EP0343585B1 - Microwave multiplex filter - Google Patents

Microwave multiplex filter Download PDF

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Publication number
EP0343585B1
EP0343585B1 EP89109232A EP89109232A EP0343585B1 EP 0343585 B1 EP0343585 B1 EP 0343585B1 EP 89109232 A EP89109232 A EP 89109232A EP 89109232 A EP89109232 A EP 89109232A EP 0343585 B1 EP0343585 B1 EP 0343585B1
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EP
European Patent Office
Prior art keywords
filter
common
filters
antennas
unitary
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EP89109232A
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German (de)
French (fr)
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EP0343585A1 (en
Inventor
Catherine Simon
Robert Le Roux
Marc Sauvage
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Alcatel CIT SA
Alcatel Lucent NV
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Alcatel Telspace SA
Alcatel NV
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Publication of EP0343585A1 publication Critical patent/EP0343585A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/04—Coupling devices of the waveguide type with variable factor of coupling
    • 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

Definitions

  • the invention relates to microwave multiplexed connection filters and therefore comprising a common access to several unit bandpass filters and as many independent accesses as there are unit filters, such a connection filter serving as a demultiplexer when a microwave signal is applied to its common access, the demultiplexed signals then being obtained on the independent accesses which form the outputs of each of the unit filters, and serving on the contrary as a multiplexer when the various microwave signals to be multiplexed are respectively applied to each of these independent accesses relating to each unit filter and that the multiplexed signal output is then obtained on said common access.
  • a connection filter serving as a demultiplexer when a microwave signal is applied to its common access, the demultiplexed signals then being obtained on the independent accesses which form the outputs of each of the unit filters, and serving on the contrary as a multiplexer when the various microwave signals to be multiplexed are respectively applied to each of these independent accesses relating to each unit filter and that the multiplexed signal output is then obtained on
  • Microwave multiplexed connection filters are produced in "comb-line” (comb filter) or in evanescent mode. These filters are tunable in a certain frequency band and have at least one common coaxial access. These are attached or in-line filters, each operating in a different frequency band.
  • a filter of the known art is described in the article published in IEEE MTT Vol. 21 N ° 1 January 1973 entitled "Design of evanescent mode waveguide diplexers”.
  • This article describes a new procedure for making connection filters constructed in waveguides below the cutoff.
  • This realization allows the total construction of a diplexer (the whole device is built in a single waveguide, which allows to do without T-junction and connection flanges) if a coaxial connection is used at the common junction .
  • the embodiment described uses unitary bandpass filters valid for bandwidths of a few percent.
  • the agreement of the two unit filters is not independent and there is interaction of a unit filter on the other.
  • the filter tuning bands must be very close to each other because there is a resonator common to both filters.
  • the width of this strip cannot exceed a few percent.
  • the diplexer is necessarily made up of two unitary filters in line.
  • An object of the invention is to make the unit filters independent of each other, that is to say such that, during the adjustment, there is no interaction of one on the 'other, which simplifies this setting.
  • Document DE-A-3,028,925 describes a diplexed connection filter, which more precisely is here an antenna splitter, and which comprises two unit filters joined by a common wall and each provided with their independent coaxial access. Their common access is placed in the extension of this common wall, and it is electrically connected to two respective coupling antennas which are provided in the internal space of each of the unit filters, on either side of this common wall and largely away from it.
  • the adjustment of each unit filter is carried out by agreement of the resonators that each filter contains. However, no possibility of adjustment by the coupling members is provided at the access points.
  • the document EP-A-0.205.151 describes a unitary microwave bandpass filter in evanescent mode, the two coaxial accesses of which respectively enter and exit the filter, are each equipped with a rotary coupling antenna in the form of a crankshaft. , which allows, by rotation of one or the other of these coupling antennas in the form of a crankshaft about their longitudinal axis, to adjust the coupling between this antenna and this unit filter.
  • This document does not however relate to a multiplexed connection filter with several unit filters, and gives no solution for applying this principle of adjustment, by rotary crankshaft coupling antenna, to such a multiplexed connection filter.
  • Such an embodiment of the filter of the invention is simple and more efficient than the devices of the known art.
  • the unitary filters can be produced in line or side by side:
  • the invention can in particular be applied to two in-line filters, to two side by side filters, to three "triplexer” filters or to four "quadriplexer” filters.
  • the invention relates more precisely to this common access 14 which makes it possible to produce a filter comprising two unitary filters joined together, as shown in FIG. 1, but which also makes it possible to produce a filter comprising three or four unitary filters joined together as shown respectively in the Figures 2 and 3, or two in-line unit filters as shown in Figure 4.
  • the common access shown in Figures 5 and 6 is located on horseback between the two unit filters 10 and 11.
  • the partition 28 at this location has been partially milled so as to allow the passage of the antennas 22 and 23.
  • the "plug" part 48 is also modified: its diameter is increased in order to allow passage to the antennas which must be more curved to be sufficiently distant from each other.
  • this part is now attached to the filter by at least two screws 49 and 50.
  • the coaxial base 53 is itself fixed to the "plug" part by at least two screws 51, 52 as shown in FIG. 7.
  • the filter is made of one-piece extruded aluminum, of square shape. It is possible to give it other forms: rectangular or circular (only in the case of an online diplexer) and to make it in several parts, with cover.
  • the two independent accesses can be made directly as a guide.
  • the "plug" part in the examples shown is either wedged in the guide by the base (figure 5) or held by two screws in the guide (figure 7) but it is also possible to screw it into the wall of the guide by threading and directly tapping the guide.
  • the common part 39 is identical to that of the "quadriplexer”; but we only use three crankshaft antennas, one hole remaining unused. It is also possible to machine only three holes in the common room.

