EP0022401B1 - Broad-band polariser with low ellipticity-ratio and microwave equipment with the same - Google Patents
Broad-band polariser with low ellipticity-ratio and microwave equipment with the same Download PDFInfo
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- EP0022401B1 EP0022401B1 EP80400970A EP80400970A EP0022401B1 EP 0022401 B1 EP0022401 B1 EP 0022401B1 EP 80400970 A EP80400970 A EP 80400970A EP 80400970 A EP80400970 A EP 80400970A EP 0022401 B1 EP0022401 B1 EP 0022401B1
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- waveguide
- polarizer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/165—Auxiliary devices for rotating the plane of polarisation
- H01P1/17—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation
- H01P1/171—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation using a corrugated or ridged waveguide section
Definitions
- the present invention relates to a broadband polarizer with a low ellipticality rate, produced in a circular waveguide.
- Such polarizers which make it possible to transform rectilinear polarization into circular polarization and vice versa. They produce for this, thanks to electromagnetic paths traveled at different phase speeds, a phase difference between the two components of the field. If the two components have the same amplitude and the phase difference produced is the rectilinear polarization is transformed into circular polarization which is said to be "right” or “left” depending on whether, looking in the direction of propagation, the direction of rotation of the field vector follows or does not follow the direction of clockwise .
- phase of the field component which is parallel to the dielectric plate varies from (Ad: wavelength of the wave considered in the dielectric) in the guide section of length L which includes the dielectric plate; in this same section the phase of the field component which is orthogonal to the dielectric plate varies from ( ⁇ g: wavelength in the guide). The difference gives the phase delay of the component parallel to the dielectric plate with respect to the component orthogonal to the dielectric plate.
- the object of the present invention is to reduce and even, to a large extent, to avoid the aforementioned drawbacks.
- a polarizer produced in a circular waveguide of longitudinal axis XX is characterized in that this waveguide has internal grooves and in that these grooves, hollowed out in the wall of the guide, are located in planes perpendicular to the axis XX and have a first and a second depth value respectively inside a first and a second pair of dihedrons at right angles, opposite by the edge, the edge of these dihedrons being constituted by the axis XX and the dihedrons of one pair being opposed by the edge and adjacent to the dihedrons of the other pair.
- Figure 1a shows, in a schematic view in longitudinal section, a polarizer having a longitudinal axis of symmetry XX.
- This polarizer comprises a circular waveguide with grooves, 1, (groove: corrugation in Anglo-Saxon literature) and a progressive coupling 2.
- the progressive coupling 2 comprises a cylindrical waveguide, 20, connected to the grooved waveguide, 1, by a waveguide in the form of a truncated cone, 21.
- the grooved waveguide has 34 identical grooves. This guide has only been partially represented and 11 of the 34 grooves, such as groove 10, appear in FIG. 1 a.
- FIG. 1b is a schematic view in transverse section at the height of the groove 10, of the waveguide with grooves, 1.
- Each of the 34 identical grooves of the waveguide 1 is hollowed out over 360 ° inside the guide and is perpendicular to the axis XX.
- the depth of the grooves is not constant; if we consider two pairs of dihedrons at right angles, opposite by the edge and whose edge is formed by the axis XX, the depth of a groove is less in one of the pairs of dihedrons (quadrants 11 and 13-figure 1b) than in the other pair of dihedrons (quadrants 12 and 14-figure 1b).
- the depths of each groove are 23.1 and 35.6 mm; the internal diameter of the grooved guide, grooves not included, is 86.4 mm.
- Figure 2 is a partial sectional view of the grooved waveguide according to Figures 1a and 1b. The cut was made by a plane passing through the axis XX ( Figure 1a) and cutting the quadrant 13 ( Figure 1b).
- This figure shows the grooves, such as groove 10, the outer wall 15 of the groove guide and the walls, such as wall 16, between the grooves; in the embodiment described the thickness of the wall between the grooves is 0.5 mm and the width of the grooves is 10 mm.
- Figure 3 is a view of a section of the grooved guide, 1, cut along two planes perpendicular to the axis XX and one of which passes inside the groove 10. This figure allows to see the interior of the groove 10, with its shallow parts 11, 13 and its deep parts 12.14.
