EP1641071A1 - Space telecommunications integrated antenna system for mobile terrestrial stations (SATCOMS) - Google Patents

Space telecommunications integrated antenna system for mobile terrestrial stations (SATCOMS) Download PDF

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Publication number
EP1641071A1
EP1641071A1 EP05108836A EP05108836A EP1641071A1 EP 1641071 A1 EP1641071 A1 EP 1641071A1 EP 05108836 A EP05108836 A EP 05108836A EP 05108836 A EP05108836 A EP 05108836A EP 1641071 A1 EP1641071 A1 EP 1641071A1
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EP
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Prior art keywords
antenna
axis
rotation
angle
support
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Granted
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EP05108836A
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German (de)
French (fr)
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EP1641071B1 (en
Inventor
Gilles Quagliaro
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Thales SA
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Thales SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
    • H01Q3/08—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons

Definitions

  • the invention relates to an integrated antenna system for space telecommunications for mobile earth stations (Satcom).
  • FIG. 1 shows an example of antennal system usual according to the prior art.
  • the antenna is a motorized parabolic antenna 1, represented here with its main reflector 2 and its source 3.
  • the assembly is protected by a radome 4.
  • FIG. 1 shows the antenna in 3 elevation positions, respectively a horizontal position , a 45 degree position and a vertical position.
  • the internal volume of the radome 4 is mainly occupied by the antenna 1 and its movement. Proportionately, there is therefore little room for equipment associated with the antenna, such as motorization, power amplifier, low noise amplifier, transpositions and all the equipment usually associated with the operation of an antenna. antenna. Some of these equipment is sometimes deported to other compartments of the station, often inconveniently.
  • FIG. 2 shows an antenna performing an electronic scanning in elevation 6 and a mechanical misalignment in bearing 7. With respect to the antenna of FIG. 1, there is no longer any antenna deflection. Comparing Figure 1 and Figure 2, we see that much of the volume initially occupied by the deflection of the antenna is released and therefore available (volume referenced 8 in the figure).
  • the antennal system according to the invention resides on a new approach judiciously using a flat antenna whose antenna beam is fixed but remote from the mechanical axis of the antenna, the latter being also inclined with respect to a main mechanical axis.
  • the invention relates to an integrated antennal system for telecommunications comprising at least one substantially flat and circular antenna equipped with an axis of rotation coinciding with its axis, the antenna being secured to a support comprising itself a rotational axis characterized in that the axis of rotation of the antenna is inclined at an angle ⁇ with respect to the axis of rotation of the antenna support and the antenna beam is at an angle ⁇ with respect to the axis of rotation of the antenna.
  • the diameter of the antenna is for example chosen according to the communication application.
  • the angle ⁇ is for example equal to 45 degrees relative to a second axis of rotation (axis of rotation of the support) substantially vertical, and the angle ⁇ is equal to 45 degrees. The whole thus presents the property by rotation of each of the angles and according to the values taken to cover the half-angle located above the horizontal by the antenna beam.
  • the antennal system according to the invention has the decisive advantage of using a simple fixed beam passive flat antenna whose design can be optimized for the inclination of the retained beam.
  • the radio performance in terms of antenna gain in the beam axis, as well as off-axis radiation in terms of secondary lobes are then optimal and kept constant regardless of the desired score
  • the antenna system according to the invention also has the advantage of being compact and integrated.
  • the rotation along the two axes makes it possible to cover a significant pointing domain.
  • the volume initially required for the movement of the dish is released to leave room for equipment associated with the antenna.
  • the antenna rotates on its own mechanical axis 12, a motor 15 allows this rotation.
  • the antenna is associated with a vertical axis of rotation in the bearing 11 also motorized 16.
  • the other elements associated with the antenna and known to those skilled in the art, are not shown because they do not intervene in the understanding of the 'invention.
  • a rotation of the antenna on its mechanical axis 12 runs the antenna beam 13 on a cone of 90 degrees of vertex, the beam passing through all the elevation values from horizontal to vertical ( low position antenna beam F apb and high position antenna beam F aph ).
  • the rotation of the antenna on the bearing axis makes it possible to orient the beam in all the bearing directions useful for aiming at a satellite.
  • the following example relates to an integrated antennal system mounted on the fuselage of an airliner.
  • the antenna system must have a small thickness to limit aerodynamic drag.
  • Figures 4A and 4B show a sectional view and a perspective view of an antenna installed on a fuselage of an airliner, the dimensions of which are given by way of non-limiting example.
  • the antenna system of FIG. 4 comprises 2 circular flat antennas 20, 21 of 50 cm in diameter, the antennas are arranged by compared to a support 22 assumed horizontal (in practice, the top of the fuselage of the aircraft).
  • the diameter value D 1 and D 2 of the antennas for example, is chosen for example according to the radio transmission application.
  • Each antenna rotates on its mechanical axis, respectively 23, 24
  • the assembly rotates in a bearing around a vertical main axis with respect to the support on which the antenna is positioned. All mechanical axes are motorized by means of engines not shown because they do not participate directly in the principle of the invention.
  • the antennal system is protected for example by a radome 26 having a circular base of 1 meter in diameter and a thickness of 20 cm.
  • the first antenna 20 covers the elevations of 10 to 50 degrees (40 to 80 degrees relative to the vertical 25)
  • the second antenna 21 covers the elevations of 50 to 90 degrees (0 to 40 degrees relative to the vertical 25 defined above).
  • the assembly makes it possible to reach all the elevations between 10 and 90 degrees (0 and 80 degrees relative to the vertical 25) and all the deposits from 0 to 360 degrees, ie the entire useful area for an airliner. .
  • the space available under the flat antennas is available for example to house the various equipment connected to the antenna and to obtain a small integrated system.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