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Description

L'invention se rapporte à des filtres de branchement multiplexés en hyperfréquence et comportant donc un accès commun à plusieurs filtres passe-bande unitaires et autant d'accès indépendants qu'il y a de filtres unitaires, un tel filtre de branchement servant de démultiplexeur lorsqu'un signal hyperfréquence est appliqué sur son accès commun, les signaux démultiplexés étant alors obtenus sur les accès indépendants qui forment les sorties de chacun des filtres unitaires, et servant à contrario de multiplexeur lorsque les divers signaux hyperfréquence à multiplexer sont respectivement appliqués sur chacun de ces accès indépendants relatifs à chaque filtre unitaire et que la sortie de signal multiplexée est alors obtenue sur ledit accès commun.The invention relates to microwave multiplexed connection filters and therefore comprising a common access to several unit bandpass filters and as many independent accesses as there are unit filters, such a connection filter serving as a demultiplexer when a microwave signal is applied to its common access, the demultiplexed signals then being obtained on the independent accesses which form the outputs of each of the unit filters, and serving on the contrary as a multiplexer when the various microwave signals to be multiplexed are respectively applied to each of these independent accesses relating to each unit filter and that the multiplexed signal output is then obtained on said common access.

Des filtres de branchement multiplexés hyperfréquence sont réalisés en "comb-line" (filtre en peigne) ou en mode évanescent. Ces filtres sont accordables dans une certaine bande de fréquence et possèdent au moins un accès coaxial commun. Ce sont des filtres accolés ou en ligne, chacun fonctionnant dans une bande de fréquence différente.Microwave multiplexed connection filters are produced in "comb-line" (comb filter) or in evanescent mode. These filters are tunable in a certain frequency band and have at least one common coaxial access. These are attached or in-line filters, each operating in a different frequency band.

Un filtre de l'art connu est décrit dans l'article paru dans IEEE MTT Vol. 21 N°1 Janvier 1973 intitulé "Design of evanescent mode waveguide diplexeurs". Cet article décrit une nouvelle procédure de réalisation de filtres de branchement construits en guides d'onde en dessous de la coupure. Cette réalisation permet la construction totale d'un diplexeur (le dispositif entier est construit en un seul guide d'onde, ce qui permet de se passer de jonction en T et de brides de connection) si une liaison coaxiale est utilisée à la jonction commune. La réalisation décrite utilise des filtres passe-bande unitaires valables pour des largeurs de bande de quelques pourcent.A filter of the known art is described in the article published in IEEE MTT Vol. 21 N ° 1 January 1973 entitled "Design of evanescent mode waveguide diplexers". This article describes a new procedure for making connection filters constructed in waveguides below the cutoff. This realization allows the total construction of a diplexer (the whole device is built in a single waveguide, which allows to do without T-junction and connection flanges) if a coaxial connection is used at the common junction . The embodiment described uses unitary bandpass filters valid for bandwidths of a few percent.

Avec ce type de diplexeur, l'accord des deux filtres unitaires n'est pas indépendant et il y a interaction d'un filtre unitaire sur l'autre. Les bandes d'accord des filtres doivent être forcément très proches l'une de l'autre car il y a un résonateur commun aux deux filtres. De plus la largeur de cette bande ne peut excéder quelques pourcent. De plus dans ce cas le diplexeur est forcément constitué de deux filtres unitaires en ligne.With this type of diplexer, the agreement of the two unit filters is not independent and there is interaction of a unit filter on the other. The filter tuning bands must be very close to each other because there is a resonator common to both filters. In addition, the width of this strip cannot exceed a few percent. Furthermore in this case the diplexer is necessarily made up of two unitary filters in line.

