EP0019510A1 - Multipath rotating joint for electromagnetic detection equipment - Google Patents

Multipath rotating joint for electromagnetic detection equipment Download PDF

Info

Publication number
EP0019510A1
EP0019510A1 EP80400574A EP80400574A EP0019510A1 EP 0019510 A1 EP0019510 A1 EP 0019510A1 EP 80400574 A EP80400574 A EP 80400574A EP 80400574 A EP80400574 A EP 80400574A EP 0019510 A1 EP0019510 A1 EP 0019510A1
Authority
EP
European Patent Office
Prior art keywords
ring
fixed
rotating joint
lines
rings
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.)
Granted
Application number
EP80400574A
Other languages
German (de)
French (fr)
Other versions
EP0019510B1 (en
Inventor
Henri Becavin
Alain Bailly
Philippe Lemerle
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 EP0019510A1 publication Critical patent/EP0019510A1/en
Application granted granted Critical
Publication of EP0019510B1 publication Critical patent/EP0019510B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/06—Movable joints, e.g. rotating joints
    • H01P1/062—Movable joints, e.g. rotating joints the relative movement being a rotation
    • H01P1/066—Movable joints, e.g. rotating joints the relative movement being a rotation with an unlimited angle of rotation
    • H01P1/068—Movable joints, e.g. rotating joints the relative movement being a rotation with an unlimited angle of rotation the energy being transmitted in at least one ring-shaped transmission line located around the axis of rotation, e.g. "around the mast" rotary joint

Definitions

  • the present invention relates to a multi-channel rotary joint for electromagnetic detection equipment.
  • Electromagnetic detection equipment generally known as Radar and which include so-called secondary radars generally include an antenna which rotates in a bearing and also sometimes in elevation.
  • a rotary joint which is placed in the feed path of the antenna.
  • the invention therefore relates to a rotary joint, that is to say in fact to a device intended to transmit high frequency energy between two circuits, in general without mechanical contact and in rotation with respect to one another. the other.
  • a primary radar associated with a secondary radar whose antenna is mounted on the antenna of the primary radar where it is necessary to provide for the main or primary radar, a transmit channel, a sum receive channel and at least a reception channel difference and for the secondary radar, a interrogation channel, possibly a control channel for suppressing the secondary lobes, a sum response channel, a channel suppressing the secondary lobes and a difference channel for establishing the crevice.
  • the object of the invention is then to define a multi-way rotary joint of annular type which is free from the drawbacks which have not been reported.
  • a rotary-multi-path joint comprises, arranged around the axial main track a number of annular tracks stacked one on the other perpendicular to the main track, each track comprising a fixed ring and a movable ring and each ring being constituted by a set of two coupled transmission lines, interrupted regularly and arranged in such a way with respect to each other that the electrical continuity of the ring is ensured.
  • phase and the amplitude are uniform at all points of the ring and whatever the angular position of a ring relative to the other, this phase and this amplitude of the signal are transmitted without alteration.
  • Figure 3 shows schematically in partial vertical section, a multi-way rotary joint according to 1! _invention. This joint is limited by the entry guide 12 of the main track transmitting the signals from the main radar in the most probable case where this joint is used with a main radar-secondary radar system, and the exit guide 13.
  • the outlet guide 13 is movable around the axis of rotation 2, relative to the fixed inlet guide 12 and at 1, there is the main track of the joint.
  • the other tracks which are annular are located around the main track in horizontal planes.
  • the fixed guide 12 is attached a metal body 14, having on its dimension parallel to the axis of rotation of the joint, a U-shape, one of the walls 15 of which has bosses 16 serving as support for a dielectric layer 17 serving itself supporting the fixed rings of the different tracks, rings identified by 18, 19, 20 and 180, 190, 200 for example if we consider 3 annular tracks in addition to the main track.
  • the wall 15 is moreover pierced with holes allowing passage to baluns 21, 22, 23.
  • a similar arrangement is made for the mobile part of the seal which comprises a metal body having two branches 24, 25 fixed to the mobile guide 13.
  • the wall 24 is pierced with holes allowing passage to baluns 26, 27, 28 for example and comprises bosses 29, 30 serving as support for a dielectric layer 31 itself serving as support for the movable rings 32, 33, 34 and 320, 330, 340. It can be seen that the dielectric layers or bands 17 and 31 face each other.
  • Figure 4 shows in horizontal section, an annular path of the seal, according to the invention showing how such a path is formed.
  • Each annular track has two concentric rings and each ring consists of two transmission lines interrupted regularly, and arranged relative to each other so that there is no electrical discontinuity.
  • the input ring thus comprises two transmission lines 18, 180 located on either side of a dielectric layer 17.
  • FIG. 4 we see very clearly the interruptions which are created in each of the lines, such as 35, 36 on line 18 and 350 on line 180. It is noted that the interruptions of the second line are found substantially opposite the middle of the sections of the first line.
  • the output ring movable relative to the input ring, also consists of two interrupted transmission lines 32, 320 arranged one relative to the other, on either side of a layer of dielectric 31, like the lines of the first ring.
  • the signals are transmitted between the two rings capacitively.
  • baluns are made necessary by the fact that, the lines being in principle closed on themselves, the phases at the points of attack must be reversed so that the continuity of the currents is assured on the lines.
  • FIG. 3 shows three annular paths, but it is easy to have 5 to 6. Their realization, by way of example is relatively easy.
  • the fixed parts and the mobile parts of the rings are grouped on strips produced according to the printed circuit technique.
  • lines 18-180; 19-190 and 20-200 produced in printed circuits are bonded on either side of a dielectric strip 17 fixed on the metal bosses 16 of the fixed metal body 14 of the joint.
  • lines 32-320, 33-330 and 34-340 fixed on either side of a dielectric strip 31 fixed on the metal bosses 29-30 of the movable body 12 of the joint.
  • the input and output baluns are also produced on printed circuit strips.
  • the thickness of the strips is approximately of the order of 1 to 2/10 mm, the air gaps of the order of 1 to 2 mm, the total height of a ring being substantially equal to 10 millimeters.
  • the length of the discontinuous strands of the lines is of the order of an eighth of the wavelength, a substantially optimal length.
  • the arrangement of the channels according to the invention comprises an adaptation system not described which is intended to compensate for the residual parasitic capacities.
  • the system exhibits good rotational stability, the residual variation of the amplitude being less than 0.1 dB and the residual variation of the phase being less than the degree.
  • a multi-way rotary joint has thus been described, having a relatively large number of annular tracks stacked one on the other around the main track of the joint, each track comprising a fixed ring and a movable ring, one and the other. another by two interrupted transmission lines, arranged in such a way that the signals are transmitted from one ring to the other by capacitive coupling.