The system has a flat and circular antenna (10) whose mechanical axis (12) is inclined at an angle theta with respect to a bearing rotational axis (11) of an antenna support. Antenna beam (13) makes an angle psi with respect to the axis (12). Rotation of the antenna on the axis (12) covers the beam on a tip cone of 90 degrees. Rotation of the antenna on the axis (11) permits to orient the beam in all bearing directions. An independent claim is also included for a method of transmitting antenna beams in a telecommunication system.

Description

L'invention concerne notamment un système antennaire intégré de télécommunications spatiales pour les stations terrestres mobiles (Satcom).In particular, the invention relates to an integrated antenna system for space telecommunications for mobile earth stations (Satcom).

Elle peut aussi être utilisée dans des domaines connexes, tels que les radars, les faisceaux hertziens, chaque fois que le système antennaire se trouve en mouvement par rapport à son porteur.It can also be used in related fields, such as radars, radio-relay systems, whenever the antenna system is moving relative to its carrier.

Dans les télécommunications spatiales en bande C, X, Ku, Ka, Q, etc, avec les satellites géostationnaires existants, les stations terrestres mobiles sont supposées équipées d'une antenne agile pointée automatiquement sur le satellite de trafic, quelle que soit la position de celui-ci dans le ciel (toutes les élévations de 0 à 90 degrés, tous les gisements de 0 à 360 degrés).In space communications in the C, X, Ku, Ka, Q, etc. bands, with existing geostationary satellites, mobile earth stations are assumed to have an agile antenna automatically pointed at the traffic satellite, irrespective of the position of the satellite. this one in the sky (all elevations from 0 to 90 degrees, all deposits from 0 to 360 degrees).

Dans la description les directions de verticale et d'horizontale sont référencées sur les figures. Elles se rapportent par exemple à un sol supposé horizontal et plan noté S, ou encore au lieu sur lequel est disposée l'antenne.In the description the directions of vertical and horizontal are referenced in the figures. They relate for example to a soil assumed horizontal and plane noted S, or to the place on which is arranged the antenna.

La figure 1 montre un exemple de système antennaire usuel selon l'art antérieur. L'antenne est une antenne parabolique motorisée 1, représentée ici avec son réflecteur principal 2 et sa source 3. L'ensemble est protégé par un radôme 4. La figure 1 montre l'antenne dans 3 positions d'élévation, respectivement une position horizontale, une position à 45 degrés et une position verticale. Le volume interne du radôme 4 est majoritairement occupé par l'antenne 1 et son débattement. Toute proportion gardée, il reste donc peu de place pour loger les équipements associés à l'antenne, tels que la motorisation, l'amplificateur de puissance, l'amplificateur faible bruit, les transpositions et tous les équipements habituellement associés au fonctionnement d'une antenne. Une partie de ces équipements est parfois déportée dans d'autres compartiments de la station, souvent de manière peu commode.Figure 1 shows an example of antennal system usual according to the prior art. The antenna is a motorized parabolic antenna 1, represented here with its main reflector 2 and its source 3. The assembly is protected by a radome 4. FIG. 1 shows the antenna in 3 elevation positions, respectively a horizontal position , a 45 degree position and a vertical position. The internal volume of the radome 4 is mainly occupied by the antenna 1 and its movement. Proportionately, there is therefore little room for equipment associated with the antenna, such as motorization, power amplifier, low noise amplifier, transpositions and all the equipment usually associated with the operation of an antenna. antenna. Some of these equipment is sometimes deported to other compartments of the station, often inconveniently.

