support par rapport aux réalisations usuelles actuellement.The present invention proposes to provide a construction which prevents this frequency limitation and which, thanks to its new design, further improves the longitudinal rigidity and the transverse rigidity of the support compared to the usual constructions currently.

La présente invention a pour objet un support mécaniquement rigide de conducteur intérieur pour lignes et connecteurs coaxiaux haute fréquence et micro-ondes, caractérisé par le fait qu'il comprend un élément de conducteur extérieur à symétrie de révolution muni d'au moins quatre fentes et un conducteur intérieur de section réduite pour maintenir constante l'impédance caractéristique sur la longueur du support, le conducteur intérieur étant automatiquement centré et immobilisé longitudinalement par au moins quatre plaquettes diélectriques élastiques préformées de manière convexe par rapport à l'axe médian et introduites dans les fentes de l'élément de conducteur extérieur.The subject of the present invention is a mechanically rigid support for an inner conductor for high frequency and microwave coaxial lines and connectors, characterized in that it comprises an outer conductor element with symmetry of revolution provided with at least four slots and an inner conductor of reduced section to keep the characteristic impedance constant over the length of the support, the inner conductor being automatically centered and immobilized longitudinally by at least four elastic dielectric plates preformed convexly with respect to the median axis and introduced into the slots of the outer conductor element.

Dans un mode de réalisation particulier, l'élément de conducteur extérieur présente un diamètre intérieur réduit par rapport à la ligne coaxiale de raccordement, assurant une fréquence limite de transmission au moins aussi élevée que la ligne coaxiale de raccordement isolée à l'air.In a particular embodiment, the external conductor element has a reduced internal diameter relative to the coaxial connection line, ensuring a transmission limit frequency at least as high as the coaxial connection line insulated with air.

Dans le but de mieux faire comprendre l'invention, on va maintenant décrire la structure et le fonctionnement d'un mode de réalisation en se référant au dessin annexé dans lequel :

  • - la figure 1 illustre le support de conducteur intérieur selon l'invention,
  • - la figure 2 est une coupe selon A-A de la figure 1,
  • - la figure 2A est une vue partielle correspondant à la figure 2 d'une variante de réalisation,
  • - la figure 3 est une vue éclatée illustrant le support selon l'invention et les éléments coaxiaux de raccordement du connecteur correspondant et de la ligne coaxiale raccordée.
In order to better understand the invention, we will now describe the structure and operation of an embodiment with reference to the accompanying drawing in which:
  • FIG. 1 illustrates the inner conductor support according to the invention,
  • FIG. 2 is a section along AA of FIG. 1,
  • FIG. 2A is a partial view corresponding to FIG. 2 of an alternative embodiment,
  • - Figure 3 is an exploded view illustrating the support according to the invention and the coaxial elements for connecting the corresponding connector and the connected coaxial line.

En se référant au dessin, on voit que le support en forme de disque selon l'invention comprend un agencement segmentaire d'appuis diélectriques (d) en forme de feuilles ou plaquettes qui, sous la forme de quarts d'arc, centrent automatiquement le conducteur intérieur (i) par rapport au conducteur extérieur. Le conducteur intérieur de section réduite sur la longueur ℓl (fig. 3) peut être de section circulaire de diamètre dl (fig. 2) ou de section polygonale, en particulier carrée (fig. 2A), assurant une immobilisation en rotation par rapport au conducteur extérieur. Un manchon de verrouillage (m) enfoncé extérieurement renforce ce centrage et assure le blocage. Les appuis diélectriques (d) sont constitués en un matériau diélectrique à faibles pertes flexible élastiquement et sont introduits après préformation mécanique dans les fentes du corps de conducteur extérieur (n). Afin de compenser l'influence électrique du diélectrique sur l'impédance caractéristique, le rapport de diamètres du conducteur extérieur par rapport au conducteur intérieur doit être corrigé selon la formule d'impédance caractéristiqueReferring to the drawing, it can be seen that the disc-shaped support according to the invention comprises a segmented arrangement of dielectric supports (d) in the form of sheets or plates which, in the form of quarter arcs, automatically center the inner conductor (i) relative to the outer conductor. The inner conductor of reduced section along the length ℓ l ( f ig. 3) can be of circular section of diameter d l (fig. 2) or of polygonal section, in particular square (fig. 2A), ensuring immobilization in rotation compared to the external conductor. An externally pressed locking sleeve (m) reinforces this centering and ensures blocking. The dielectric supports (d) are made of an elastically flexible low loss dielectric material and are introduced after mechanical preformation into the slots of the outer conductor body (n). In order to compensate for the electrical influence of the dielectric on the characteristic impedance, the ratio of diameters of the outer conductor to the inner conductor must be corrected according to the characteristic impedance formula