- the polarizer is arranged in such a way that the incident field, E ( Figures 1 and 3) is parallel to one of the two planes which mark the transition between the two different depths of grooves.
- C 1 and C 2 being the two orthogonal components of the field E (FIGS. 1 b and 3)
- the phase speed of the component C, in the guide with grooves 1 depends on the admittance of the quadrants 11 and 13, while the phase speed of the component C 2 depends on the admittance of the quadrants 12, 14.
- the difference in the depths causes a difference in these admittances and therefore a difference between the phase speeds of the components C 1 and C 2 of the field during the passage through the grooved guide of the polarizer.
- the depths have been chosen so that the influence of the grooves on the phase speed of the components C 1 and C 2 is reversed in the bands of the 4 GHz (3.7-4.2 GHz) and 6 GHz (5.925-6.425 GHz); that is, in the 4 GHz band, the normalized groove susceptibility is very low (between 0.730 and 2.20) for quadrants 11, 13 and very large (between 9.50 and 96.3) for quadrants 12, 14; on the other hand, in the 6 GHz band, the normalized susceptibility is very large (between 17.5 and 126) for quadrants 11, 13 and very low (between-2.41 and 0.167) for quadrants 12, 14.
- phase shift between the components C 1 and C 2 is identical in the 4 GHz band to that in the 6 GHz band.
- FIG. 4 is a graph which shows the values of the ellipticity rate T e (or, which amounts to the same thing, of the phase shift ⁇ between the components C 1 and C 2 of the field) obtained, as a function of the indicated working frequency on the abscissa, with the polarizer described above.
- this polarizer makes it possible to pass from rectilinear polarization into circular polarization with an ellipticity rate which does not exceed 0.67 dB in the 4 GHz band and which does not exceed 0.75 dB in the band 6 GHz.
- FIGS. 1 a and 1 b are schematic views, respectively in longitudinal section and in cross section, of another polarizer according to the invention.
- This polarizer differs from the polarizer according to FIGS. 1 a and 1 b by the fact that a waveguide, 3, in which a dielectric plate, 4 is arranged, is placed in series with the grooved guide 1 to which it is fixed.
- the waveguide 3 is a circular guide with a smooth internal wall.
- the dielectric plate 4 is placed at 45 ° and the grooved guide 1 is placed as in figure 1b.
- the polarizer according to FIGS. 5a and 5b can therefore be considered as the association of a portion of a conventional polarizer (circular waveguide 3 with, inside, a dielectric plate placed at 45 ° relative to the field) with a portion of a polarizer consisting of a circular waveguide with grooves of variable depth.
- the phase shifts introduced by the dielectric plate and by the grooves are added and are provided to give a total phase shift as close as possible to 90 ° in the frequency band or bands of use of the polarizer.
- a polarizer according to Figures 5a and 5b has been studied for the 4 and 6 GHz bands.
- the dielectric plate brings a certain average phase shift in the 4 GHz band and another average phase shift in the 6 GHz band and these two phase shifts are different from 90 °;
- the grooved guide; 1, is determined so that the number, the depths and the width of the grooves bring the average total phase shift of the polarizer to the nearest 90 ° in each of the two frequency bands.
- FIGS. 6a and 6b are schematic views, respectively in longitudinal section and in cross section, of another example of a polarizer according to the invention.
- This polarizer is mainly distinguished from the polarizer according to FIGS. 5a and 5b by the absence of the smooth guide 3 and by the introduction of a dielectric plate, 4, inside a grooved guide. Again the total phase shift introduced by the polarizer is produced on the one hand by the dielectric plate 4 and on the other hand by the grooves of the waveguide 1. With the absence of a smooth waveguide, everything what has been said above on the polarizer according to FIGS. 5a and 5b applies to the polarizer according to FIGS. 6a and 6b.
- the polarizers which have been described as well as those which can be imagined without departing from the scope of the invention find more particularly their application in the field of radar, in the antennas of earth stations and the antennas mounted in satellites . More generally, the polarizers according to the invention can be used in equipment whenever a polarizer bringing a low ellipticity rate and having a high power handling is necessary.