Un objet de l'invention est de rendre les filtres unitaires indépendants l'un de l'autre, c'est-à-dire tels que, lors du réglage, il n'y ait pas d'interaction de l'un sur l'autre, ce qui permet de simplifier ce réglage.An object of the invention is to make the unit filters independent of each other, that is to say such that, during the adjustment, there is no interaction of one on the 'other, which simplifies this setting.

Le document DE-A-3.028.925 décrit un filtre de branchement diplexé, qui plus précisément est ici un répartiteur d'antenne, et qui comporte deux filtres unitaires accolés par une paroi commune et munis chacun de leur accès coaxial indépendant. Leur accès commun est placé dans le prolongement de cette paroi commune, et il est relié électriquement à deux antennes de couplage respectives qui sont prévues dans l'espace interne de chacun des filtres unitaires, de part et d'autre de cette paroi commune et largement à distance de cette dernière. Le réglage de chaque filtre unitaire s'effectue par accord des résonateurs que chaque filtre contient. En revanche, aucune possibilité de réglage par les organes de couplage n'est prévue aux accès.Document DE-A-3,028,925 describes a diplexed connection filter, which more precisely is here an antenna splitter, and which comprises two unit filters joined by a common wall and each provided with their independent coaxial access. Their common access is placed in the extension of this common wall, and it is electrically connected to two respective coupling antennas which are provided in the internal space of each of the unit filters, on either side of this common wall and largely away from it. The adjustment of each unit filter is carried out by agreement of the resonators that each filter contains. However, no possibility of adjustment by the coupling members is provided at the access points.

Le document EP-A-0.205.151 décrit un filtre unitaire passe-bande hyperfréquences en mode évanescent dont les deux accès coaxiaux, respectivement d'entrée et de sortie du filtre, sont équipés chacun d'une antenne de couplage rotative en forme de vilebrequin, ce qui permet, par rotation de l'une ou l'autre de ces antennes de couplage en forme de vilebrequin autour de leur axe longitudinal, de régler le couplage entre cette antenne et ce filtre unitaire. Ce document ne concerne cependant pas un filtre de branchement multiplexé à plusieurs filtres unitaires, et ne donne aucune solution pour appliquer ce principe de réglage, par antenne de couplage vilebrequin rotative, à un tel filtre de branchement multiplexé.The document EP-A-0.205.151 describes a unitary microwave bandpass filter in evanescent mode, the two coaxial accesses of which respectively enter and exit the filter, are each equipped with a rotary coupling antenna in the form of a crankshaft. , which allows, by rotation of one or the other of these coupling antennas in the form of a crankshaft about their longitudinal axis, to adjust the coupling between this antenna and this unit filter. This document does not however relate to a multiplexed connection filter with several unit filters, and gives no solution for applying this principle of adjustment, by rotary crankshaft coupling antenna, to such a multiplexed connection filter.

Afin de réaliser l'objet, l'invention propose à cet effet à un filtre de branchement multiplexé en hyperfréquence, ce filtre de branchement possédant un premier accès d'entrée ou de sortie qui est commun à plusieurs filtres de branchement unitaires, accolés et/ou en ligne, et plusieurs accès indépendants, de sortie ou d'entrée, dont un accès indépendant par filtre unitaire, cet accès commun étant placé dans le prolongement d'une paroi de séparation, réelle ou fictive, commune à tous ces filtres unitaires, et étant relié électriquement à autant d'antennes de couplages respectives qu'il y a de filtres unitaires, ce filtre de branchement multiplexé étant caractérisé en ce que :

  • . lesdites antennes de couplage sont des antennes de couplage en forme de vilebrequin qui sont mobiles en rotation autour de leur axe longitudinal pour permettre le réglage du couplage entre cette antenne et le filtre unitaire concerné ;
  • . les axes longitudinaux de toutes ces antennes de couplage sont situés à cheval entre ces différents filtres unitaires et ont une de leur extrémité qui est portée, de manière respectivement rotative, par une pièce commune qui, étant en matière électriquement conductrice, sert également à relier électriquement l'embase dudit accès commun à chacune de ces antennes de couplage, cette pièce commune étant axée dans le plan de ladite paroi de séparation.
In order to achieve the object, the invention proposes for this purpose a multiplexed hyperfrequency branching filter, this branching filter having a first input or output port which is common to several unitary branching filters, joined and / or online, and several accesses independent, output or input, including independent access by unit filter, this common access being placed in the extension of a partition wall, real or fictitious, common to all these unit filters, and being electrically connected to as many '' respective coupling antennas that there are unit filters, this multiplexed connection filter being characterized in that:
  • . said coupling antennas are crankshaft coupling antennas which are movable in rotation about their longitudinal axis to allow adjustment of the coupling between this antenna and the unit filter concerned;
  • . the longitudinal axes of all these coupling antennas are located astride these different unit filters and have one of their ends which is carried, respectively in a rotary manner, by a common part which, being made of electrically conductive material, also serves to electrically connect the base of said access common to each of these coupling antennas, this common part being oriented in the plane of said partition wall.