Une autre solution selon l'état de l'art antérieur consiste à utiliser une antenne à balayage électronique 5, tel que représentée sur la figure 2. Ce type d'antenne présente notamment comme propriétés d'être plane et de pouvoir dépointer électroniquement son faisceau selon un axe « A ». La figure 2 montre une antenne réalisant un balayage électronique en élévation 6 et un dépointage mécanique en gisement 7. Par rapport à l'antenne de la figure 1, il n'y a plus de débattement d'antenne. En comparant la figure 1 et la figure 2, on constate qu'une bonne partie du volume initialement occupé par le débattement de l'antenne est libéré et donc disponible (volume référencé 8 sur la figure).Another solution according to the state of the prior art is to use a scanning antenna 5, as shown in Figure 2. This type of antenna has such properties as being flat and being able to detach its beam electronically. along an axis "A". FIG. 2 shows an antenna performing an electronic scanning in elevation 6 and a mechanical misalignment in bearing 7. With respect to the antenna of FIG. 1, there is no longer any antenna deflection. Comparing Figure 1 and Figure 2, we see that much of the volume initially occupied by the deflection of the antenna is released and therefore available (volume referenced 8 in the figure).

Cette solution rencontre néanmoins des difficultés relatives à l'antenne à balayage électronique; à savoir, le coût, les performances, etc.This solution nevertheless encounters difficulties relating to the electronic scanning antenna; namely, cost, performance, etc.

Le système antennaire selon l'invention réside sur une approche nouvelle utilisant judicieusement une antenne plate dont le faisceau d'antenne est fixe mais dépointé de l'axe mécanique de l'antenne, ce dernier étant également incliné par rapport à un axe mécanique principal.The antennal system according to the invention resides on a new approach judiciously using a flat antenna whose antenna beam is fixed but remote from the mechanical axis of the antenna, the latter being also inclined with respect to a main mechanical axis.

L'invention concerne un système antennaire intégré pour des télécommunications comportant au moins une antenne sensiblement plate et circulaire équipée d'un axe de rotation coïncidant avec son axe, l'antenne étant solidaire d'un support comprenant lui-même un axe de rotation caractérisé en ce que l'axe de rotation de l'antenne est incliné d'un angle θ par rapport à l'axe de rotation du support d'antenne et le faisceau d'antenne fait un angle ϕ par rapport à l'axe de rotation de l'antenne.The invention relates to an integrated antennal system for telecommunications comprising at least one substantially flat and circular antenna equipped with an axis of rotation coinciding with its axis, the antenna being secured to a support comprising itself a rotational axis characterized in that the axis of rotation of the antenna is inclined at an angle θ with respect to the axis of rotation of the antenna support and the antenna beam is at an angle φ with respect to the axis of rotation of the antenna.

Le diamètre de l'antenne est par exemple choisi en fonction de l'application de communication.The diameter of the antenna is for example chosen according to the communication application.

L'angle θ est par exemple égal à 45 degrés par rapport à un deuxième axe de rotation (axe de rotation du support) sensiblement vertical, et l'angle ϕ est égal à 45 degrés. L'ensemble présente ainsi la propriété par rotation de chacun des angles et selon les valeurs prises de couvrir le demi-angle situé au-dessus de l'horizontale par le faisceau d'antenne.The angle θ is for example equal to 45 degrees relative to a second axis of rotation (axis of rotation of the support) substantially vertical, and the angle φ is equal to 45 degrees. The whole thus presents the property by rotation of each of the angles and according to the values taken to cover the half-angle located above the horizontal by the antenna beam.

Le système antennaire selon l'invention présente l'avantage déterminant d'utiliser une simple antenne plate passive à faisceau fixe dont la conception peut être optimisée pour l'inclinaison du faisceau retenue. Les performances radioélectriques en terme de gain d'antenne dans l'axe de faisceau, ainsi que de rayonnement hors axe en termes de lobes secondaires sont alors optimales et maintenues constantes quelque soit le pointage souhaitéThe antennal system according to the invention has the decisive advantage of using a simple fixed beam passive flat antenna whose design can be optimized for the inclination of the retained beam. The radio performance in terms of antenna gain in the beam axis, as well as off-axis radiation in terms of secondary lobes are then optimal and kept constant regardless of the desired score

Le système antennaire selon l'invention présente également l'avantage d'être compact et intégré. La rotation selon les deux axes permet de couvrir un domaine de pointage significatif. Le volume initialement nécessaire pour le débattement de la parabole se libère pour laisser la place aux équipements associés à l'antenne.The antenna system according to the invention also has the advantage of being compact and integrated. The rotation along the two axes makes it possible to cover a significant pointing domain. The volume initially required for the movement of the dish is released to leave room for equipment associated with the antenna.