Landscapes

  • Waveguide Connection Structure (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Near-Field Transmission Systems (AREA)
  • Manipulator (AREA)

Abstract

Joint tournant multivoies pour équipement de détection électromagnétique dans lequel, les voies autres que la voie principale sont disposées en anneau autour de la voie principale. Chaque voie annulaire comporte un anneau fixe et un anneau mobile, concentriques l'un par rapport à l'autre; chaque anneau est constitué par deux lignes de transmission (18-180-32-320) interrompues de façon régulière (35-36-350-360) et disposées de façon que le couplage soit total entre les deux lignes avec une phase et une amplitude uniformes tout le long des lignes. Application à tout équipement de détection électromagnétique comportant une partie fixe et une partie mobile, et réclamant un grand nombre de voies de transmission.Multichannel rotating joint for electromagnetic detection equipment in which the tracks other than the main track are arranged in a ring around the main track. Each annular track comprises a fixed ring and a movable ring, concentric with one another; each ring consists of two transmission lines (18-180-32-320) interrupted regularly (35-36-350-360) and arranged so that the coupling is complete between the two lines with a phase and an amplitude uniforms along the lines. Application to any electromagnetic detection equipment comprising a fixed part and a mobile part, and requiring a large number of transmission channels.

Description

La présente invention concerne un joint tournant multivoies pour équipement de détection électromagnétique. Les équipements de détection électro-magnétique. connus généralement sous le nom de Radar et qui-englobent les radars dits secondaires comportent généralement une antenne qui tourne en gisement et également quelquefois en site. Pour éviter que la rotation de l'antenne n'entraîne la rotation de tout l'équipement on prévoit ce que l'on a appelé un joint tournant qui se place dans la voie d'alimentation de l'antenne.The present invention relates to a multi-channel rotary joint for electromagnetic detection equipment. Electromagnetic detection equipment. generally known as Radar and which include so-called secondary radars generally include an antenna which rotates in a bearing and also sometimes in elevation. To prevent the rotation of the antenna from causing the rotation of all the equipment, there is provided what has been called a rotary joint which is placed in the feed path of the antenna.

L'invention est donc relative à un joint tournant, c'est-à-dire en fait à un dispositif destiné à transmettre de l'énergie haute fréquence entre deux circuits, en général sans contact mécanique et en rotation l'un par rapport à l'autre.The invention therefore relates to a rotary joint, that is to say in fact to a device intended to transmit high frequency energy between two circuits, in general without mechanical contact and in rotation with respect to one another. the other.

Des joints tournants ont été décrits dans la littérature et on en peut trouver une description relativement abondante dans le chapitre 7 du volume 9 de la collection du MIT (Massachussets Instituteof Technology) "Microwave transmission circuits". Cependant ces joints tournants ne sont pas très bien adaptés aux équipements radar modernes où pour des conditions de bon fonctionnement il est nécessaire de disposer entre l'antenne et les récepteur et émetteur, d'un nombre relativement élevé de voies distinctes, nombre de l'ordre de 4 à 5 au minimum. Ceci est particulièrement le cas d'un radar primaire associé à un radar secondaire dont l'antenne est montée sur l'antenne du radar primaire où il faut prévoir pour le radar principal ou primaire, une voie émission, une voie réception somme et au moins une voie réception différence et pour le radar secondaire, une voie interrogation, éventuellement une voie de commande de suppression des lobes secondaires, une voie de réponse somme, une voie suppression des lobes secondaires et une voie différence pour établir la crevasse.Rotary joints have been described in the literature and a relatively abundant description can be found in chapter 7 of volume 9 of the MIT (Massachussets Instituteof Technology) collection "Microwave transmission circuits". However, these rotary joints are not very well suited to modern radar equipment where for conditions of good functioning it is necessary to have between the antenna and the receiver and transmitter, a relatively high number of distinct channels, number of the minimum order of 4 to 5. This is particularly the case of a primary radar associated with a secondary radar whose antenna is mounted on the antenna of the primary radar where it is necessary to provide for the main or primary radar, a transmit channel, a sum receive channel and at least a reception channel difference and for the secondary radar, a interrogation channel, possibly a control channel for suppressing the secondary lobes, a sum response channel, a channel suppressing the secondary lobes and a difference channel for establishing the crevice.

