Movable antenna support

Abstract

The invention relates to an antenna support (1) comprising: - a base (10), - at least one ring (20) comprising means for securing an antenna element, - guide means (30) for guiding rotation of the ring about an axis of rotation (A1), - drive means (40) for rotating the ring around the axis of rotation, and - means (50) for determining the angular position of the ring about the axis of rotation. According to the invention, the guide means, the drive means and the determination means are mounted on the base on the external side of the ring.

Description

TECHNICAL FIELD OF THE INVENTION

[0001] The present invention relates generally to the field of antennas, and more particularly to that of satellite communication antennas, which require platforms stabilized with one or more degrees of freedom.

[0002] It relates more particularly to an antenna support comprising a base, at least one ring including means for securing an antenna element, means for guiding the ring in rotation around an axis of rotation, means for driving the ring in rotation around the axis of rotation, and means for determining the angular position of the ring around the axis of rotation.

[0003] The invention also relates to a vehicle, for example an aircraft, comprising an antenna fixed to an antenna support as mentioned above. STATE OF THE ART

[0004] To enable an aircraft to communicate with the outside world, it is known to equip it with a mechanically scanned flat antenna adapted to communicate with a satellite.

[0005] Such an antenna comprises a source emitting a diverging beam and means for guiding this beam in a desired direction. These guiding means are mounted to rotate about an axis, so that the beam can be constantly directed towards the desired satellite, even when the aircraft changes course or altitude.

[0006] It is then known to use a stabilized platform to receive this mechanically scanned flat antenna, which provides the aforementioned guidance means with the desired rotational mobility(ies).

[0007] This platform is usually integrated into the antenna itself.

[0008] We also know from document US2010149059 of a directional antenna mount for installation on a ship. In this document, the mount includes a support to which an antenna is attached and which is housed within a radome. More specifically, it comprises a horizontal insulation assembly to be fixed to the ship, and a vertical insulation assembly that supports the antenna and is pivotally mounted on the first assembly around an azimuth axis by means of a hub.

[0009] Also known from document US2010253586 is a directional antenna mount that is adjustable in azimuth and elevation. This mount consists of a rotating wheel mounted on a base frame, which supports an antenna base and an antenna. A belt passes around the wheel and around two drive wheels coupled to motors, thus driving the wheel's rotation.

[0010] Document FR1544366 also describes a radio telescope whose reflector can pivot in both height and azimuth. To achieve this, it comprises a truncated conical concrete tower equipped at its apex with a platform on which a parabolic mirror support frame is mounted to pivot in azimuth. This support frame has two bearings allowing the parabolic mirror to pivot in height, and two arms that extend down the length of the tower. Azimuth control is achieved at the base of the tower. This is accomplished using a ring-shaped track and support rollers driven by motors. PRESENTATION OF THE INVENTION

[0011] The present invention proposes an antenna support which is not integrated into the antenna and is therefore adaptive in that it allows for the reception of different antenna models.

[0012] More specifically, the invention proposes a support as defined in claim 1.

[0013] Thus, thanks to the invention, the antenna can be fixed in whole or in part inside the ring, which gives it an ideal position to perform its function of communicating with a satellite and prevents it from interfering with the elements of the support.

[0014] The architecture of this support also has the advantage of being modular, in that it allows for the use of antennas of different dimensions by changing only the base and the ring, with all other elements remaining virtually unchanged.

[0015] The proposed support can also have a very small thickness (measured along the axis of rotation), so that it can easily be used in the aeronautical field since, once placed under a radome of similarly small dimensions, it will generate very low drag.

[0016] Other advantageous and non-limiting features of the antenna support according to the invention, taken individually or in all technically possible combinations, are defined in claims 2 and following.

[0017] The invention also proposes a set of two antenna supports as above, in which each ring of one of the antenna supports has a diameter distinct from that of each ring of the other of the antenna supports, and in which the guiding means, part of the driving means and part of the determining means are identical in the two antenna supports.

[0018] The invention also proposes a vehicle comprising means of propulsion, an antenna and an antenna support as above.

[0019] Of course, the different features, variants and embodiments of the invention can be combined with each other in various ways as long as they are not incompatible or mutually exclusive. DETAILED DESCRIPTION OF THE INVENTION

[0020] The description that follows, with regard to the attached drawings, given by way of non-limiting examples, will make it clear what the invention consists of and how it can be carried out.