Avantageusement il n'y a pas de limite d'espacement entre les fréquences d'accord des deux filtres élémentaires et ces filtres peuvent être large bande ou bande étroite.Advantageously, there is no spacing limit between the tuning frequencies of the two elementary filters and these filters can be wide band or narrow band.

Dans un exemple de réalisation, l'accès commun est composé :

  • d'une embase coaxiale
  • d'une première pièce "bouchon" en métal qui permet de reboucher le guide après montage des deux antennes en vilebrequin, cette pièce s'insérant dans un évidement de la paroi commune aux deux filtres de manière à être coincée par l'embase coaxiale,
  • d'une pièce commune qui a pour but de relier électriquement l' embase coaxiale aux antennes, cette pièce commune présentant une extrémité rétrécie destinée à venir s'insérer étroitement dans l'embase coaxiale,
  • d'un tube isolant destiné au passage de la pièce commune afin d'éviter un court-circuit entre la pièce commune et la pièce "bouchon",
  • de deux antennes de couplage en forme de vilebrequin dont les extrémités rétrécies vont s'insérer étroitement dans des trous de la pièce commune de manière à permettre la rotation de ces antennes, les autres extrémités sortant du filtre par un trou situé dans le même axe que les extrémités rétrécies,
  • de vis de blocage en rotation de chaque antenne, chacune traversant le corps du filtre jusqu'à venir s'appuyer sur l'antenne correspondante.
In an exemplary embodiment, the common access is composed:
  • a coaxial base
  • a first metal "plug" part which allows the guide to be recapped after mounting the two crankshaft antennas, this part fitting into a recess in the wall common to the two filters so as to be wedged by the coaxial base,
  • a common part which aims to electrically connect the coaxial base to the antennas, this common part having a narrowed end intended to be inserted tightly in the coaxial base,
  • an insulating tube intended for the passage of the common part in order to avoid a short circuit between the common part and the "plug" part,
  • two crankshaft coupling antennas whose narrowed ends will fit tightly into holes in the common part so as to allow the rotation of these antennas, the other ends leaving the filter through a hole in the same axis as the narrowed ends,
  • of locking screws in rotation of each antenna, each passing through the filter body until it comes to rest on the corresponding antenna.

Une telle réalisation du filtre de l'invention est simple et plus performante que les dispositifs de l'art connu.Such an embodiment of the filter of the invention is simple and more efficient than the devices of the known art.

Les filtres unitaires peuvent être réalisés en ligne ou accolés : En effet l'invention peut s'appliquer notamment à deux filtres en ligne, à deux filtres accolés, a trois filtres "triplexeur" ou à quatre filtres "quadriplexeur".The unitary filters can be produced in line or side by side: The invention can in particular be applied to two in-line filters, to two side by side filters, to three "triplexer" filters or to four "quadriplexer" filters.

Avantageusement, dans le procédé de réglage de tels filtres

  • on bloque l' antenne de tous les filtres moins un, ce qui permet de régler ce dernier filtre dont l'antenne n'est pas bloquée,
  • lorsque ce réglage est réalisé, on bloque l'antenne de ce filtre,
  • ensuite on débloque l'antenne correspondant à un autre filtre, et on règle ce filtre puis on rebloque ladite antenne,
  • on effectue ainsi le réglage successif de tous les filtres élémentaires.
Advantageously, in the method of adjusting such filters
  • the antenna of all the filters minus one is blocked, which makes it possible to adjust this last filter whose antenna is not blocked,
  • when this adjustment is made, the antenna of this filter is blocked,
  • then we unlock the antenna corresponding to another filter, and we set this filter and then re-block said antenna,
  • the successive adjustment of all the elementary filters is thus carried out.