Avec un joint tournant ressortissant à l'art antérieur du type "Door Knob" par exemple, il n'est pas possible d'avoir plus de trois voies coaxiales. En effet la limitation provient du diamètre extérieur du joint qui doit être bien inférieur à la longueur d'onde. Pour une longueur d'onde de l'ordre de 30 cm, le diamètre qui doit être inférieur à 1 est de l'ordre de 10 cm.With a revolving joint emerging from the prior art of the "Door Knob" type for example, it is not possible to have more than three coaxial channels. Indeed the limitation comes from the outside diameter of the joint which must be much less than the wavelength. For a wavelength of the order of 30 cm, the diameter which must be less than 1 is of the order of 10 cm.

Avec un joint tournant d'un autre type ressortissant également à l'art antérieur, dans lequel les voies autres que la voie principale sont réalisées sous la forme d'anneaux répartis autour de la voie principale il n'est pas non plus possible d'avoir plusieurs voies, pour des raisons de poids et de complé- xité mécanique.

  • ta figure 1 représente de façon très schématique un joint tournant pour radar comportant outre une voie principale axiale 1 d'axe de rotation 2, une autre voie 3 par exemple, annulaire. Cette voie est constituée par deux anneaux identiques 4, 5, l'un 4 étant fixe et l'autre 5 mobile. Un des anneaux 4 comporte une entrée et l'autre anneau 5 une sortie. Chaque anneau comporte un disque 6, 7 dits de couplage, connectés chacun à la borne d'entrée ou de sortie par un répartiteur 8, 9. En 10 se trouve un piège nécessaire pour ce type de joint. L'ensemble se trouve dans un boîtier 11.
  • La figure 2 montre de façon schématique en coupe horizontale un des anneaux. On y voit principalement comment l'anneau est attaqué par les répartiteurs en 4 points a, b, c, d, équiphases. On tente d'obtenir de la sorte une circulation des courants à peu près uniforme sans fluctuation importante. Toutefois, pour des raisons mécaniques, la longueur des anneaux'n'est pas petite devant la longueur d'onde. La phase du signal HF dans ces conditions n'est pas constante en tout point de l'anneau. La rotation d'un des anneaux par rapport à l'autre entraîne des variations d'amplitude de sorte que ni l'amplitude, ni la phase des signaux transmis ne restent constantes. Il est nécessaire de prévoir des pièges qui sont difficiles à réaliser et présentent des fuites et créent des couplages parasites entre voies. Ceci ajouté au fait que les voies annulaires présentent une certaine complé- xité mécanique et que la hauteur de la voie principale est limitée, empêche qu'un joint de ce type puisse comporter un nombre important de voies.
With a rotary joint of another type also belonging to the prior art, in which the tracks other than the main track are made in the form of rings distributed around the main track it is also not possible to have several tracks, for reasons of weight and mechanical complexity.
  • your Figure 1 very schematically shows a rotary joint for radar comprising in addition to an axial main track 1 of axis of rotation 2, another track 3 for example, annular. This channel consists of two identical rings 4, 5, one 4 being fixed and the other 5 mobile. One of the rings 4 has an inlet and the other ring 5 has an outlet. Each ring has a disk 6, 7 called coupling discs, each connected to the input or output terminal by a distributor 8, 9. At 10 is a trap necessary for this type of joint. The assembly is located in a housing 11.
  • Figure 2 shows schematically in section horizontal one of the rings. We mainly see how the ring is attacked by the distributors at 4 points a, b, c, d, equiphases. In this way an attempt is made to obtain an almost uniform circulation of currents without significant fluctuation. However, for mechanical reasons, the length of the rings is not small compared to the wavelength. The phase of the HF signal under these conditions is not constant at any point of the ring. The rotation of one of the rings relative to the other causes variations in amplitude so that neither the amplitude nor the phase of the transmitted signals remain constant. It is necessary to provide traps which are difficult to produce and which exhibit leaks and create parasitic couplings between channels. This added to the fact that the annular tracks have a certain mechanical complexity and that the height of the main track is limited, prevents a joint of this type from having a large number of tracks.

L'objet de l'invention est alors de définir un joint tournant multivoies de type annulaire qui soit exempt des inconvénients qui nnt été signalés.The object of the invention is then to define a multi-way rotary joint of annular type which is free from the drawbacks which have not been reported.