[0021] Regarding the attached drawings: there figure 1 is a schematic perspective view of an antenna support according to the invention; the figure 2 is a schematic perspective view of the base and the means of guiding the antenna support of the figure 1 ; there figure 3 is a schematic perspective view of a cross-section of an element of the guiding means of the figure 2 ; there figure 4 is a schematic perspective view of the base and drive means of the antenna support of the figure 1 ; there figure 5 is a schematic perspective view of the base and the means of determining the antenna support of the figure 1 ; there figure 6 is a schematic perspective view of an aircraft equipped with the antenna mount of the figure 1 .

[0022] On the figure 1 , we have shown an example of an antenna support 1 conforming to the invention.

[0023] In this example, as the figure 6 , the antenna support 1 is specifically designed to be installed under a radome 3 of an aircraft 2, in order to accommodate a mechanically scanned antenna.

[0024] Of course, this mount could also be used in any other type of vehicle (car, ship, etc.) and even on land-based infrastructure. It could also accommodate other types of antennas.

[0025] Antenna support 1 is modular in that it can accommodate antennas with varying numbers of functions. In the example shown on the figure 1 , this antenna support 1 has three separate movable stages, which allows three functions to be offered to the antenna, namely here an azimuth adjustment (i.e. an adjustment of the aimed heading), an elevation adjustment (i.e. an adjustment of the aimed height), and an adjustment of the transmit and receive frequency.

[0026] Of course, alternatively, it could have only one floor and one function, or two floors and two functions, or even a larger number of floors and functions. However, a number of floors between 1 and 3 is preferred.

[0027] Finally, this antenna support 1 is modular in that by changing a small number of its components, it can accommodate antennas of various shapes and sizes.

[0028] As shown by figure 1 This antenna support 1 includes a base 10 which supports, for each of the three levels: a crown 20, means for guiding the crown 20 in rotation about an axis of rotation A1, means for driving the crown 20 in rotation about the axis of rotation A1, and means for determining the angular position of the crown 20 about the axis of rotation A1.

[0029] According to a particularly advantageous feature of the invention, the guiding means 30, the driving means 40 and the determining means 50 of each stage are mounted on the base 10, on the outside side of the ring 20.

[0030] This means that, the ring 20 defining a cylinder of revolution around the axis of rotation A1, whose radius is equal to the minimum radius of the ring 20, the guiding means 30, the driving means 40 and the determining means 50 are mounted outside this cylinder of revolution.

[0031] The antenna element which is carried by the crown is intended to be installed mostly inside this cylinder of revolution.

[0032] We can describe in detail the different elements constituting the antenna support 1, by focusing on only one of the stages of this antenna support 1, the elements of the other stages being almost identical.

[0033] Base 10 is clearly visible on the figure 5 .

[0034] It is presented here in the form of an annular plate, whose general shape is essentially a revolution around the axis of rotation A1.

[0035] It is therefore defined between an outer peripheral edge 11 and an inner peripheral edge 12, both of circular shapes.

[0036] This base 10 is here drilled with tapped holes, some of which allow the components of the three stages of the antenna support 1 to be fixed to it.

[0037] As the figure 1 , four of these tapped holes are used to fix two handles 90 to the base 10. These two handles 90, located diametrically opposite each other, allow easy handling of the antenna support 1.

[0038] The base 10 is intended to be fixed to the chassis of the vehicle, i.e. here to the structure of aircraft 2.

[0039] For this purpose, it has holes located on its periphery, which allow it to be screwed onto the structure of aircraft 2.

[0040] As shown by figure 2 , the crown 20 has a ring shape, substantially of revolution around the axis of rotation A1.

[0041] It includes an outer ring 22 which has, projecting from its inner face, a peripheral rib 21. The crown thus has an L-shaped cross-section (the base of this L being oriented towards the axis of rotation A1 and forming the peripheral rib 21).

[0042] This ring 20 includes means for attaching 25 an antenna element.

[0043] These fastening means 25 are preferably provided so as to allow the antenna element to be fixed in a removable (i.e. non-permanent) manner on the ring 20.

[0044] They are presented here in the form of tapped holes made through the peripheral rib 21, along axes parallel to the axis of rotation A1. These tapped holes are regularly distributed around this axis of rotation A1.

[0045] For reasons of mass reduction and installation constraints, the ring 20 has an outer diameter smaller than the inner diameter of the base 10.

