EP0041877A1 - Microwave waveguide-coupler - Google Patents

Microwave waveguide-coupler Download PDF

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Publication number
EP0041877A1
EP0041877A1 EP19810400789 EP81400789A EP0041877A1 EP 0041877 A1 EP0041877 A1 EP 0041877A1 EP 19810400789 EP19810400789 EP 19810400789 EP 81400789 A EP81400789 A EP 81400789A EP 0041877 A1 EP0041877 A1 EP 0041877A1
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Prior art keywords
waveguides
microwave coupler
microwave
wall
slots
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EP19810400789
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German (de)
French (fr)
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EP0041877B1 (en
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Daniel Bedoure
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Thales SA
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Thomson CSF SA
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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
    • H01P5/12—Coupling devices having more than two ports
    • H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
    • H01P5/181—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being hollow waveguides
    • H01P5/182—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being hollow waveguides the waveguides being arranged in parallel

Definitions

  • the present invention relates to microwave couplers with waveguides.
  • the microwave emission sources delivering often high powers the most suitable means of propagation is then the waveguide.
  • these waveguides do not allow sufficient frequency bandwidth, in particular for modern electromagnetic detection systems.
  • the prior art uses waveguides provided with one or more steps. These steps consist of conductive bars fixed to the interior walls of the waveguide, at determined locations, and in electrical contact with the walls of this waveguide. Depending on the number, the shape, and the position of these steps in the waveguide, the frequency bandwidth is increased more or less.
  • the most commonly used type of these modified waveguides has two steps of parallelepiped shape and which are fixed on the interior walls of the waveguide, so as to be parallel to the axis of symmetry of the waveguide and so that the longitudinal plane of symmetry and parallel to the short side of the cross section of this waveguide is also a longitudinal plane of symmetry for each of these steps.
  • Microwave couplers using this type of guide wave wave made from two wave guides with two steps, parallel to each other and having a wall comprising a step common to these two wave guides. Holes of determined diameter are then made in the common wall so as to establish coupling. The number of these holes and their diameter depends on the desired coupling rate as well as the impedance matching conditions which are imposed by the system.
  • the present invention aims to remedy this drawback by defining a microwave coupler with two waveguides, each using at least one step, and whose coupling characteristics are at least equal to the coupler of the hole type of the prior art but whose size is very small.
  • the hyper-frequency coupler with two parallel waveguides and having a common wall is characterized in that this common wall is pierced with slots parallel to a cross section of these two guides d 'wave.
  • the width of the slots 31 and 35 is equal to 0.86; the width of the slots 32 and 34 is equal to 1.38; the width of the slot 33 is equal to 1.62.
  • microwave coupler described above is only one example of an embodiment suitable for waveguides with two steps.
  • the ohmic terminations and the waveguide-coaxial line coupler can be replaced by other types of terminations adapted to the operation of the device in which the microwave coupler is mounted.
  • the waveguides used have a particular structure, and in particular when the section of these waveguides comprises more than two steps, it is necessary to adapt the shape of the sections of waveguides 2 and 5 as well as the transitions 4 and 6 so as not to have, in the part of the microwave coupler corresponding to the conductive plate 7, steps in contact with this conductive plate 7 pierced with slots. For this, it may be necessary to reduce and then delete certain steps respectively in the transitions 4 and 6 and in the sections of waveguides 2 and 5, as is the case for the step 30 in the particular example of the figure.

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Abstract

1. A microwave coupler comprising two parallel wave guides (2, 5) having a common conducting wall (7) the thickness of which is approximately lambda go/4, lambda go constituting the guided wavelenght corresponding to the center of the desired frequency band, this wall being provided with slots (31, 32, 33, 34, 35) extending parallelly to the crocc-section of the two wave guides (2, 5), characterized in that, the wave guides to which the coupler is connected having two ribs, the two wave guides (2, 5) of the coupler comprise each a rib (10, 15) extending parallelly to the direction of propagation in the wave guide, each rib (10, 15) being attached to that wave guide wall which is parallel to the common wall (7), this common wall being without rib.