Figure imgb0001
Dans cette formule Z désigne l'impédance caractéristique en Ohm, ε*, la constante diélectrique relative résultant de l'introduction des plaquettes de diélectrique, Dl le diamètre intérieur de l'élément fendu de conducteur extérieur n, dI le diamètre du conducteur intérieur. Le rétrécissement du conducteur intérieur i et la réduction du diamètre intérieur DI du conducteur extérieur sur la longueur partielle tl du disque de support assure, outre la fixation mécanique en sens longitudinal, que la fréquence limite supérieure, réduite du fait de l'influence du diélectrique en feuilles, est à nouveau augmentée de manière à être à peu près supérieure ou égale à celle du système coaxial environnant à isolation à l'air. Le disque de support de longueur importante par rapport au diamètre assure une grande résistance mécanique transversale de telle sorte que le support, dans sa totalité, est insensible vis-à-vis des forces de flexion du conducteur intérieur. Dans le conducteur extérieur, la fixation longitudinale des segments de feuilles diélectriques est assurée par le fait qu'un bord longitudinal s'applique en (O) à l'extrémité de la fente tandis que l'autre bord vient buter en (p) sur le conducteur extérieur de la ligne coaxiale adjacente à raccorder.
Figure imgb0001
 In this formula Z denotes the characteristic impedance in Ohm, ε * , the relative dielectric constant resulting from the introduction of the dielectric plates, D l the internal diameter of the split element of external conductor n, d I the diameter of the conductor interior. The narrowing of the inner conductor i and the reduction of the inner diameter D I of the outer conductor over the partial length t l of the support disc ensures, in addition to the mechanical fixing in the longitudinal direction, that the upper limit frequency, reduced due to the influence of the dielectric in sheets, is again increased so as to be approximately greater than or equal to that of the surrounding coaxial system with air insulation. The support disc of great length compared to the diameter provides a great transverse mechanical resistance so that the support, in its entirety, is insensitive with respect to the bending forces of the inner conductor. In the outer conductor, the longitudinal fixing of the segments of dielectric sheets is ensured by the fact that a longitudinal edge is applied at ( O ) to the end of the slot while the other edge abuts at (p) on the outer conductor of the coaxial line adjacent to connect.

On voit sur la vue éclatée de la figure 3, outre la construction du support en forme de disque, le connecteur correspondant b) et la ligne coaxiale raccordée c).We see in the exploded view of Figure 3, in addition to the construction of the disc-shaped support, the corresponding connector b) and the connected coaxial line c).

A titre d'exemple, on a réalisé un disque de support pour un système coaxial avec une fréquence limite supérieure de 40 GHz et une impédance caractéristique de Z = 50 Ω , les dimensions coaxiales étant D = 3,0 mm et d = 1,30 mm. Le disque de support est réalisé comme illustré au dessin.By way of example, a support disc for a coaxial system was produced with an upper limit frequency of 40 GHz and a characteristic impedance of Z = 50 Ω, the coaxial dimensions being D = 3.0 mm and d = 1, 30 mm. The support disc is produced as illustrated in the drawing.

Les dimensions peuvent être toutes rapportées aux dimensions respectives de conducteur extérieur et de conducteur intérieur du système coaxial :

Figure imgb0002

  • d 1 = 0,7.d
  • Longueur L~. 2.D
  • Diamètre DA sur le manchon extérieur m ~ 1,7.D
  • Longueur d'appui ℓI ~ 1,3.D
The dimensions can all be related to the respective dimensions of external conductor and internal conductor of the coaxial system:
Figure imgb0002
  • d 1 = 0.7.d
  • Length L ~. 2.D
  • Diameter D A on the outer sleeve m ~ 1,7.D
  • Support length ℓ I ~ 1,3.D

Les gorges supplémentaires q visibles à la figure 1 dans le corps fendu de conducteur extérieur servent à la compensation électrique des distorsions de champ résultant du saut de diamètre D/d à DI/dI et sont dimensionnées de manière usuelle.The additional grooves q visible in FIG. 1 in the split body of the outer conductor are used for the electrical compensation of the field distortions resulting from the jump in diameter D / d to D I / d I and are dimensioned in the usual way.