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Description
La présente invention se rapporte à un polariseur à large bande et faible taux d'ellip- ticité, réalisé dans un guide d'ondes circulaire.The present invention relates to a broadband polarizer with a low ellipticality rate, produced in a circular waveguide.
De tels polariseurs sont connus qui permettent de transformer la polarisation rectiligne en polarisation circulaire et vice versa. Ils produisent pour cela, grâce à des chemins électro-magnétiques parcourus à des vitesses de phase différentes, une différence de phase entre les deux composantes du champ. Si les deux composantes ont la même amplitude et que la différence de phase produite est de
Ces polariseurs connus comportent un guide d'ondes circulaire auquel sont associés une ou plusieurs plaques en diélectrique, de longueur L, disposées à 45° par rapport au vecteur champ linéaire incident. La phase de la composant du champ qui est parallèle à la plaque en diélectrique varie de
Certaines variantes connues de ces polariseurs remplacent les plaques en diélectrique par des alignements longitudinaux de bâtonnets ou associent plaques et alignements de bâtonnets, les plaques et les bâtonnets étant alors à 90° les uns des autres sur les parois du guide.Certain known variants of these polarizers replace the dielectric plates with longitudinal alignments of rods or combine plates and alignments of rods, the plates and the rods then being at 90 ° from each other on the walls of the guide.
De tels polariseurs connus sont décrits dans le brevet US 4 100 514.Such known polarizers are described in US Pat. No. 4,100,514.
Ces polariseurs connus présentent deux inconvénients principaux: ils sont peu aptes à travailler à puissance élevée, ils entraînent des pertes non négligeables.These known polarizers have two main drawbacks: they are not very capable of working at high power, they cause significant losses.
Il est également connu, par les brevets US-A-3 668 567, et GB-A-1365484 de réaliser un polariseur dans lequel des iris disposés à l'intérieur et selon l'axe principal d'un guide d'ondes, modifient la vitesse de propagation d'une polarisation par rapport à une autre. Ces polariseurs n'ont pas toujours une largeur de bande suffisante pour répondre aux besoins des utilisateurs et amènent, du fait des perturbations apportées par les iris, un taux d'ellipticité et des pertes non négligeables.It is also known from patents US-A-3,668,567 and GB-A-1365484 to produce a polarizer in which irises arranged inside and along the main axis of a waveguide, modify the propagation speed of one polarization compared to another. These polarizers do not always have a sufficient bandwidth to meet the needs of users and lead, due to the disturbances provided by the irises, to a significant ellipticity rate and losses.
Le but de la présente invention est de réduire et même, dans une large mesure, d'éviter les inconvénients précités.The object of the present invention is to reduce and even, to a large extent, to avoid the aforementioned drawbacks.
Ceci est obtenu, en particulier, par l'utilisation d'un guide d'ondes présentant des rainures internes (corrugations dans la littérature anglo-saxonne).This is obtained, in particular, by the use of a waveguide having internal grooves (corrugations in the Anglo-Saxon literature).
. Selon l'invention., un polariseur réalisé dans un guide d'ondes circulaires d'axe longitudinal XX est caractérisé en ce que ce guide d'ondes comporte des rainures internes et en ce que ces rainures, creusées dans la paroi du guide, sont situées dans des plans perpendiculaires à l'axe XX et ont une première et une seconde valeur de profondeur respectivement à l'intérieur d'une première et d'une seconde paire de dièdres à angle droit, opposés par l'arête, l'arête de ces dièdres étant constituée par l'axe XX et les dièdres d'une paire étant opposés par l'arête et adjacents aux dièdres de l'autre paire.. According to the invention, a polarizer produced in a circular waveguide of longitudinal axis XX is characterized in that this waveguide has internal grooves and in that these grooves, hollowed out in the wall of the guide, are located in planes perpendicular to the axis XX and have a first and a second depth value respectively inside a first and a second pair of dihedrons at right angles, opposite by the edge, the edge of these dihedrons being constituted by the axis XX and the dihedrons of one pair being opposed by the edge and adjacent to the dihedrons of the other pair.