Description

La présente invention concerne des coupleurs hyperfréquences à guides d'onde.The present invention relates to microwave couplers with waveguides.

Dans la plupart des dispositifs hyperfréquences, il est nécessaire de pouvoir prélever une partie déterminée du signal élaboré, afin de mesurer les différents paramètres définissant ce signal hyperfréquence et, éventuellement, de les corriger en fonction des conditions d'utilisation. Cette opération est réalisée à l'aide de dispositifs connus sous le nom de coupleurs, qui prélèvent un pourcentage déterminé de la puissance véhiculée, par exemple dans. un guide d'onde ou par une ligne du type microstrip.In most microwave devices, it is necessary to be able to take a determined part of the signal generated, in order to measure the various parameters defining this microwave signal and, possibly, to correct them according to the conditions of use. This operation is carried out using devices known as couplers, which take a determined percentage of the power conveyed, for example in. a waveguide or by a line of the microstrip type.

Les sources d'émission hyperfréquence délivrant des puissances souvent élevées, le moyen de propagation le plus adapté est alors le guide d'onde. Cependant, ces guides d'onde ne permettent pas une bande passante en fréquence suffisante, notamment pour les .systèmes modernes de détection électromagnétique. Pour remédier à cet inconvénient de l'étroitesse de bande passante en fréquence pour un mode de propagation donné, l'art antérieur utilise des guides d'ondes munis d'un ou de plusieurs redans. Ces redans consistent en des barres conductrices fixées sur les parois intérieures du guide d'onde, à des endroits déterminés, et en contact électrique avec les parois de ce guide d'onde. En fonction du nombre, de la forme, et de la position de ces redans dans le guide d'onde, la bande passante en fréquence se trouve augmentée plus ou moins. Le type le plus couramment utilisé de ces guides d'onde modifiés, possède deux redans de forme parallélépipédique et qui sont fixés sur les parois intérieures du guide d'onde, de façon à être parallèles à l'axe de symétrie du guide d'onde et de façon à ce que le plan de symétrie longitudinal et parallèle au petit côté de la section droite de ce guide d'onde, soit également un plan de symétrie longitudinal pour chacun de ces redans.The microwave emission sources delivering often high powers, the most suitable means of propagation is then the waveguide. However, these waveguides do not allow sufficient frequency bandwidth, in particular for modern electromagnetic detection systems. To overcome this drawback of the narrowness of frequency bandwidth for a given propagation mode, the prior art uses waveguides provided with one or more steps. These steps consist of conductive bars fixed to the interior walls of the waveguide, at determined locations, and in electrical contact with the walls of this waveguide. Depending on the number, the shape, and the position of these steps in the waveguide, the frequency bandwidth is increased more or less. The most commonly used type of these modified waveguides, has two steps of parallelepiped shape and which are fixed on the interior walls of the waveguide, so as to be parallel to the axis of symmetry of the waveguide and so that the longitudinal plane of symmetry and parallel to the short side of the cross section of this waveguide is also a longitudinal plane of symmetry for each of these steps.

Les coupleurs hyperfréquences utilisant ce type de guide d'onde à redans, sont selon l'art antérieur, réalisés à partir de deux guides d'onde à deux redans, parallèles l'un à l'autre et ayant une paroi comprenant un redan commune à ces deux guides d'onde. Des trous de diamètre déterminé sont alors pratiqués dans la paroi commune de façon à établir le couplage. Le nombre de ces trous et leur diamètre dépend du taux de couplage désiré ainsi que des conditions d'adaptation d'impédance qui sont imposées par le système.Microwave couplers using this type of guide wave wave, according to the prior art, made from two wave guides with two steps, parallel to each other and having a wall comprising a step common to these two wave guides. Holes of determined diameter are then made in the common wall so as to establish coupling. The number of these holes and their diameter depends on the desired coupling rate as well as the impedance matching conditions which are imposed by the system.