D'autres caractéristiques et avantages de l'invention apparaîtront mieux à la lecture de la description qui suit d'un exemple de réalisation donné à titre illustratif et nullement limitatif annexée des figures qui représentent :

  • La figure 1 un exemple de système antennaire selon l'état de l'art antérieur,
  • La figure 2 une solution d'antenne compacte à balayage électronique selon l'art antérieur,
  • La figure 3 un exemple d'antenne illustrant le principe mis en oeuvre par l'invention,
  • La figure 4A une vue en coupe et la figure 4B une vue en perspective d'une variante de réalisation du système antennaire de la figure 3 comprenant deux antennes.
Other features and advantages of the invention will emerge more clearly on reading the following description of an exemplary embodiment given by way of illustration and in no way limiting attached to the figures which represent:
  • FIG. 1 an example of antennal system according to the state of the prior art,
  • FIG. 2 a compact electronic scanning antenna solution according to the prior art,
  • FIG. 3 is an example of an antenna illustrating the principle implemented by the invention,
  • Figure 4A is a sectional view and Figure 4B is a perspective view of an alternative embodiment of the antennal system of Figure 3 comprising two antennas.

La figure 3 schématise un système antennaire comprenant une antenne plate 10, circulaire, de faisceau incliné par exemple à (ϕ = 45° par rapport à son axe mécanique 12, lui-même incliné à 45 degrés par rapport à la verticale du lieu. L'antenne tourne sur son axe mécanique propre 12, un moteur 15 permet cette rotation. L'antenne est associée à un axe de rotation vertical en gisement 11 également motorisé 16. Les autres éléments associés à l'antenne et connus de l'Homme du métier, ne sont pas représentés car ils n'interviennent pas dans la compréhension de l'invention.FIG. 3 schematizes an antenna system comprising a flat circular antenna 10 of inclined beam for example at (φ = 45 ° by relative to its mechanical axis 12, itself inclined at 45 degrees to the vertical of the place. The antenna rotates on its own mechanical axis 12, a motor 15 allows this rotation. The antenna is associated with a vertical axis of rotation in the bearing 11 also motorized 16. The other elements associated with the antenna and known to those skilled in the art, are not shown because they do not intervene in the understanding of the 'invention.

Selon cet agencement, une rotation de l'antenne sur son axe mécanique 12 fait courir le faisceau d'antenne 13 sur un cône de 90 degrés de sommet, le faisceau passant par toutes les valeurs d'élévation de l'horizontale à la verticale (faisceau d'antenne position basse Fapb et faisceau d'antenne position haute Faph). La rotation de l'antenne sur l'axe de gisement permet d'orienter le faisceau dans toutes les directions de gisement utiles pour viser un satellite.According to this arrangement, a rotation of the antenna on its mechanical axis 12 runs the antenna beam 13 on a cone of 90 degrees of vertex, the beam passing through all the elevation values from horizontal to vertical ( low position antenna beam F apb and high position antenna beam F aph ). The rotation of the antenna on the bearing axis makes it possible to orient the beam in all the bearing directions useful for aiming at a satellite.

De manière plus générale, soit θ l'inclinaison de l'axe mécanique de l'antenne par rapport à la verticale du lieu et ϕ l'inclinaison du faisceau d'antenne par rapport à l'axe mécanique d'antenne, la rotation de l'antenne sur son axe mécanique permet d'atteindre toutes les valeurs d'élévations comprises entre (θ + ϕ) et (θ - ϕ) par rapport à la verticale, soit un secteur angulaire égal à 2 fois la plus petite valeur de θ ou ϕ, soit 2 fois min(θ, ϕ). Pour θ = ϕ = 45 degrés, le faisceau prend donc toutes les valeurs d'élévation comprises entre 0 et 90 degrés comme l'indique la figure 3.More generally, let θ be the inclination of the mechanical axis of the antenna with respect to the vertical of the locus and φ the inclination of the antenna beam with respect to the mechanical antenna axis, the rotation of the antenna on its mechanical axis makes it possible to reach all the values of elevations between (θ + φ) and (θ - φ) with respect to the vertical, ie an angular sector equal to 2 times the smallest value of θ or φ, ie 2 times min (θ, φ). For θ = φ = 45 degrees, the beam thus takes all elevation values between 0 and 90 degrees as shown in Figure 3.