Les caractéristiques et avantages de l'invention ressortiront d'ailleurs de la description qui va suivre, à titre d'exemple non limitatif, en référence aux figures annexées sur lesquelles :

  • les figures 1 à 4 illustrent schématiquement différents types de filtres selon l'invention ;
  • la figure 5 illustre une vue en coupe transversale d'un filtre selon l'invention ;
  • la figure 6 illustre une vue en coupe longitudinale selon le plan VI-VI du filtre de l'invention représenté à la figure 5 ;
  • la figure 7 illustre une vue partielle en coupe transversale d'un filtre selon l'invention ;
  • la figure 8 illustre une vue partielle en coupe longitudinale selon le plan VIII-VIII du filtre représenté à la figure 7.
The characteristics and advantages of the invention will become apparent from the description which follows, by way of nonlimiting example, with reference to the appended figures in which:
  • Figures 1 to 4 schematically illustrate different types of filters according to the invention;
  • FIG. 5 illustrates a cross-sectional view of a filter according to the invention;
  • Figure 6 illustrates a longitudinal sectional view along the plane VI-VI of the filter of the invention shown in Figure 5;
  • FIG. 7 illustrates a partial view in cross section of a filter according to the invention;
  • FIG. 8 illustrates a partial view in longitudinal section along plane VIII-VIII of the filter shown in FIG. 7.

Le filtre de l'invention, représenté à la figure 1 comprend :

  • deux filtres unitaires 10 et 11 accolés en technologie "combline" (filtre en peigne) ou évanescent dont le nombre de pôles n'est pas limité (l'exemple représenté ici concerne deux filtres à trois pôles) ;
  • deux accès indépendants (accès 12) équipés chacun d'une antenne de couplage, en forme de vilebrequin, mobile en rotation autour de son axe pour permettre le réglage du couplage entre l'antenne et le filtre. (Une telle antenne est décrite dans la demande de brevet EP-A-0.205.151);
  • un accès commun 14 où on utilise de façon différente une antenne de même type;
  • des vis 13 de réglage de l'accord du filtre.
The filter of the invention, represented in FIG. 1 comprises:
  • two unit filters 10 and 11 joined in "combline" (comb filter) or evanescent technology, the number of poles of which is not limited (the example shown here relates to two three-pole filters);
  • two independent accesses (access 12) each equipped with a coupling antenna, in the form of a crankshaft, movable in rotation about its axis to allow adjustment of the coupling between the antenna and the filter. (Such an antenna is described in patent application EP-A-0.205.151);
  • a common access 14 where a different type of antenna is used;
  • screws 13 for tuning the filter.

L'invention porte plus précisément sur cet accès commun 14 qui permet de réaliser un filtre comprenant deux filtres unitaires accolés, comme représenté à la figure 1, mais qui permet aussi de réaliser un filtre comprenant trois ou quatre filtres unitaires accolés comme représenté respectivement sur les figures 2 et 3, ou deux filtres unitaires en ligne comme représenté-sur la figure 4.The invention relates more precisely to this common access 14 which makes it possible to produce a filter comprising two unitary filters joined together, as shown in FIG. 1, but which also makes it possible to produce a filter comprising three or four unitary filters joined together as shown respectively in the Figures 2 and 3, or two in-line unit filters as shown in Figure 4.

L'accès commun représenté aux figures 5 et 6 se situe à cheval entre les deux filtres unitaires 10 et 11. La cloison 28 à cet endroit a été fraisée en partie de manière à laisser le passage des antennes 22 et 23.The common access shown in Figures 5 and 6 is located on horseback between the two unit filters 10 and 11. The partition 28 at this location has been partially milled so as to allow the passage of the antennas 22 and 23.

Cet accès commun 14 est composé :