L'inconvénient principal de ces coupleurs est leur encombrement. Pour un taux de couplage de 10 db, il est courant d'obtenir des longueurs excédant 30 cm, ce qui peut interdire leur emploi dans des dispositifs de petite dimension comme par exemple les têtes de missiles.The main drawback of these couplers is their size. For a coupling rate of 10 db, it is common to obtain lengths exceeding 30 cm, which may prohibit their use in small devices such as for example missile heads.

La présente invention vise à remédier à cet inconvénient en définissant un coupleur hyperfréquence à deux guides d'onde, utilisant au moins chacun un redan, et dont les caractéristiques de couplage sont au moins égales au coupleur du type à trous de l'art antérieur mais dont l'encombrement est très réduit.The present invention aims to remedy this drawback by defining a microwave coupler with two waveguides, each using at least one step, and whose coupling characteristics are at least equal to the coupler of the hole type of the prior art but whose size is very small.

Selon une caractéristique de l'invention, le coupleur hyper-- fréquence à deux guides d'onde parallèles et possédant une paroi commune, est caractérisé par le fait que cette paroi commune est percée de fentes parallèles à une section droite de ces deux guides d'onde.According to a characteristic of the invention, the hyper-frequency coupler with two parallel waveguides and having a common wall, is characterized in that this common wall is pierced with slots parallel to a cross section of these two guides d 'wave.

D'autres avantages et caractéristiques de l'invention apparaîtront dans la description qui suit, illustrée à l'aide de l'unique figure qui représente un exemple de réalisation d'un coupleur hyperfréquence à deux guides d'onde selon l'invention.Other advantages and characteristics of the invention will appear in the description which follows, illustrated with the aid of the single figure which represents an embodiment of a microwave coupler with two waveguides according to the invention.

L'art antérieur connaît des coupleurs hyperfréquences à guides d'onde de petite dimension ; ceux-ci sont réalisés à l'aide de guides d'onde classiques à section rectangulaire sans redans, et sont connus sous l'appellation anglo-saxonne "branch line". Le couplage, dans ce type de coupleur, est assuré par des tronçons de guides d'onde montés orthogonalement aux deux guides d'onde dont on désire effectuer le couplage. Leur inconvénient majeur est une limitation de la bande passante en fréquence, du fait précisément de l'utilisation de ces tronçons de guides d'onde sans redans comme éléments de couplage.The prior art knows microwave couplers with small waveguides; these are produced using conventional waveguides with rectangular section without steps, and are known by the Anglo-Saxon name "branch line". Coupling, in this type of coupler, is ensured by sections of waveguides mounted orthogonally to the two waveguides whose coupling is desired. Their major drawback is a limitation frequency bandwidth, precisely because of the use of these waveguide sections without steps as coupling elements.

Ce préjugé technique de la limitation de la bande passante en fréquence du au guide d'onde sans redans comme élément de couplage, est surmonté dans le coupleur selon l'invention. En effet, celui-ci utilise comme éléments de couplage des fentes, dont la forme est rectangulaire dans le mode de réalisation optimal selon l'invention. Celles-ci sont donc assimilables à des tronçons de guides d'onde sans redans. Des expérimentations ont montré que l'utilisation d'un tel moyen de couplage permet d'obtenir des résultats souvent meilleurs que ceux obtenus avec des coupleurs hyperfréquences du type à trous de l'art antérieur, notamment en ce qui concerne la largeur de la bande passante en fréquence, tout en nécessitant un encombrement très réduit par rapport à ces derniers.This technical prejudice of limiting the frequency bandwidth due to the waveguide without steps as a coupling element, is overcome in the coupler according to the invention. Indeed, it uses as coupling elements slots, whose shape is rectangular in the optimal embodiment according to the invention. These can therefore be compared to sections of waveguides without steps. Experiments have shown that the use of such a coupling means makes it possible to obtain results which are often better than those obtained with microwave couplers of the hole type of the prior art, in particular as regards the width of the strip. frequency bandwidth, while requiring a very small footprint compared to the latter.