Afin de mieux faire comprendre le principe mis en oeuvre dans l'invention, l'exemple qui suit concerne un système antennaire intégré monté sur le fuselage d'un avion de ligne. Dans cette application, le système antennaire doit présenter une faible épaisseur pour limiter la traînée aérodynamique.In order to better understand the principle implemented in the invention, the following example relates to an integrated antennal system mounted on the fuselage of an airliner. In this application, the antenna system must have a small thickness to limit aerodynamic drag.

Les figures 4A et 4B schématisent une vue en coupe et une vue en perspective d'une antenne installée sur un fuselage d'un avion de ligne, dont les dimensions sont données à titre d'exemple non limitatif.Figures 4A and 4B show a sectional view and a perspective view of an antenna installed on a fuselage of an airliner, the dimensions of which are given by way of non-limiting example.

Le système antennaire de la figure 4 comprend 2 antennes plates 20, 21 circulaires de 50 cm de diamètre, les antennes sont disposées par rapport à un support 22 supposé horizontal (en pratique, le haut du fuselage de l'avion). La valeur du diamètre respectivement D1 et D2 des antennes est choisie par exemple en fonction de l'application de radio-transmission. Chacune des antennes 20, 21 (plan de l'antenne qui est incliné) est inclinée par exemple d'un angle α1= α2 = 20 degrés par rapport au support 22. Chaque antenne tourne sur son axe mécanique, respectivement 23, 24. La première antenne 20 présente un faisceau incliné d'un angle ϕ1 = 60° et la deuxième antenne a un faisceau incliné d'un angle ϕ2 = 20°. L'ensemble tourne en gisement autour d'un axe principal 25 vertical par rapport au support sur lequel est positionné l'antenne. Tous les axes mécaniques sont motorisés au moyen de moteurs non représentés car ne participant pas directement au principe de l'invention. Le système antennaire est protégé par exemple par un radôme 26 ayant une base circulaire de 1 mètre de diamètre et une épaisseur de 20 cm.The antenna system of FIG. 4 comprises 2 circular flat antennas 20, 21 of 50 cm in diameter, the antennas are arranged by compared to a support 22 assumed horizontal (in practice, the top of the fuselage of the aircraft). The diameter value D 1 and D 2 of the antennas, for example, is chosen for example according to the radio transmission application. Each of the antennas 20, 21 (plane of the antenna which is inclined) is inclined for example by an angle α 1 = α 2 = 20 degrees with respect to the support 22. Each antenna rotates on its mechanical axis, respectively 23, 24 The first antenna 20 has a beam inclined at an angle φ 1 = 60 ° and the second antenna has a beam inclined at an angle φ 2 = 20 °. The assembly rotates in a bearing around a vertical main axis with respect to the support on which the antenna is positioned. All mechanical axes are motorized by means of engines not shown because they do not participate directly in the principle of the invention. The antennal system is protected for example by a radome 26 having a circular base of 1 meter in diameter and a thickness of 20 cm.

Selon cet agencement, la première antenne 20 couvre les élévations de 10 à 50 degrés (40 à 80 degrés par rapport à la verticale 25), la deuxième antenne 21 couvre les élévations de 50 à 90 degrés (0 à 40 degrés par rapport à la verticale 25 définie précédemment). L'ensemble permet notamment d'atteindre toutes les élévations comprises entre 10 et 90 degrés (0 et 80 degrés par rapport à la verticale 25) et tous les gisements de 0 à 360 degrés, soit la totalité du secteur utile pour un avion de ligne. L'espace disponible sous les antennes plates est disponible par exemple pour loger les différents équipements connexes à l'antenne et obtenir un système intégré de faible dimension.According to this arrangement, the first antenna 20 covers the elevations of 10 to 50 degrees (40 to 80 degrees relative to the vertical 25), the second antenna 21 covers the elevations of 50 to 90 degrees (0 to 40 degrees relative to the vertical 25 defined above). The assembly makes it possible to reach all the elevations between 10 and 90 degrees (0 and 80 degrees relative to the vertical 25) and all the deposits from 0 to 360 degrees, ie the entire useful area for an airliner. . The space available under the flat antennas is available for example to house the various equipment connected to the antenna and to obtain a small integrated system.