Suivant l'invention, un joint tournant-multivoies comporte, disposés autour de la voie principale axiale un certain nombre de voies annulaires empilées les unes sur les autres perpendiculairement à la voie principale, chaque voie comportant un anneau fixe et un anneau mobile et chaque anneau étant constitué par un ensemble de deux lignes de transmission couplées, interrompues de façon régulière et disposées de façon telle l'une part rapport à l'autre que la continuité électrique de l'anneau soit assurée.According to the invention, a rotary-multi-path joint comprises, arranged around the axial main track a number of annular tracks stacked one on the other perpendicular to the main track, each track comprising a fixed ring and a movable ring and each ring being constituted by a set of two coupled transmission lines, interrupted regularly and arranged in such a way with respect to each other that the electrical continuity of the ring is ensured.

Dans ces conditions, la phase et l'amplitude sont uniformes en tout point de l'anneau et quelle que soit la position angulaire d'un anneau par rapport à l'autre, cette phase et cette amplitude du signal sont transmises sans altération.Under these conditions, the phase and the amplitude are uniform at all points of the ring and whatever the angular position of a ring relative to the other, this phase and this amplitude of the signal are transmitted without alteration.

D'autres avantages et caractéristiques de l'invention apparaitront au cours de la description qui suit d'un exemple de réalisation d'un joint tournant multi- voie annulaire, donnée à l'aide des figures qui représentent outre les figures 1 et 2 ressortissant à l'art antérieur,

  • - la figure 3, une vue en coupe verticale du joint suivant l'invention,
  • - la figure 4, une coupe horizontale d'une voie annulaire du joint et,
  • -.la figure 5, le schéma électrique équivalent d'une portion d'une voie annulaire.
Other advantages and characteristics of the invention will become apparent during the following description of an embodiment of an annular multi-way rotary joint, given with the aid of the figures which, in addition to FIGS. 1 and 2, stand out in the prior art,
  • FIG. 3, a view in vertical section of the seal according to the invention,
  • FIG. 4, a horizontal section of an annular path of the joint and,
  • -. Figure 5, the equivalent electrical diagram of a portion of an annular track.

Dans l'introduction à la présente invention, on a fait remarquer que des joints tournants multivoies, à nombre de voies supérieur à 4 à 5 ne pouvaient être réalisés avec les techniques de l'art antérieur. Il n'est en effet pas possible d'envisager un joint multivoies coaxial, chaque voie devant être disposée à l'intérieur d'uneautre, de sorte que le nombre de 3 est maximal. Il en est pratiquement de même, pour les joints multivoies où les voies autres que la voie principale sont constituées par des anneaux, disposés les uns sur les autres, perpendiculairement à la voie principale. Dans ce cas, outre des questions de contraintes mécaniques, il y a des questions de couplage parasite qui interviennent dues à des fluctuations d'amplitude et de phase des signaux transmis par les anneaux, fluctuations qui sont éliminées par le joint tournant suivant l'invention.In the introduction to the present invention, it was pointed out that multi-way rotary joints with a number of channels greater than 4 to 5 could not be produced with the techniques of the prior art. It is indeed not possible to envisage a coaxial multi-channel joint, each channel having to be arranged inside another, so that the number of 3 is maximum. It is practically the same, for the multichannel joints where the tracks other than the main track consist of rings, arranged one on the other, perpendicular to the main track. In this case, in addition to questions of mechanical constraints, there are questions of parasitic coupling which intervene due to fluctuations in amplitude and phase of the signals transmitted by the rings, fluctuations which are eliminated by the rotary joint according to the invention. .

La figure 3 représente de façon schématique en coupe verticale partielle, un joint tournant multivoies suivant 1!_invention. Ce joint est limité par le guide d'entrée 12 de la voie principale transmettant les signaux du radar principal dans le cas le plus probable où ce joint est utilisé avec un système radar principal-radar secondaire, et le guide de sortie 13.Figure 3 shows schematically in partial vertical section, a multi-way rotary joint according to 1! _invention. This joint is limited by the entry guide 12 of the main track transmitting the signals from the main radar in the most probable case where this joint is used with a main radar-secondary radar system, and the exit guide 13.

Le guide de sortie 13 est mobile autour de l'axe de rotation 2, par rapport au guide d'entrée fixe 12 et en 1, on a la voie principale du joint. Les autres voies qui sont annulaires se trouvent disposées autour de la voie principale dans des plans horizontaux. Au guide fixe 12, se trouve fixé un corps métallique 14, présentant sur sa dimension parallèle à l'axe de rotation du joint, une forme en U, dont une des parois 15 présente des bossages 16 servant de support à une couche diélectrique 17 servant elle même de support aux anneaux fixes des différentes voies, anneaux'repérés par 18, 19, 20 et 180, 190, 200 par exemple si l'on considère 3 voies annulaires en plus de la voie principale. La paroi 15 est de plus percée de trous laissant le passage à des symétriseurs 21, 22, 23.The outlet guide 13 is movable around the axis of rotation 2, relative to the fixed inlet guide 12 and at 1, there is the main track of the joint. The other tracks which are annular are located around the main track in horizontal planes. The fixed guide 12 is attached a metal body 14, having on its dimension parallel to the axis of rotation of the joint, a U-shape, one of the walls 15 of which has bosses 16 serving as support for a dielectric layer 17 serving itself supporting the fixed rings of the different tracks, rings identified by 18, 19, 20 and 180, 190, 200 for example if we consider 3 annular tracks in addition to the main track. The wall 15 is moreover pierced with holes allowing passage to baluns 21, 22, 23.