La présente invention sera mieux comprise et d'autres caractéristiques apparaîtront à l'aide de la description ci-après et des figures s'y rapportant qui représentent:
- -les figures 1 a et 1 b deux vues d'un premier polariseur selon l'invention;
- - les figures 2 et 3 des vues partielles, détaillées du polariseur selon les figures 1 a et 1 b;
- - la figure 4 un graphique relatif au polariseur selon les figures 1 a et 1 b;
- - les figures 5a et 5b des vues d'un deuxième polariseur selon l'invention;
- - les figures 6a et 6b des vues d'un troisième polariseur selon l'invention.
- FIGS. 1 a and 1 b two views of a first polarizer according to the invention;
- - Figures 2 and 3 partial views, detailed of the polarizer according to Figures 1 a and 1 b;
- - Figure 4 a graph relating to the polarizer according to Figures 1 a and 1 b;
- - Figures 5a and 5b views of a second polarizer according to the invention;
- - Figures 6a and 6b views of a third polarizer according to the invention.
Sur les différentes figures, les éléments correspondants sont désignés par les mêmes repères.In the various figures, the corresponding elements are designated by the same references.
La figure 1 a montre, dans une vue schématique en coupe longitudinale, un polariseur présentant un axe longitudinal de symétrie XX. Ce polariseur comporte un guide d'ondes circulaire à rainures, 1, (rainure: cor- rugation dans la littérature anglo-saxonne) et un raccord progressif 2. Le raccord progressif 2 comporte un guide d'ondes cylindrique, 20, relié au guide d'ondes à rainures, 1, par un guide d'ondes en forme de tronc de cône, 21.Figure 1a shows, in a schematic view in longitudinal section, a polarizer having a longitudinal axis of symmetry XX. This polarizer comprises a circular waveguide with grooves, 1, (groove: corrugation in Anglo-Saxon literature) and a
Le guide d'ondes à rainures comporte 34 rainures identiques. Ce guide n'a été que partiellement représenté et 11 des 34 rainures, telle que la rainure 10, apparaissent sur la figure 1 a.The grooved waveguide has 34 identical grooves. This guide has only been partially represented and 11 of the 34 grooves, such as
La figure 1 b est une vue schématique en coupe transversale à la hauteur de la rainure 10, du guide d'ondes à rainures, 1.FIG. 1b is a schematic view in transverse section at the height of the
Chacune des 34 rainures identiques du guide d'ondes 1 est creusée sur 360° à l'intérieur du guide et est perpendiculaire à l'axe XX. La profondeur des rainures n'est pas constante; si l'on considère deux paires de dièdres à angle droit, opposés par l'arête et dont l'arête est constituée par l'axe XX, la profondeur d'une rainure est moins grande dans l'une des paires de dièdres (quadrants 11 et 13-figure 1b) que dans l'autre paire de dièdres (quadrants 12 et 14-figure 1b). Dans la réalisation qui a servi d'exemple les profondeurs de chaque rainure sont de 23,1 et 35,6 mm; quant au diamètre interne du guide à rainures, rainures non comprises, il est de 86,4 mm.Each of the 34 identical grooves of the waveguide 1 is hollowed out over 360 ° inside the guide and is perpendicular to the axis XX. The depth of the grooves is not constant; if we consider two pairs of dihedrons at right angles, opposite by the edge and whose edge is formed by the axis XX, the depth of a groove is less in one of the pairs of dihedrons (
La figure 2 est une vue partielle en coupe du guide d'ondes à rainures selon les figures 1 a et 1 b. La coupe a été réalisée par un plan passant par l'axe XX (figure 1a) et coupant le quadrant 13 (figure 1 b). Cette figure montre les rainures, telle la rainure 10, la paroi extérieure 15 du guide à rainure et les parois, telle la paroi 16, entre les rainures; dans l'exemple de réalisation décrit l'épaisseur de la paroi entre les rainures est de 0,5 mm et la largeur des rainures est de 10 mm.Figure 2 is a partial sectional view of the grooved waveguide according to Figures 1a and 1b. The cut was made by a plane passing through the axis XX (Figure 1a) and cutting the quadrant 13 (Figure 1b). This figure shows the grooves, such as
La figure 3 est une vue d'un tronçon du guide à rainures, 1, coupé selon deux plans perpendiculaires à l'axe XX et dont l'un passe à l'intérieur de la rainure 10. Cette figure permet de voir l'intérieur de la rainure 10, avec ses parties peu profondes 11, 13 et ses parties profondes 12,14.Figure 3 is a view of a section of the grooved guide, 1, cut along two planes perpendicular to the axis XX and one of which passes inside the
Le polariseur qui vient d'être décrit à l'aide des figures 1a, 1b, 2 et 3 fonctionne comme indiqué ci-après.The polarizer which has just been described with the aid of FIGS. 1a, 1b, 2 and 3 operates as indicated below.