La figure montre un exemple préférentiel de réalisation d'un coupleur hyperfréquence selon l'invention, adapté à des guides d'onde à deux redans. Il comporte le coupleur proprement dit, constitué de deux guides d'onde 2 et 5 à un redan 10 et 15, et d'une plaque conductrice 7 percée de fentes 31, 32, 33, 34, 35, cette plaque servant de paroi commune sans redans aux deux guides d'onde 2 et 5 à un redan. Sur la voie directe de ce coupleur, sont connectées deux transitions 4 et 6 permettant de passer d'un guide d'onde à deux redans 12 à un guide d'onde à un seul redan 5. Pour ce faire, le long de chacune de ces transitions 4 et 6, l'un des redans 30 est progressivement supprimé alors que l'autre 13 est agrandi de façon à obtenir le profil souhaité pour le guide d'onde 5 à un redan 15. Sur la: voie couplée, le guide d'onde 2 à un redan 10 est relié d'une part à une terminaison ohmique 1 et d'autre part à une transition 3 du type guide d'onde ligne coaxiale 11 ; cette terminaison ohmique et cette transition guide d'onde ligne coaxiale sont toutes deux bien connues de l'homme de l'art. A titre d'exemple, la terminaison ohmique peut être constituée par un tronçon de guide d'onde à un redan 8 dans lequel un matériau diélectrique absorbant les ondes hyperfréquences 9 est placé. Ce matériau diélectrique 9 pourra être taillé en forme de coin d'une largeur égale à celle du redan 8, de façon à ce qu'il soit en contact avec ce redan 8 et la paroi du guide d'onde à l'extrémité de la terminaison ohmique 1, comme le montre la figure. La plaque métallique 7 assurant le couplage, doit être telle que son épaisseur et l'intervalle entre deux fentes consécutives sont voisines de Àgo/4, ou λgo est la longueur d'onde guidée correspondant au centre de la bande de fréquences désirée. Ces fentes de largeur différente sont également disposées symétriquement par rapport au centre de la plaque 7. Dans l'exemple décrit ici, 5 fentes ont été suffisantes pour obtenir des résultats au moins comparables avec les coupleurs à trous de l'art antérieur. Dans le cas d'un coupleur ayant un taux de couplage de 10 db et une bande passante en fréquence de 5300 Mhz à 10600 Mhz ; les cotes des deux guides d'onde à un redan 2 et 5 ainsi que de la paroi commune 7 percée de fentes 31 à 35 dans cet exemple particulier, sont données ci-dessous en millimètres :

  • a = 20 ; b = 28 ; c=9,1; i=58; j = 20; k = 15;
  • l=8,4; m=4; n=13; o=20; p=20; q=58; s=36,8.
The figure shows a preferred embodiment of a microwave coupler according to the invention, suitable for waveguides with two steps. It comprises the coupler proper, consisting of two waveguides 2 and 5 to a step 10 and 15, and a conductive plate 7 pierced with slots 31, 32, 33, 34, 35, this plate serving as a common wall without steps to the two waveguides 2 and 5 to a step. On the direct channel of this coupler, two transitions 4 and 6 are connected, making it possible to pass from a wave guide with two steps 12 to a wave guide with a single step 5. To do this, along each of these transitions 4 and 6, one of the steps 30 is gradually removed while the other 13 is enlarged so as to obtain the desired profile for the wave guide 5 to a step 15. On the: coupled channel, the guide wave 2 to a step 10 is connected on the one hand to an ohmic termination 1 and on the other hand to a transition 3 of the coaxial line waveguide type 11; this ohmic termination and this coaxial line waveguide transition are both well known to those skilled in the art. By way of example, the ohmic termination can be constituted by a waveguide section with a step 8 in which an absorbing dielectric material the microwave 9 is placed. This dielectric material 9 can be cut into a wedge shape with a width equal to that of the step 8, so that it is in contact with this step 8 and the wall of the waveguide at the end of the ohmic termination 1, as shown in the figure. The metal plate 7 ensuring the coupling, must be such that its thickness and the interval between two consecutive slits are close to Àgo / 4, or λgo is the guided wavelength corresponding to the center of the desired frequency band. These slots of different width are also arranged symmetrically with respect to the center of the plate 7. In the example described here, 5 slots were sufficient to obtain results at least comparable with the hole couplers of the prior art. In the case of a coupler having a coupling rate of 10 db and a frequency bandwidth of 5300 Mhz to 10600 Mhz; the dimensions of the two waveguides with a step 2 and 5 as well as of the common wall 7 pierced with slots 31 to 35 in this particular example, are given below in millimeters:
  • a = 20; b = 28; c = 9.1; i = 58; j = 20; k = 15;
  • l = 8.4; m = 4; n = 13; o = 20; p = 20; q = 58; s = 36.8.