Une disposition semblable est réalisée pour la partie mobile du joint qui comporte un corps métallique présentant deux branches 24, 25 fixé au guide mobile 13. La paroi 24 est percée de trous laissant le passage à des symétriseurs 26, 27, 28 par exemple et comporte des bossages 29, 30 servant de support à une couche de diélectrique 31 servant elle même de support aux anneaux mobiles 32, 33, 34 et 320, 330, 340. On constate que les couches ou bandes diélectriques 17 et 31 se font face.A similar arrangement is made for the mobile part of the seal which comprises a metal body having two branches 24, 25 fixed to the mobile guide 13. The wall 24 is pierced with holes allowing passage to baluns 26, 27, 28 for example and comprises bosses 29, 30 serving as support for a dielectric layer 31 itself serving as support for the movable rings 32, 33, 34 and 320, 330, 340. It can be seen that the dielectric layers or bands 17 and 31 face each other.

La figure 4, représente en coupe horizontale, une voie annulaire du joint, suivant l'invention montrant comment une telle voie est constituée.Figure 4 shows in horizontal section, an annular path of the seal, according to the invention showing how such a path is formed.

Chaque voie annulaire comporte deux anneaux concentriques et chaque anneau est constitué par deux lignes de transmission interrompues de façon régulière, et disposées l'une par rapport à l'autre de sorte qu'il n'y a pas de discontinuité électrique.Each annular track has two concentric rings and each ring consists of two transmission lines interrupted regularly, and arranged relative to each other so that there is no electrical discontinuity.

L'anneau d'entrée comporte ainsi deux lignes de transmission 18, 180 situées de part et d'autre d'une couche de diélectrique 17. Sur la figure 4 on voit de façon très nette les interruptions qui sont crées dans chacune des lignes, telles que 35, 36 sur la ligne 18 et 350 sur la ligne 180. On remarque que les interruptions de la deuxième ligne se trouvent sensiblement vis à vis du milieu des tronçons de la première ligne.The input ring thus comprises two transmission lines 18, 180 located on either side of a dielectric layer 17. In FIG. 4 we see very clearly the interruptions which are created in each of the lines, such as 35, 36 on line 18 and 350 on line 180. It is noted that the interruptions of the second line are found substantially opposite the middle of the sections of the first line.

L'anneau de sortie, mobile par rapport à l'anneau d'entrée, est également constitué par deux lignes de transmission interrompues 32, 320 disposées l'une par rapport à l'autre, de part et d'autre d'une couche de diélectrique 31, comme les lignes du premier anneau. La transmission des signaux entre les deux anneaux se fait de façon capacitive.The output ring, movable relative to the input ring, also consists of two interrupted transmission lines 32, 320 arranged one relative to the other, on either side of a layer of dielectric 31, like the lines of the first ring. The signals are transmitted between the two rings capacitively.

En choisissant de façon appropriée le coefficient de couplage entre les deux lignes c'est-à-dire la capacité mutuelle Cm entre les deux lignes, on peut démontrer par un calcul aisé, en écrivant les équations décrivant la propagation le long du système de lignes qui a été défini que tous les points des lignes sont en phase les uns avec les autres.By appropriately choosing the coupling coefficient between the two lines, that is to say the mutual capacity Cm between the two lines, we can demonstrate by an easy calculation, by writing the equations describing the propagation along the line system which has been defined that all the points of the lines are in phase with each other.

Sur cette figure 4 on notera la présence à l'entrée E et à la sortie S du système,d'un symétriseur d'entrée 21 et d'un symétriseur de sortie 26. Les symétriseurs sont rendus nécessaire par le fait que, les lignes étant par principe fermées sur elles mêmes, les phases aux points d'attaque doivent être inversées pour que la continuité des courants soit assurée sur les lignes.In this figure 4 we note the presence at input E and at output S of the system, of a balun input 21 and an output balun 26. The baluns are made necessary by the fact that, the lines being in principle closed on themselves, the phases at the points of attack must be reversed so that the continuity of the currents is assured on the lines.

On constate ainsi que de par la disposition réciproque des lignes dans les anneaux et donc des anneaux l'un par rapport à l'autre, la phase et l'amplitude des signaux à transmettre est uniforme en chaque point et est indépendante de la position angulaire des deux anneaux. Les signaux dans une voie annulaire sont donc transmis pratiquement sans perte.It can thus be seen that, by the reciprocal arrangement of the lines in the rings and therefore of the rings with respect to each other, the phase and the amplitude of the signals to be transmitted is uniform at each point and is independent of the angular position of the two rings. The signals in an annular channel are therefore transmitted practically without loss.