Claims (4)

1. Support mécaniquement rigide de conducteur intérieur pour lignes et connecteurs coaxiaux haute fréquence et micro-ondes, caractérisé par le fait qu'il comprend un élément (n) de conducteur extérieur à symétrie de révolution muni d'au moins quatre fentes et un conducteur intérieur (i) de section réduite pour maintenir constante l'impédance caractéristique sur la longueur du support, le conducteur intérieur étant automatiquement centré et immobilisé longitudinalement par au moins quatre plaquettes diélectriques élastiques (d) préformées de manière convexe par rapport à l'axe médian et introduites dans les fentes de l'élément de conducteur extérieur (n).1. Mechanically rigid support for internal conductor for coaxial high-frequency and microwave lines and connectors, characterized in that it comprises an element (n) of external conductor with symmetry of revolution provided with at least four slots and a conductor interior (i) of reduced section to maintain constant the characteristic impedance over the length of the support, the interior conductor being automatically centered and immobilized longitudinally by at least four elastic dielectric plates (d) preformed convexly with respect to the median axis and inserted into the slots of the outer conductor element (n). 2. Support selon la revendication 1, caractérisé par le fait que l'élément de conducteur extérieur (n) présente un diamètre intérieur (D1) réduit par rapport à la ligne coaxiale de raccordement.2. Support according to claim 1, characterized in that the outer conductor element (n) has an inner diameter (D 1 ) reduced relative to the coaxial connection line. 3. Support selon l'une quelconque des revendications 1 et 2, caractérisé par le fait que le conducteur intérieur (i) dans sa zone de section réduite présente une section circulaire.3. Support according to any one of claims 1 and 2, characterized in that the inner conductor (i) in its region of reduced section has a circular section. 4. Support selon l'une quelconque des revendications 1 et 2, caractérisé par le fait que le conducteur intérieur (i) dans sa zone de section réduite présente une section polygonale, notamment carrée.4. Support according to any one of claims 1 and 2, characterized in that the inner conductor (i) in its region of reduced section has a polygonal section, in particular square.
EP82401562A 1981-08-20 1982-08-20 Longitudinally and transversally rigid interior conductor support for coax lines and connectors in the high frequency and microwave range Expired EP0074870B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5370/81A CH658550A5 (en) 1981-08-20 1981-08-20 MECHANICALLY RIGID COAXIAL ARRANGEMENT FOR RADIO FREQUENCY AND MICROWAVE COAXIAL CONNECTIONS AND CABLES.
CH5370/81 1981-08-20

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EP0074870A1 true EP0074870A1 (en) 1983-03-23
EP0074870B1 EP0074870B1 (en) 1985-04-03

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US (1) US4456324A (en)
EP (1) EP0074870B1 (en)
JP (1) JPS5853171A (en)
CA (1) CA1189158A (en)
CH (1) CH658550A5 (en)
DE (2) DE74870T1 (en)

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US4917630A (en) * 1987-10-15 1990-04-17 The Phoenix Company Of Chicago, Inc. Constant impedance high frequency coaxial connector
US4981445A (en) * 1988-09-01 1991-01-01 Helmut Bacher Inexpensive coaxial microwave connector with low loss and reflection, free of slotted-pin expansion problems
US5167532A (en) * 1991-10-18 1992-12-01 Insulated Wire Incorporated Captivation assembly of dielectric elements for supporting and retaining a center contact in a coaxial connector
US5863226A (en) * 1995-12-28 1999-01-26 Lan; Cheng Sun Connector for coaxial cable
US5957724A (en) * 1997-05-12 1999-09-28 Itt Manufacturing Enterprises, Inc. Coax plug insulator
US6015315A (en) * 1998-11-16 2000-01-18 Itt Manufacturing Enterprises, Inc. Impedance improved coax connector
US6478618B2 (en) * 2001-04-06 2002-11-12 Shen-Chia Wong High retention coaxial connector
EP2062333B1 (en) * 2006-09-13 2011-10-19 Huber+Suhner AG Coaxial connecting element for the microwave range
CN102097698A (en) * 2009-12-09 2011-06-15 苏州华旃航天电器有限公司 Medium supporting structure applied to radio-frequency coaxial connector
US9166306B2 (en) 2010-04-02 2015-10-20 John Mezzalingua Associates, LLC Method of terminating a coaxial cable
US8177582B2 (en) 2010-04-02 2012-05-15 John Mezzalingua Associates, Inc. Impedance management in coaxial cable terminations
US7934954B1 (en) 2010-04-02 2011-05-03 John Mezzalingua Associates, Inc. Coaxial cable compression connectors
US8468688B2 (en) 2010-04-02 2013-06-25 John Mezzalingua Associates, LLC Coaxial cable preparation tools
US10364066B2 (en) 2014-06-19 2019-07-30 Mastronardi Produce, Ltd. Ventilated container apparatus
CN106571567B (en) * 2016-10-27 2019-07-23 中航光电科技股份有限公司 Type millimeter-wave coaxial connector and its insulation support body

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CH658550A5 (en) 1986-11-14
DE3262878D1 (en) 1985-05-09
JPS5853171A (en) 1983-03-29
CA1189158A (en) 1985-06-18
JPH0138357B2 (en) 1989-08-14
US4456324A (en) 1984-06-26
EP0074870B1 (en) 1985-04-03
DE74870T1 (en) 1984-01-05

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