Le polariseur est disposé de telle manière que le champ incident, E (figures 1 et 3) soit parallèle à l'un des deux plans qui marquent la transition entre les deux profondeurs différentes de rainures. C1 et C2 étant les deux composantes orthogonales du champ E (figures 1 b et 3), la vitesse de phase de la composante C, dans le guide à rainures 1 dépend de l'admittance des quadrants 11 et 13, tandis que la vitesse de phase de la composante C2 dépend de l'admittance des quadrants 12, 14. Or la différence des profondeurs entraîne une différence de ces admittances et donc une différence entre les vitesses de phase des composantes C1 et C2 du champ lors du passage à travers le guide à rainures du polariseur.The polarizer is arranged in such a way that the incident field, E (Figures 1 and 3) is parallel to one of the two planes which mark the transition between the two different depths of grooves. C 1 and C 2 being the two orthogonal components of the field E (FIGS. 1 b and 3), the phase speed of the component C, in the guide with grooves 1 depends on the admittance of the
Dans la réalisation qui est décrite à l'aide des figures 1 à à 3, les profondeurs ont été choisies de telle sorte que l'influence des rainures sur la vitesse de phase des composantes C1 et C2 soit inversée dans les bandes des 4 GHz (3,7-4,2 GHz) et des 6 GHz (5,925-6,425 GHz); c'est-à-dire que, dans la bande des 4 GHz, la suscep- tance normalisée des rainures est très faible (comprise entre 0,730 et 2,20) pour les quadrants 11, 13 et très grande (comprise entre 9,50 et 96,3) pour les quadrants 12, 14; par contre dans la bande des 6 GHz, la suscep- tance normalisée est très grande (comprise entre 17,5 et 126) pour les quadrants 11, 13 et très faible (comprise entre-2,41 et 0,167) pour les quadrants 12, 14.In the embodiment which is described with the aid of FIGS. 1 to 3, the depths have been chosen so that the influence of the grooves on the phase speed of the components C 1 and C 2 is reversed in the bands of the 4 GHz (3.7-4.2 GHz) and 6 GHz (5.925-6.425 GHz); that is, in the 4 GHz band, the normalized groove susceptibility is very low (between 0.730 and 2.20) for
Il est à noter de plus que le déphasage entre les composantes C1 et C2, entrainé par le polariseur selon les figures 1a à 3, est identique dans la bande des 4 GHz à celui dans la bande des 6 GHz.It should also be noted that the phase shift between the components C 1 and C 2 , caused by the polarizer according to FIGS. 1a to 3, is identical in the 4 GHz band to that in the 6 GHz band.
La figure 4 est un graphique qui montre les valeurs du taux d'ellipticité Te (ou, ce qui revient au même, du déphasage Δφ entre les composantes C1 et C2 du champ) obtenu, en fonction de la fréquence de travail indiquée en abscisse, avec le polariseur décrit ci-avant. Comme il ressort de ce graphique, ce polariseur permet de passer de polarisation rectiligne en polarisation circulaire avec un taux d'ellipticité qui ne dépasse pas 0,67 dB dans la bande des 4 GHz et qui ne dépasse pas 0,75 dB dans la bande des 6 GHz.FIG. 4 is a graph which shows the values of the ellipticity rate T e (or, which amounts to the same thing, of the phase shift Δφ between the components C 1 and C 2 of the field) obtained, as a function of the indicated working frequency on the abscissa, with the polarizer described above. As can be seen from this graph, this polarizer makes it possible to pass from rectilinear polarization into circular polarization with an ellipticity rate which does not exceed 0.67 dB in the 4 GHz band and which does not exceed 0.75 dB in the band 6 GHz.