On constate d'après la figure 3 que plusieurs voies annulaires peuvent être envisagées, empilées autour de la voie principale du joint, sans que leur nombre soit lîmité-par des contraintes mécaniques comme dans l'art antérieur. La figure 3 montre trois voies annulaires, mais il est aisé d'en disposer de 5 à 6. Leur réalisation, à titre d'exemple est relativement aisée. Les parties fixes et les parties mobiles des anneaux sont groupées sur des bandes réalisées suivant la technique des circuits imprimés. De fait les lignes 18-180; 19-190 et 20-200 réalisées en circuitsimprimés sont collées de part et d'autre d'une bande de diélectrique 17 fixée sur les bossages métalliques 16 du corps métallique fixe 14 du joint. Il en est de même des lignes 32-320, 33-330 et 34-340 fixées de part et d'autre d'une bande de diélectrique 31 fixée sur les bossages métalliques 29-30 du corps mobile 12 du joint. Les symétriseurs d'entrée et de sortie sont également réalisés sur des bandes de circuits imprimés. L'épaisseur des bandes est sensiblement de l'ordre de 1 à 2/lOmm, les entrefers de l'ordre de 1 à 2 mm,la hauteur totale d'un anneau étant sensiblement égale à 10 millimètres.It can be seen from FIG. 3 that several annular tracks can be envisaged, stacked around the main track of the joint, without their number being limited by mechanical stresses as in the prior art. Figure 3 shows three annular paths, but it is easy to have 5 to 6. Their realization, by way of example is relatively easy. The fixed parts and the mobile parts of the rings are grouped on strips produced according to the printed circuit technique. In fact lines 18-180; 19-190 and 20-200 produced in printed circuits are bonded on either side of a dielectric strip 17 fixed on the metal bosses 16 of the fixed metal body 14 of the joint. It is the same for lines 32-320, 33-330 and 34-340 fixed on either side of a dielectric strip 31 fixed on the metal bosses 29-30 of the movable body 12 of the joint. The input and output baluns are also produced on printed circuit strips. The thickness of the strips is approximately of the order of 1 to 2/10 mm, the air gaps of the order of 1 to 2 mm, the total height of a ring being substantially equal to 10 millimeters.

On peut ajouter que la longueur des brins discontinus des lignes est de l'ordre du huitième de la longueur d'onde, longeur sensiblement optimale.It may be added that the length of the discontinuous strands of the lines is of the order of an eighth of the wavelength, a substantially optimal length.

On notera également que la disposition des voies suivant l'invention comporte un système d'adaptation non décrit qui est destiné à compenser les capacités parasites résiduelles. En tout état de cause, le système présente une bonne stabilité à'la rotation, la variation résiduelle de l'amplitude étant inférieure à 0,1 dB et la variation résiduelle de la phase étant inférieure au degré.It will also be noted that the arrangement of the channels according to the invention comprises an adaptation system not described which is intended to compensate for the residual parasitic capacities. In any event, the system exhibits good rotational stability, the residual variation of the amplitude being less than 0.1 dB and the residual variation of the phase being less than the degree.

On a ainsi décrit un joint tournant multivoies, présentant un nombre relativement important de voies annulaires empilées les unes sur les autres autour de la voie principale du joint, chaque voie comportant un anneau fixe et un anneau mobile, contitués l'un et - l'autre par deux lignes de transmission interrompues, disposées de façon telle que les signaux sont transmis d'un anneau à l'autre par couplage capacitif.A multi-way rotary joint has thus been described, having a relatively large number of annular tracks stacked one on the other around the main track of the joint, each track comprising a fixed ring and a movable ring, one and the other. another by two interrupted transmission lines, arranged in such a way that the signals are transmitted from one ring to the other by capacitive coupling.

Claims (7)