  • d'une embase coaxiale 20 (par exemple de type démontable) ;
  • d'une première pièce "bouchon" 21 en métal qui permet de reboucher le guide après montage des deux antennes en vilebrequin 22 et 23, cette pièce 21 s'insérant dans un évidement de la paroi commune aux deux filtres de manière à être coincée par l'embase coaxiale ;
  • d'une pièce commune 24 qui a pour but de relier électriquement l'embase coaxiale 20 aux antennes 22 et 23. Cette pièce 24 présente une extrémité rétrécie 25 destinée à venir s'insérer étroitement dans l'embase coaxiale ; La partie centrale 26 de cette pièce 24 étant de longueur égale à la longueur d'un tube isolant 29, décrit ci-après, et supérieure à la longueur de la pièce "bouchon" 21, afin qu'il n'y ait pas contact entre la pièce commune et la pièce "bouchon" ; L'autre extrémité 27 de cette pièce, de diamètre supérieur à celui de la partie centrale 26 mais inférieur au diamètre de la pièce "bouchon" 21, étant percée de deux trous diamétralement opposés 30 et 31 destinés à recevoir les extrémités rétrécies des deux antennes 22 et 23 ;
  • d'un tube isolant 29, par exemple en polytétrafluoréthylène (PTFE), destiné au passage de la pièce commune 24 afin d'éviter un court-circuit entre la pièce commune 24 et la pièce "bouchon" 21 ; Les diamètres de la pièce commune 24 et du tube isolant 29 étant calculés de manière à être adaptés sur 50 Ohms ;
  • de deux antennes de couplage 22 et 23, en forme de vilebrequin, dont les extrémités rétrécies vont s'insérer étroitement dans les trous 27 et 28 de la pièce commune 24 permettant ainsi la rotation de ces antennes, les autres extrémités sortant du filtre par un trou 35 situé dans le même axe que les extrémités rétrécies ; Le pliage de ces antennes étant tel que chaque ensemble antenne plus pièce commune se trouve coincé dans le guide ;
  • d'écrous 32 et 33 soudés respectivement sur l'autre extrémité de chaque antenne (22, 23), cette extrémité étant extérieure au guide, afin de faciliter la rotation de chaque antenne lors du réglage ;
  • de vis de blocage (34) en rotation de chaque antenne qui traversent le corps du filtre jusqu'à venir s'appuyer sur l'antenne correspondante (32).
This common access 14 is made up of:
  • a coaxial base 20 (for example of the removable type);
  • a first metal "plug" part 21 which allows the guide to be recapped after mounting the two crankshaft antennas 22 and 23, this part 21 fitting into a recess in the wall common to the two filters so as to be wedged by the coaxial base;
  • a common part 24 which aims to electrically connect the coaxial base 20 to the antennas 22 and 23. This part 24 has a narrowed end 25 intended to be inserted tightly in the coaxial base; The central part 26 of this part 24 being of length equal to the length of an insulating tube 29, described below, and greater than the length of the "plug" part 21, so that there is no contact between the common room and the "plug"room; The other end 27 of this part, with a diameter greater than that of the central part 26 but less than the diameter of the "plug" part 21, being pierced with two diametrically opposite holes 30 and 31 intended to receive the narrowed ends of the two antennas 22 and 23;
  • an insulating tube 29, for example made of polytetrafluoroethylene (PTFE), intended for the passage of the common part 24 in order to avoid a short circuit between the common part 24 and the "plug" part 21; The diameters of the common part 24 and of the insulating tube 29 being calculated so as to be adapted to 50 Ohms;
  • two coupling antennas 22 and 23, in the form of a crankshaft, the narrowed ends of which are inserted tightly into the holes 27 and 28 of the common part 24 thus allowing the rotation of these antennas, the other ends leaving the filter by a hole 35 located in the same axis as the narrowed ends; The folding of these antennas being such that each antenna assembly plus common part is stuck in the guide;
  • nuts 32 and 33 welded respectively to the other end of each antenna (22, 23), this end being outside the guide, in order to facilitate the rotation of each antenna during adjustment;
  • locking screw (34) in rotation of each antenna which pass through the filter body until it comes to rest on the corresponding antenna (32).

Le réglage du filtre selon l'invention est aisé ; en effet :

  • on bloque une antenne, celle (22) du premier filtre unitaire 12 par exemple, avec la vis de blocage 34 correspondante, ce qui permet de maintenir en position la pièce commune 24 et de régler le second filtre unitaire 13 dont l'antenne 23 n'est pas bloquée, le réglage de ce filtre étant réalisé, on bloque l'antenne 23 de ce filtre 13 à l'aide de la vis de blocage correspondante,
  • ensuite on débloque la première antenne 22, on règle le premier filtre 12 puis on rebloque ladite antenne 22.
The adjustment of the filter according to the invention is easy; indeed :
  • an antenna is blocked, that (22) of the first unitary filter 12 for example, with the corresponding locking screw 34, which makes it possible to hold the common part 24 in position and to adjust the second unitary filter 13 including the antenna 23 n is not blocked, the adjustment of this filter being carried out, the antenna 23 of this filter 13 is blocked using the corresponding blocking screw,
  • then the first antenna 22 is released, the first filter 12 is adjusted and the said antenna 22 is re-enabled.

On utilise le même principe pour le filtre en ligne, représenté en figure 4, dont l'accès commun se trouve au milieu du guide.The same principle is used for the online filter, represented in FIG. 4, the common access of which is located in the middle of the guide.

Dans le cas d'un "triplexeur" et d'un "quadriplexeur", l'accès commun se trouve à cheval comme représenté aux figures 2 et 3 et la pièce commune est modifiée comme représenté sur les figures 7 et 8. La partie 39 la plus large de cette pièce est percée de quatre trous 40, 41, 42, 43 espacés de 90 degrés recevant les extrémités rétrécies de quatre antennes vilebrequin 44, 45, 46 et 47.In the case of a "triplexer" and a "quadriplexer", the common access is on horseback as shown in Figures 2 and 3 and the common part is modified as shown in Figures 7 and 8. Part 39 the widest of this part is pierced with four holes 40, 41, 42, 43 spaced 90 degrees receiving the narrowed ends of four crankshaft antennas 44, 45, 46 and 47.