Les figures 5a et 5b sont des vues schématiques, respectivement en coupe longitudinale et en coupe transversale, d'un autre polariseur selon l'invention. Ce polariseur se distingue du polariseur selon les figures 1 a et 1 b par le fait qu'un guide d'ondes, 3, dans lequel est disposée une plaque en diélectrique, 4, est placé en série avec le guide à rainures 1 auquel il est fixé. Le guide d'ondes 3 est une guide circulaire à paroi interne lisse.Figures 5a and 5b are schematic views, respectively in longitudinal section and in cross section, of another polarizer according to the invention. This polarizer differs from the polarizer according to FIGS. 1 a and 1 b by the fact that a waveguide, 3, in which a dielectric plate, 4 is arranged, is placed in series with the grooved guide 1 to which it is fixed. The waveguide 3 is a circular guide with a smooth internal wall.
Par rapport au champ incident, E, (figure 5b) la plaque en diélectrique 4 est placée à 45° et le guide à rainures 1 est placé comme dans la figure 1b. Le polariseur selon les figures 5a et 5b peut donc être considéré comme l'association d'une portion d'un polariseur classique (guide d'ondes circulaire 3 avec, à l'intérieur, une plaque en diélectrique placée à 45° par rapport au champ) avec une portion d'un polariseur constitué d'un guide d'ondes circulaire à rainures de profondeur variable. Les déphasages introduits par la plaque en diélectrique et par les rainures s'ajoutent et sont prévus pour donner un déphasage total aussi proche que possible de 90° dans la ou les bandes de fréquences d'utilisation du polariseur.With respect to the incident field, E (figure 5b), the dielectric plate 4 is placed at 45 ° and the grooved guide 1 is placed as in figure 1b. The polarizer according to FIGS. 5a and 5b can therefore be considered as the association of a portion of a conventional polarizer (circular waveguide 3 with, inside, a dielectric plate placed at 45 ° relative to the field) with a portion of a polarizer consisting of a circular waveguide with grooves of variable depth. The phase shifts introduced by the dielectric plate and by the grooves are added and are provided to give a total phase shift as close as possible to 90 ° in the frequency band or bands of use of the polarizer.
Il a été étudié un polariseur selon les figures 5a et 5b pour les bandes des 4 et 6 GHz. Dans ce polariseur la plaque en diélectrique amène un certain déphasage moyen dans la bande de 4 GHz et un autre déphasage moyen dans la bande des 6 GHz et ces deux déphasages sont différents de 90°; le guide à rainures; 1, est déterminé pour que le nombre, les profondeurs et la largeur des rainures amènent le déphasage total moyen du polariseur au plus proche de 90° dans chacune des deux bandes de fréquences.A polarizer according to Figures 5a and 5b has been studied for the 4 and 6 GHz bands. In this polarizer the dielectric plate brings a certain average phase shift in the 4 GHz band and another average phase shift in the 6 GHz band and these two phase shifts are different from 90 °; the grooved guide; 1, is determined so that the number, the depths and the width of the grooves bring the average total phase shift of the polarizer to the nearest 90 ° in each of the two frequency bands.
Les figures 6a et 6b sont des vues schématiques, respectivement en coupe longitudinale et en coupe transversale, d'un autre exemple de polariseur selon l'invention. Ce polariseur se distingue principalement du polariseur selon les figures 5a et 5b par l'absence du guide lisse 3 et par l'introduction d'une plaque en diélectrique, 4, à l'intérieur d'un guide à rainures. Là aussi le déphasage total qu'introduit le polariseur est produit d'une part par la plaque en diélectrique 4 et d'autre part par les rainures du guide d'ondes 1. A l'absence de guide d'ondes lisse près, tout ce qui a été dit ci-avant sur le polariseur selon les figures 5a et 5b s'applique au polariseur selon les figures 6a et 6b.Figures 6a and 6b are schematic views, respectively in longitudinal section and in cross section, of another example of a polarizer according to the invention. This polarizer is mainly distinguished from the polarizer according to FIGS. 5a and 5b by the absence of the smooth guide 3 and by the introduction of a dielectric plate, 4, inside a grooved guide. Again the total phase shift introduced by the polarizer is produced on the one hand by the dielectric plate 4 and on the other hand by the grooves of the waveguide 1. With the absence of a smooth waveguide, everything what has been said above on the polarizer according to FIGS. 5a and 5b applies to the polarizer according to FIGS. 6a and 6b.