La largeur des fentes 31 et 35 est égale à 0,86 ; la largeur des fentes 32 et 34 est égale à 1,38 ; la largeur de la fente 33 est égale à 1,62.The width of the slots 31 and 35 is equal to 0.86; the width of the slots 32 and 34 is equal to 1.38; the width of the slot 33 is equal to 1.62.

Le coupleur hyperfréquence décrit précédemment ne constitue qu'un exemple de réalisation adapté à des guides d'onde à deux redans. De même les terminaisons ohmiques et le coupleur guide d'onde-ligne coaxiale, peuvent être remplacés par d'autres types de terminaisons adaptés au fonctionnement du dispositif dans lequel le coupleur hyperfréquence est monté.The microwave coupler described above is only one example of an embodiment suitable for waveguides with two steps. Similarly, the ohmic terminations and the waveguide-coaxial line coupler can be replaced by other types of terminations adapted to the operation of the device in which the microwave coupler is mounted.

Dans le cas où les guides d'onde utilisés possèdent une structure particulière, et notamment lorsque la section de ces guides d'onde comporte plus de deux redans, il faut adapter la forme des tronçons de guides d'onde 2 et 5 ainsi que les transitions 4 et 6 de façon à ne pas avoir, dans la partie du coupleur hyperfréquence correspondant à la plaque conductrice 7, de redans en contact avec cette plaque conductrice 7 percée de fentes. Pour cela, on peut être amenés à réduire puis à supprimer certains redans respectivement dans les transitions 4 et 6 et dans les tronçons de guides d'onde 2 et 5, comme cela est le cas pour le redan 30 dans l'exemple particulier de la figure.In the case where the waveguides used have a particular structure, and in particular when the section of these waveguides comprises more than two steps, it is necessary to adapt the shape of the sections of waveguides 2 and 5 as well as the transitions 4 and 6 so as not to have, in the part of the microwave coupler corresponding to the conductive plate 7, steps in contact with this conductive plate 7 pierced with slots. For this, it may be necessary to reduce and then delete certain steps respectively in the transitions 4 and 6 and in the sections of waveguides 2 and 5, as is the case for the step 30 in the particular example of the figure.

La détermination pratique des différentes dimensions du coupleur hyperfréquence, et notamment la largeur des fentes 31, 32, 33 et 34 de la plaque conductrice 7 de couplage, pour chaque cas particulier est effectuée à partir des calculs développés dans l'article de William J. GETSINGER, IRE Transactions on Microwave Theory and Technics, 1962 page 41 et suivantes, et dans l'article de John REED, IRE Transactions on Microwave Theory and Technics, 1958 page 398 et suivantes.The practical determination of the different dimensions of the microwave coupler, and in particular the width of the slots 31, 32, 33 and 34 of the conductive coupling plate 7, for each particular case is carried out from the calculations developed in the article by William J. GETSINGER, IRE Transactions on Microwave Theory and Technics, 1962 page 41 et seq. And in the article by John REED, IRE Transactions on Microwave Theory and Technics, 1958 page 398 et seq.