La pièce "bouchon" 48 est elle aussi modifiée : son diamètre est augmenté afin de laisser le passage aux antennes qui doivent être plus courbées pour être suffisamment éloignées les unes des autres. De plus cette pièce est maintenant fixée au filtre par au moins deux vis 49 et 50.The "plug" part 48 is also modified: its diameter is increased in order to allow passage to the antennas which must be more curved to be sufficiently distant from each other. In addition, this part is now attached to the filter by at least two screws 49 and 50.

L' embase coaxiale 53 est elle-même fixée sur la pièce "bouchon" par au moins deux vis 51, 52 comme représenté à la figure 7.The coaxial base 53 is itself fixed to the "plug" part by at least two screws 51, 52 as shown in FIG. 7.

Le réglage d'un tel filtre s'effectue de manière analogue à celui décrit précédemment, à savoir :

  • on bloque l'antenne de tous les filtres unitaires moins un, ce qui permet de régler le dernier filtre unitaire dont l'antenne n'est pas bloquée,
  • lorsque ce réglage est réalisé on bloque cette antenne,
  • on débloque l'antenne correspondant à un autre filtre unitaire, et on règle ce filtre puis on rebloque ladite antenne,
  • on effectue ainsi le réglage successif de tous les filtres unitaires
The adjustment of such a filter is carried out in a similar manner to that described above, namely:
  • the antenna of all the unit filters minus one is blocked, which makes it possible to adjust the last unit filter whose antenna is not blocked,
  • when this adjustment is made, this antenna is blocked,
  • the antenna corresponding to another unitary filter is released, and this filter is adjusted then the said antenna is re-blocked,
  • the successive adjustment of all the unitary filters is thus carried out

Dans un exemple de réalisation le filtre est réalisé en extrudé d'aluminium monobloc, de forme carrée. Il est possible de lui donner d'autres formes : rectangulaire ou circulaire (uniquement dans le cas d'un diplexeur en ligne) et de le réaliser en plusieurs parties, avec couvercle.In an exemplary embodiment, the filter is made of one-piece extruded aluminum, of square shape. It is possible to give it other forms: rectangular or circular (only in the case of an online diplexer) and to make it in several parts, with cover.

Les deux accès indépendants (coaxiaux dans notre cas) peuvent être réalisés directement en guide.The two independent accesses (coaxial in our case) can be made directly as a guide.

La pièce "bouchon" dans les exemples représentés est soit coincée dans le guide par l'embase (figure 5) soit maintenue par deux vis dans le guide (figure 7) mais il est aussi possible de la visser dans la paroi du guide en la filetant et en taraudant directement le guide.The "plug" part in the examples shown is either wedged in the guide by the base (figure 5) or held by two screws in the guide (figure 7) but it is also possible to screw it into the wall of the guide by threading and directly tapping the guide.

Dans le cas du "triplexeur" la pièce commune 39 est identique à celle du "quadriplexeur"; mais on n'utilise plus que trois antennes vilebrequin, un trou restant inutilisé. Il est aussi possible de n'usiner que trois trous dans la pièce commune.In the case of the "triplexer" the common part 39 is identical to that of the "quadriplexer"; but we only use three crankshaft antennas, one hole remaining unused. It is also possible to machine only three holes in the common room.

Il est bien entendu que la présente invention n'a été décrite et représentée qu'à titre d'exemple préférentiel et que l'on pourra remplacer ses éléments constitutifs par des éléments équivalents sans, pour autant, sortir du cadre de l'invention.It is understood that the present invention has only been described and shown as a preferred example and that its constituent elements can be replaced by equivalent elements without, however, departing from the scope of the invention.

Claims (6)