Il est à noter que les polariseurs qui ont été décrits ainsi que ceux qui peuvent être imaginés sans sortir du cadre de l'invention trouvent plus particulièrement leur application dans le domaine du radar, dans les antennes de stations terriennes et les antennes montées dans les satellites. Plus généralement les polariseurs selon l'invention peuvent être utilisés dans un matériel chaque fois qu'un polariseur amenant un faible taux d'ellipticité et possédant une grande tenue en puissance est nécessaire.It should be noted that the polarizers which have been described as well as those which can be imagined without departing from the scope of the invention find more particularly their application in the field of radar, in the antennas of earth stations and the antennas mounted in satellites . More generally, the polarizers according to the invention can be used in equipment whenever a polarizer bringing a low ellipticity rate and having a high power handling is necessary.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7917847 | 1979-07-10 | ||
| FR7917847A FR2461370A1 (en) | 1979-07-10 | 1979-07-10 | BROADBAND POLARIZER WITH LOW ELLIPTICITY RATES AND MICROWAVE WORK EQUIPMENT COMPRISING SUCH A POLARIZER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0022401A1 EP0022401A1 (en) | 1981-01-14 |
| EP0022401B1 true EP0022401B1 (en) | 1984-09-19 |
Family
ID=9227710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP80400970A Expired EP0022401B1 (en) | 1979-07-10 | 1980-06-27 | Broad-band polariser with low ellipticity-ratio and microwave equipment with the same |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4305051A (en) |
| EP (1) | EP0022401B1 (en) |
| JP (1) | JPS5616301A (en) |
| FR (1) | FR2461370A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4549310A (en) * | 1984-03-29 | 1985-10-22 | Rca Corporation | Cross-polarization corrector for circular waveguide |
| US4672334A (en) * | 1984-09-27 | 1987-06-09 | Andrew Corporation | Dual-band circular polarizer |
| US4725795A (en) * | 1985-08-19 | 1988-02-16 | Hughes Aircraft Co. | Corrugated ridge waveguide phase shifting structure |
| US4906951A (en) * | 1989-02-15 | 1990-03-06 | United States Department Of Energy | Birefringent corrugated waveguide |
| JP3331839B2 (en) * | 1995-11-13 | 2002-10-07 | 松下電器産業株式会社 | Circularly polarized linearly polarized wave converter |
| JP3657484B2 (en) * | 1999-12-10 | 2005-06-08 | 三菱電機株式会社 | Circularly polarized wave generator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1365484A (en) * | 1971-11-10 | 1974-09-04 | Plessey Co Ltd | Waveguide structures |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2986713A (en) * | 1958-04-29 | 1961-05-30 | Kent Howard | Corrugated flexible wave guide |
| US3668567A (en) * | 1970-07-02 | 1972-06-06 | Hughes Aircraft Co | Dual mode rotary microwave coupler |
| US3857112A (en) * | 1973-11-02 | 1974-12-24 | Gte Sylvania Inc | Broadband quarter-wave plate assembly |
| US4100514A (en) * | 1977-04-28 | 1978-07-11 | Gte Sylvania Incorporated | Broadband microwave polarizer device |
| EP0014099A1 (en) * | 1979-01-26 | 1980-08-06 | ERA Technology Limited | Circular polariser |
-
1979
- 1979-07-10 FR FR7917847A patent/FR2461370A1/en active Granted
-
1980
- 1980-06-27 EP EP80400970A patent/EP0022401B1/en not_active Expired
- 1980-07-07 US US06/166,682 patent/US4305051A/en not_active Expired - Lifetime
- 1980-07-07 JP JP9257080A patent/JPS5616301A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1365484A (en) * | 1971-11-10 | 1974-09-04 | Plessey Co Ltd | Waveguide structures |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5616301A (en) | 1981-02-17 |
| FR2461370A1 (en) | 1981-01-30 |
| US4305051A (en) | 1981-12-08 |
| EP0022401A1 (en) | 1981-01-14 |
| FR2461370B1 (en) | 1983-08-19 |
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