On a ainsi décrit un coupleur hyperfréquence à large bande passante en fréquence et de faible dimension.A microwave coupler with a large frequency passband and of small size has thus been described.

Claims (9)

1. Coupleur hyperfréquence à guide d'onde possédant au moins un redan, et comportant deux guides d'onde (2, 5) parallèles, ces deux guides d'onde (2, 5) possédant une paroi commune conductrice (7), caractérisé en ce que cette paroi commune conductrice (7) a une épaisseur voisine de Ago/4, où λgo est la longueur d'onde guidée correspondant au centre de la bande de fréquence désirée, et est percée de fentes (31, 32, 33, 34, 35) parallèles à la section droite de ces deux guides d'onde (2, 5).1. Microwave coupler with waveguide having at least one step, and comprising two parallel waveguides (2, 5), these two waveguides (2, 5) having a common conductive wall (7), characterized in that this common conductive wall (7) has a thickness close to Ago / 4, where λgo is the guided wavelength corresponding to the center of the desired frequency band, and is pierced with slots (31, 32, 33, 34, 35) parallel to the cross section of these two waveguides (2, 5). 2. Coupleur hyperfréquence selon la revendication 1, caractérisé en ce que les fentes (31, 32, 33, 34, 35) pratiquées dans ladite plaque conductrice (7) sont éloignées les unes des autres d'une distance voisine de λ go/4.2. Microwave coupler according to claim 1, characterized in that the slots (31, 32, 33, 34, 35) formed in said conductive plate (7) are distant from each other by a distance close to λ go / 4 . 3. Coupleur hyperfréquence selon l'une des revendications 1 ou2, caractérisé en ce que la plaque conductrice (7) comportant les fentes (31, 32, 33, 34, 35) est symétrique par rapport à un axe passant par le centre de cette plaque conductrice (7) et orthogonale aux surfaces comportant ces fentes.3. Microwave coupler according to one of claims 1 or 2, characterized in that the conductive plate (7) comprising the slots (31, 32, 33, 34, 35) is symmetrical with respect to an axis passing through the center of this conductive plate (7) and orthogonal to the surfaces comprising these slots. 4. Coupleur hyperfréquence selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la plaque conductrice (7) ne comporte pas de redan.4. Microwave coupler according to any one of claims 1 to 3, characterized in that the conductive plate (7) does not include a step. 5. Coupleur hyperfréquence selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les guides d'onde auxquels sont raccordés le coupleur possèdent deux redans, les deux guides d'onde (2, 5) du coupleur comportent chacun un redan (10, 15) parallèle à la direction de propagation dans le guide d'onde, chacun de ces redans (10, 15) étant fixé sur la paroi de chacun de ces deux guides d'onde (2, 5) qui est parallèle à la paroi commune (7), percée des fentes (31, 32, 33, 34, 35), et partageant cette paroi en deux parties égales.5. Microwave coupler according to any one of claims 1 to 4, characterized in that the waveguides to which the coupler are connected have two steps, the two waveguides (2, 5) of the coupler each have a step (10, 15) parallel to the direction of propagation in the waveguide, each of these steps (10, 15) being fixed on the wall of each of these two waveguides (2, 5) which is parallel to the common wall (7), pierced with the slots (31, 32, 33, 34, 35), and dividing this wall into two equal parts. 6. Coupleur hyperfréquence selon la revendication 1, caractérisé en ce qu'il comporte des moyens de transition (3, 4, 6) fixés sur les sections des guides d'onde (2, 5) du coupleur hyperfréquence, ces transitions étant constituées de façon à supprimer les redans se trouvant dans le plan de la plaque conductrice du couplage (7).6. Microwave coupler according to claim 1, characterized in that it comprises transition means (3, 4, 6) fixed on the sections of the waveguides (2, 5) of the microwave coupler, these transitions being made up of way to remove the steps located in the plane of the conductive plate of the coupling (7). 7. Coupleur hyperfréquence selon les revendications 5 et 6, caractérisé en ce que les moyens de transition (4, 6) permettent de passer un guide d'onde à un redan à un guide d'onde à deux redans.7. Microwave coupler according to claims 5 and 6, characterized in that the transition means (4, 6) make it possible to pass from a wave guide to a step to a wave guide to two steps. 8. Coupleur hyperfréquence selon la revendication 6, caractérisé en ce que l'une des transitions au moins est du type guide d'onde-ligne coaxiale.8. Microwave coupler according to claim 6, characterized in that at least one of the transitions is of the waveguide-coaxial line type. 9. Coupleur hyperfréquence selon la revendication 1, caractérisé en ce qu'il comporte au moins une terminaison ohmique (1) fermant une extrémité de l'un des deux guides d'onde (2, 5) du coupleur hyperfréquence.9. Microwave coupler according to claim 1, characterized in that it comprises at least one ohmic termination (1) closing one end of one of the two waveguides (2, 5) of the microwave coupler.
EP19810400789 1980-06-10 1981-05-19 Microwave waveguide-coupler Expired EP0041877B1 (en)