  1. a multiplexed microwave branching filter, this branching filter having a first common input or output access (14) having a plurality of unitary branching filters (10, 11), joined and/or in line, and a plurality of independent input or output accesses (12), where there is one independent access (12) per unitary filter (10, 11), this common access (14) being situated in the extension of a real or fictitious separating wall which is common to all the unitary filters (10, 11), and being electrically linked to as many respective coupling antennas (22, 23) as there are unitary filters, said multiplexed branching filter being characterized in that:
    · the said coupling antennas (22, 23) are crankshaft-shaped and rotatable about their longitudinal axes in order to adjust coupling between said antenna and the corresponding unitary filter (10, 11);
    · the longitudinal axes of all the coupling antennas are situated astride the various unitary filters (10, 11) and have one end (31, 30) which is carried in a respectively rotatable way, by a common part (24) of a electrically conductive material which is also used to electrically join the base (20) of the said common access (14) to each of the coupling antennas (22, 23), said common part (24) having an axis along the said separating wall.
  2. A filter according to claim 1, characterized in that the common access (14) comprises:
       a coaxial base (20);
       a first "plug" part (21) for closing the waveguide after the two crankshaft-shaped antennas (22 and 23) have been put into place, said part (21) being inserted in a hollow in the wall common to the two filters in such a manner as to be held in place by the coaxial base; and
       a common part (24) for the purpose of electrically connecting the coaxial base (20) to the antennas (22 and 23).
  3. A filter according to claim 2, characterized in that the common part (24) has a small-diameter end (25) for being received at a close fit in the coaxial base.
  4. A filter according to claim 2 or 3, characterized in that the common access includes an insulating tube (29) through which the common part (24) is passed in order to avoid any short circuit between the common part (24) and the "plug" part (21).
  5. A filter according to any one of claims 2 to 4, characterized in that the common access includes at least two crankshaft-shaped coupling antennas (22, 23) whose small-diameter ends are inserted as close fits in the holes (27 and 28) in the common part (24) so as to enable said antennas to rotate, with the other ends thereof projecting outside the filter via respective holes (35) situated on the same axes as the small-diameter ends.
  6. A filter according to any one of claims 1 to 5, characterized in that it includes a screw (34) for preventing each antenna from rotating, said screw passing through the body of the filter and bearing against the corresponding antenna (32).
EP89109232A 1988-05-27 1989-05-23 Microwave multiplex filter Expired - Lifetime EP0343585B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8807108 1988-05-27
FR8807108A FR2632123B1 (en) 1988-05-27 1988-05-27 MULTIPLEX MICROWAVE FILTER, AND METHOD FOR ADJUSTING SUCH A FILTER

Publications (2)

Publication Number Publication Date
EP0343585A1 EP0343585A1 (en) 1989-11-29
EP0343585B1 true EP0343585B1 (en) 1993-12-01

Family

ID=9366696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109232A Expired - Lifetime EP0343585B1 (en) 1988-05-27 1989-05-23 Microwave multiplex filter

Country Status (6)

Country Link
US (1) US4980662A (en)
EP (1) EP0343585B1 (en)
JP (1) JPH0226101A (en)
CA (1) CA1306556C (en)
DE (1) DE68911031T2 (en)
FR (1) FR2632123B1 (en)

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US5151670A (en) * 1991-04-10 1992-09-29 Radio Frequency Systems, Inc. Duplexing filter
US5291158A (en) * 1991-12-26 1994-03-01 Radio Frequency Systems, Inc. High frequency filter having common coupling rods fixedly mounted and coupled through a common wall
JP2581912Y2 (en) * 1992-10-07 1998-09-24 株式会社村田製作所 Duplexer
NZ248549A (en) * 1993-08-31 1997-01-29 Deltec New Zealand Loop coupler for resonator: rotates to adjust loaded q
DE69834370T2 (en) * 1997-08-28 2007-03-15 The Boeing Co., Chicago Clutch mechanism for TE011 and TE01delta mode resonators
US6154106A (en) * 1998-08-27 2000-11-28 Merrimac Industries, Inc. Multilayer dielectric evanescent mode waveguide filter
US6137383A (en) * 1998-08-27 2000-10-24 Merrimac Industries, Inc. Multilayer dielectric evanescent mode waveguide filter utilizing via holes
WO2000026986A1 (en) * 1998-11-02 2000-05-11 Jury Vyacheslavovich Kislyakov Multiplexer
US6426681B1 (en) * 2000-11-28 2002-07-30 Behrouz Amini High power adjustable RF coupling loop
US6559740B1 (en) * 2001-12-18 2003-05-06 Delta Microwave, Inc. Tunable, cross-coupled, bandpass filter
SE530302C2 (en) * 2006-09-14 2008-04-22 Powerwave Technologies Sweden An antenna filter module
JP4491001B2 (en) * 2007-08-31 2010-06-30 日本アンテナ株式会社 filter
TWM343255U (en) * 2008-03-14 2008-10-21 Universal Microwave Technology Inc Antenna terminal feed-in coupling device for duplexer
US8008994B2 (en) * 2009-05-01 2011-08-30 Alcatel Lucent Tunable capacitive input coupling
US9888568B2 (en) 2012-02-08 2018-02-06 Crane Electronics, Inc. Multilayer electronics assembly and method for embedding electrical circuit components within a three dimensional module
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Also Published As

Publication number Publication date
US4980662A (en) 1990-12-25
FR2632123A1 (en) 1989-12-01
FR2632123B1 (en) 1991-01-18
JPH0226101A (en) 1990-01-29
EP0343585A1 (en) 1989-11-29
DE68911031T2 (en) 1994-03-31
DE68911031D1 (en) 1994-01-13
CA1306556C (en) 1992-08-18

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