Claims (6)

Système antennaire intégré pour des télécommunications comportant: au moins une antenne (10) sensiblement plate et circulaire équipée d'un axe de rotation (12) coïncidant avec son axe, l'antenne (10) étant solidaire d'un support comprenant lui-même un axe de rotation (11) caractérisé en ce qu'il comprend au moins deux antennes plates (20, 21) sensiblement circulaires de diamètre (D1, D2), chacune des antennes (20, 21) est inclinée par exemple d'un angle α par rapport au support d'antenne, et en ce que l'antenne (20) présente un faisceau incliné d'un angle ϕ1 et l'antenne (21) a un faisceau incliné d'un angle ϕ2 par rapport à l'axe de rotation de l'antenne et en ce qu'il comporte un dispositif adapté à faire tourner les antennes et leur support.Antenna system integrated for telecommunications comprising: at least one antenna (10) substantially flat and circular equipped with an axis of rotation (12) coinciding with its axis, the antenna (10) being secured to a support comprising itself an axis of rotation (11) characterized in that it comprises at least two substantially circular flat antennae (20, 21) of diameter (D 1 , D 2 ), each of the antennas (20, 21) is inclined for example by an angle α with respect to the antenna support, and in that the antenna (20) has a beam inclined at an angle φ 1 and the antenna (21) has a beam inclined at an angle φ 2 relative to to the axis of rotation of the antenna and in that it comprises a device adapted to rotate the antennas and their support. Système antennaire selon la revendication 1 caractérisé en ce que le α1= α2 = 20 degrés, ϕ1 = 60° et ϕ2 = 20°.Antenna system according to claim 1 characterized in that the α 1 = α 2 = 20 degrees, φ 1 = 60 ° and φ 2 = 20 °. Système antennaire selon la revendication 1 caractérisé en ce que le diamètre de l'antenne est choisi en fonction de l'application de communication.Antenna system according to claim 1 characterized in that the diameter of the antenna is selected according to the communication application. Système antennaire selon l'une des revendications 1 à 3 caractérisé en ce qu'il comprend un radôme englobant les éléments antennaires.Antenna system according to one of claims 1 to 3 characterized in that it comprises a radome encompassing the antenna elements. Système antennaire selon l'une des revendications 1 à 4 caractérisé en ce qu'il est disposé sur un fuselage d'avion.Antenna system according to one of Claims 1 to 4, characterized in that it is arranged on an aircraft fuselage. Procédé d'émission d'un ou de plusieurs faisceaux d'antennes dans un système de télécommunications, caractérisé en ce que l'on fait tourner un ensemble comprenant au moins deux antennes plates (20, 21) sensiblement circulaires de diamètre (D1, D2), chacune des antennes (20, 21) est inclinée par exemple d'un angle α par rapport au support d'antenne, l'antenne (20) présentant un faisceau incliné d'un angle ϕ1 et l'antenne (21) a un faisceau incliné d'un angle ϕ2 par rapport à l'axe de rotation de l'antenne, la rotation s'effectuant en gisement autour d'un axe principal (25) vertical par rapport au support sur lequel est positionné l'ensemble.Method for transmitting one or more antenna beams in a telecommunications system, characterized in that an assembly comprising at least two substantially circular flat antennas (20, 21) of diameter (D 1 , D 2 ), each of the antennas (20, 21) is inclined for example an angle α relative to the antenna support, the antenna (20) having a beam inclined at an angle φ 1 and the antenna (21) has a beam inclined at an angle φ 2 relative to to the axis of rotation of the antenna, the rotation being carried out in bearing around a main axis (25) vertical relative to the support on which is positioned the assembly.
EP05108836A 2004-09-28 2005-09-26 Space telecommunications integrated antenna system for mobile terrestrial stations (SATCOMS) Not-in-force EP1641071B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0410268A FR2875952B1 (en) 2004-09-28 2004-09-28 INTEGRATED ANTENNA SYSTEM FOR SPACE TELECOMMUNICATIONS FOR MOBILE TERRESTRIAL STATIONS (SATCOMS)

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EP1641071A1 true EP1641071A1 (en) 2006-03-29
EP1641071B1 EP1641071B1 (en) 2013-03-13

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US7352331B2 (en) 2008-04-01
US20060071867A1 (en) 2006-04-06
ES2413010T3 (en) 2013-07-15
EP1641071B1 (en) 2013-03-13
FR2875952A1 (en) 2006-03-31

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