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Application Number Priority Date Filing Date Title
FR8012864A FR2484154A1 (en) 1980-06-10 1980-06-10 HYPERFREQUENCY COUPLER WITH WAVEGUIDE
FR8012864 1980-06-10

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EP0041877A1 true EP0041877A1 (en) 1981-12-16
EP0041877B1 EP0041877B1 (en) 1984-07-18

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Cited By (5)

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GB2206454A (en) * 1987-06-29 1989-01-05 Gen Electric Waveguide directional coupler with multiple coupled outputs
GB2233831A (en) * 1989-07-15 1991-01-16 British Aerospace Waveguide coupling networks
GB2237692A (en) * 1989-11-02 1991-05-08 British Aerospace Waveguide networks
US5105170A (en) * 1989-07-15 1992-04-14 British Aerospace Public Limited Company Waveguide coupling networks
US5456813A (en) * 1993-01-26 1995-10-10 Societe Anonyme: Saft Method of joining a metal connection tab to an electro-chemical cell electrode having a foam-type support, and an electrode obtained by the method

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Cited By (9)

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Publication number Priority date Publication date Assignee Title
GB2206454A (en) * 1987-06-29 1989-01-05 Gen Electric Waveguide directional coupler with multiple coupled outputs
FR2617646A1 (en) * 1987-06-29 1989-01-06 Gen Electric DIRECTIONAL COUPLER OF WAVEGUIDES WITH MULTIPLE COUPLED OUTPUTS
GB2206454B (en) * 1987-06-29 1991-12-04 Gen Electric Waveguide directional coupler with multiple coupled outputs
GB2233831A (en) * 1989-07-15 1991-01-16 British Aerospace Waveguide coupling networks
US5105170A (en) * 1989-07-15 1992-04-14 British Aerospace Public Limited Company Waveguide coupling networks
GB2233831B (en) * 1989-07-15 1994-03-23 British Aerospace Shared power amplifiers
GB2237692A (en) * 1989-11-02 1991-05-08 British Aerospace Waveguide networks
GB2237692B (en) * 1989-11-02 1994-02-09 British Aerospace Waveguide networks
US5456813A (en) * 1993-01-26 1995-10-10 Societe Anonyme: Saft Method of joining a metal connection tab to an electro-chemical cell electrode having a foam-type support, and an electrode obtained by the method

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EP0041877B1 (en) 1984-07-18
FR2484154A1 (en) 1981-12-11
DE3164867D1 (en) 1984-08-23
FR2484154B1 (en) 1984-11-30

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