1. Joint tournant multivoies pour équipement de détection électromagnétique en particulier, dans lequel les voies prévues en plus de la voie principale(1) sont disposées sous la forme d'anneaux perpendiculairement à la voie principale, chaque voie annulaire comportant un anneau fixe et un anneau mobile entraîné par la partie mobile de la voie principale du joint, caractérisé par le fait que chaque anneau est constitué par un ensemble de deux lignes de transmission(18-180-32-320) couplées interrompues de façon régulière (35-36-32-320) et disposées l'une par rapport à l'autre de façon que la continuité électrique de l'anneau soit assurée, lé couplage entre les lignes étant total..1. Multi-channel rotating joint for electromagnetic detection equipment in particular, in which the channels provided in addition to the main channel (1) are arranged in the form of rings perpendicular to the main channel, each annular channel comprising a fixed ring and a mobile ring driven by the mobile part of the main track of the joint, characterized in that each ring consists of a set of two transmission lines (18-180-32-320) coupled regularly interrupted (35-36- 32-320) and arranged in relation to each other so that the electrical continuity of the ring is ensured, the coupling between the lines being total. 2. Joint tournant multivoies suivant la revendication 1, caractérisé par le fait que la phaseet l'amplitude du courant parcourant un anneau sont uniformes en toutpoint dudit anneau et quelle que soit sa position angulaire par rapport à l'autre anneau.2. Multichannel rotary joint according to claim 1, characterized in that the phase and the amplitude of the current flowing through a ring are uniform at all points of said ring and whatever its angular position relative to the other ring. 3. Joint tournant suivant la revendication 1, caractérisé par le fait que les anneaux constituant une voie annulaire sont concentriques, la transmission des signaux de l'anneau fixe à l'anneau mobile et réciproquement se faisant par couplage capacitif.3. Rotating joint according to claim 1, characterized in that the rings constituting an annular channel are concentric, the transmission of signals from the fixed ring to the movable ring and vice versa being by capacitive coupling. 4. Joint tournant suivant la revendication 1, caractérisé par le fait que les lignes de chaque anneau sont réalisées suivant la technique des circuits imprimés et sont disposées de part et d'autre d'une bande de diélectrique (17-31) fixée au corps métallique (14-12) du joint.4. Rotating joint according to claim 1, characterized in that the lines of each ring are produced according to the printed circuit technique and are arranged on either side of a dielectric strip (17-31) fixed to the body metal (14-12) of the seal. 5. Joint tournant suivant la revendication 4, caractérisé par le fait qu'une bande de circuits imprimés comporte toutes les lignes de transmission relatives à un certain nombre d'anneaux fixes ou mobiles, que ces bandes sont fixées de part et d'autre d'une bande diélectrique (17-31) fixée elle même par des bossages (16-29) au corps métallique, fixe (14) ou mobile (12) du joint, l'ensemble constituant de la sorte un empilement de voies annulaires autour de la voie principale.5. Rotating joint according to claim 4, characterized in that a printed circuit strip comprises all the transmission lines relating to a certain number of fixed or mobile rings, that these bands are fixed on either side of a dielectric band (17-31) fixed itself by bosses (16-29) to the metallic body, fixed ( 14) or mobile (12) of the joint, the assembly thus constituting a stack of annular tracks around the main track. 6. Joint tournant suivant la revendication 1, caractérisé par le fait que chaque ensemble de deux lignes constituant un anneau est connecté à un dispositif symétriseur, (21-25) assurant une inversion de phase au point d'attaque d'une ligne de l'anneau, entraînant la continuité des courants sur la dite ligne.6. Rotating joint according to claim 1, characterized in that each set of two lines constituting a ring is connected to a balancing device, (21-25) ensuring a phase inversion at the point of attack of a line of l 'ring, causing the continuity of currents on said line. 7. Joint tournant suivant la revendication 1, caractérisé par le fait que pour chaque ensemble des deux lignes de transmission constituant un anneau, les interruptions d'une ligne sont sensiblement à l'aplomb du milieu du tronçon de l'autre ligne qui leur font face.7. Rotating joint according to claim 1, characterized in that for each set of two transmission lines constituting a ring, the interruptions of a line are substantially perpendicular to the middle of the section of the other line which make them face.
EP80400574A 1979-05-11 1980-04-25 Multipath rotating joint for electromagnetic detection equipment Expired EP0019510B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7911992 1979-05-11
FR7911992A FR2456398A1 (en) 1979-05-11 1979-05-11 MULTI-CHANNEL ROTATING JOINT FOR ELECTROMAGNETIC DETECTION EQUIPMENT

Publications (2)

Publication Number Publication Date
EP0019510A1 true EP0019510A1 (en) 1980-11-26
EP0019510B1 EP0019510B1 (en) 1985-04-17

Family

ID=9225346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400574A Expired EP0019510B1 (en) 1979-05-11 1980-04-25 Multipath rotating joint for electromagnetic detection equipment

Country Status (5)

Country Link
US (1) US4327334A (en)
EP (1) EP0019510B1 (en)
JP (1) JPS55153401A (en)
DE (1) DE3070498D1 (en)
FR (1) FR2456398A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0082898A1 (en) * 1980-12-16 1983-07-06 I.D.M. Electronics Limited Improvements in and relating to HF slip rings
WO2012159622A1 (en) * 2011-05-24 2012-11-29 Krauss-Maffei Wegmann Gmbh & Co. Kg Swivel coupling for the non-contact transmission of an electrical signal, and vehicle
CN106384862A (en) * 2016-12-02 2017-02-08 中国船舶重工集团公司第七二四研究所 L waveband non-contact small axial size rotating hinge and realization method for the same

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4543549A (en) * 1984-02-03 1985-09-24 United Technologies Corporation Multiple channel rotary joint
JPS61290678A (en) * 1985-06-19 1986-12-20 ヒロセ電機株式会社 Manual connection tool
US4949001A (en) * 1989-07-21 1990-08-14 Campbell Steven R Partial discharge detection method and apparatus
US5475312A (en) * 1994-06-07 1995-12-12 Iris Power Engineering Inc. Method and device for distinguishing between partial discharge and electrical noise
US5668514A (en) * 1994-10-12 1997-09-16 Dai Nippon Printing Co., Ltd. Signal transmission device
EP0707388B1 (en) * 1994-10-12 2005-12-07 Dai Nippon Printing Co., Ltd. Signal transmission device using a fixed and a rotatable body
JPH10124785A (en) * 1996-10-15 1998-05-15 Dainippon Printing Co Ltd Signal transmission device
JPH10124786A (en) * 1996-10-15 1998-05-15 Dainippon Printing Co Ltd Signal transmitter
GB2368470B (en) * 2000-05-10 2004-02-18 Transense Technologies Plc An improved rotary signal coupler
US7623002B2 (en) * 2008-01-30 2009-11-24 The United States Of America As Represented By The Secretary Of The Navy Method for coupling a direct current power source across a nearly frictionless high-speed rotation boundary
WO2020243182A1 (en) * 2019-05-28 2020-12-03 Moog Inc. Graduated frequency response non-contacting slip ring probe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1191485A (en) * 1958-02-13 1959-10-20 Applic Rech Electronique Radio rotary joint
FR1202276A (en) * 1957-03-18 1960-01-08 Gasaccumulator Svenska Ab Rotary coupling device for radio frequency currents
US3104362A (en) * 1959-08-27 1963-09-17 Thompson Ramo Wooldridge Inc Microwave filter
DE1269691B (en) * 1965-08-09 1968-06-06 Siemens Ag Rotary coupling for the transmission of high-frequency wave energy
US3605045A (en) * 1969-01-15 1971-09-14 Us Navy Wide-band strip line frequency-selective circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123782A (en) * 1964-03-03 Around the mast rotary coupling having shielded stator
US4233580A (en) * 1976-11-23 1980-11-11 Spinner Gmbh Rotating coupler for transmitting high frequency energy

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1202276A (en) * 1957-03-18 1960-01-08 Gasaccumulator Svenska Ab Rotary coupling device for radio frequency currents
FR1191485A (en) * 1958-02-13 1959-10-20 Applic Rech Electronique Radio rotary joint
US3104362A (en) * 1959-08-27 1963-09-17 Thompson Ramo Wooldridge Inc Microwave filter
DE1269691B (en) * 1965-08-09 1968-06-06 Siemens Ag Rotary coupling for the transmission of high-frequency wave energy
US3605045A (en) * 1969-01-15 1971-09-14 Us Navy Wide-band strip line frequency-selective circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0082898A1 (en) * 1980-12-16 1983-07-06 I.D.M. Electronics Limited Improvements in and relating to HF slip rings
WO2012159622A1 (en) * 2011-05-24 2012-11-29 Krauss-Maffei Wegmann Gmbh & Co. Kg Swivel coupling for the non-contact transmission of an electrical signal, and vehicle
CN106384862A (en) * 2016-12-02 2017-02-08 中国船舶重工集团公司第七二四研究所 L waveband non-contact small axial size rotating hinge and realization method for the same

Also Published As

Publication number Publication date
JPS6153881B2 (en) 1986-11-19
FR2456398B1 (en) 1983-04-15
FR2456398A1 (en) 1980-12-05
JPS55153401A (en) 1980-11-29
US4327334A (en) 1982-04-27
EP0019510B1 (en) 1985-04-17
DE3070498D1 (en) 1985-05-23

Similar Documents

Publication Publication Date Title
EP0019510A1 (en) Multipath rotating joint for electromagnetic detection equipment
EP0064313B1 (en) Circularly polarised microwave radiating element and flat microwave antenna using an array of such elements
CA1290449C (en) Device for exciting a circularly polarized wage guide by means of a planar antenna
EP0108463A1 (en) Radiating element for cross-polarized microwave signals and planar antenna consisting of an array of such elements
EP0012055A1 (en) Microstrip monopulse primary feed and antenna using same
EP0642139A1 (en) Easily strippable cable
FR2522446A1 (en) DEHASTER WITH VARIABLE PHASEPHASE, USED IN PARTICULAR IN A RADAR ANTENNA SYSTEM
CA1312930C (en) Multichannel combiner/divider
EP3680982A1 (en) Rf radiofrequency rotary joint for rotary device for guiding rf waves and rf rotary device including such a joint
EP3136499A1 (en) Divider/combiner system for a hyperfrequency wave
EP0377155B1 (en) Dual frequency radiating device
FR2643749A1 (en) DEVICE FOR COUPLING A HIGH FREQUENCY COAXIAL LINE
CA1260082A (en) Device with hyperfrequency rotating joint
EP0058283B1 (en) Microwave ferrite device and application of the said device
EP0037309B1 (en) Travelling-wave tube with coupled cavities and with periodic permanent magnet focussing, and amplifier unit with such a tube
EP0860893A1 (en) Concentric set of microwave antennas
EP0174250B1 (en) Device for receiving dual polarized microwave signals
EP0335788B1 (en) Microwave phase shifter
EP0465994B1 (en) Microwave triplate module
EP0073165B1 (en) Microwave switch
EP0305286B1 (en) Medium frequency rotating joint for antenna
FR2460049A1 (en) BANDWHEEL FILTER FOR A HYPERFREQUENCY TRANSMISSION LINE AND A MICROWAVE TRANSISTOR POLARIZATION CIRCUIT COMPRISING THE FILTER
EP0296929B1 (en) Balanced microwave transmission line with two coplanar conductors
FR2497597A1 (en) COAXIAL CABLE WITH LOW FREQUENCY BANDED FILTER
EP0041877A1 (en) Microwave waveguide-coupler

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE GB NL SE

17P Request for examination filed

Effective date: 19801204

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE GB NL SE

REF Corresponds to:

Ref document number: 3070498

Country of ref document: DE

Date of ref document: 19850523

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900331

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19900404

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19900405

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19900430

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910425

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19910426

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19911101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920201

EUG Se: european patent has lapsed

Ref document number: 80400574.2

Effective date: 19911108