[0046] The guiding means 30, which are fixed to the base 10, are then designed to cooperate with this ring 20 so as to allow it a single degree of freedom, namely a rotational mobility around the axis of rotation A1.

[0047] These guidance systems could take very different forms. They could, for example, consist of three fixed pads or three rotating rollers distributed around the ring 20.

[0048] Here, they instead comprise six rotating rollers 311, 312, 321, 322, 331, 332, which are distributed in pairs on three cassettes 313, 323, 333 mounted on the base 10.

[0049] As shown by figure 3 on which one of the rollers 311 is shown in section, each roller comprises two almost identical parts 314, 315 bolted together.

[0050] Thus, each of these two parts 314, 315 includes a wheel 316 which is designed to roll against the ring 20 and which is pierced in its center by an opening, and a tube 317 which borders this opening on one side only.

[0051] These two parts 314, 315 are assembled by placing the two tubes 317 in line with each other, threading a screw 318 through these tubes, and screwing a nut onto the end of this screw.

[0052] One part of each roller has a recess to allow the body of the 318 screw to pass through, and the other part has a threaded hole into which the screw is tightened. The nut acts as a mechanical lock to prevent loosening due to vibrations.

[0053] Each pulley 311, 312 is rotatably mounted on the cassette 313 around an axis A3, A4. To minimize friction between the cassette 313 and the pulleys 311, 312, ball bearings 319 are used here.

[0054] As shown by figure 3 The inner ring of the ball bearing 319 is mounted on the tubes 317 of the roller 311 and is held axially by the two wheels 316. Its outer ring is engaged inside an opening 350 provided correspondingly in the cassette 313.

[0055] In practice, the two tubes 317 are fitted into the inner ring of the ball bearing 319. The screw 318 acts as a clamping device. Alternatively, an angular contact bearing could be used. In this version, the screw 318 would also serve to preload the bearing.

[0056] To axially lock this outer ring, the opening 350 has a shoulder 351 at its base, which reduces its cross-section. The cassette 313 also includes a plate 352, which is drilled in its center to avoid interfering with the roller 311 and is screwed onto the body of the cassette 313, so as to lock the outer ring of the ball bearing 319 against the shoulder 351.

[0057] The two wheels 316 of each roller 311, 312, 321, 322, 331, 332 are designed to roll along the outer face of the ring 20, so as to keep the latter centered on the axis of rotation A1.

[0058] The locking of the crown 20 in height (along the axis of rotation A1) is also ensured here by the rollers.

[0059] For this purpose, the two edges of the outer face of the ring 20 are chamfered so as to form paths for the two wheels 316 of each roller 311, 312, 321, 322, 331, 332, which axially hold the ring 20 together.

[0060] We note here that the outer face of the crown 20 is grooved halfway up, which allows it to accommodate part of the determination means 50 in an area where the wheels 316 do not roll.

[0061] As shown by figure 3 , the cassette 313 has a trapezoidal body, with two openings 350 to accommodate the two aforementioned ball bearings 319 and a central hole 360, with axis A2 (hereafter called pivot axis A2) parallel to axes A3, A4.

[0062] This central hole 360 ​​is partially closed on its upper side (opposite the base 10) by a wall 362 with a hole in its center. It is used here to mount the cassette 313 with a single movement on the base 10, namely a pivoting movement relative to the base 10 around the pivot axis A2.

[0063] As shown by figure 2 Each cassette 313, 323, 333 is mounted on a base 361, which is screwed onto the plinth 10 and whose height is adjusted so that the rollers hold the ring 20 at the desired height. Each base 361 has a cylindrical stud (not visible in the figures) into which the central hole 360 ​​of the cassette 313, 323, 333 is engaged. Screwing means are used to secure the wall 362 against the top of this cylindrical stud, thus locking the cassette in place at a specific height (along the pivot axis A2).

[0064] The three cassettes 313, 323, 333 are here regularly distributed around the axis of rotation A1, in the sense that their pivot axes A2 are angularly separated in pairs by 120 degrees around the axis of rotation A1.

[0065] The mobility of each cassette around its pivot axis A2 ensures that the six rollers come into contact with the crown 20, compensating for any defects or assembly play (this mobility allows for an isostatic assembly).

[0066] For this same purpose, only one of the cassettes 333 is mounted to move in translation on the base 10 along an axis A5 inclined or orthogonal to the axis of rotation A1 (see figure 2 ). Here, this cassette 333 is mounted mobile in translation along an axis A5 perpendicular to the axis of rotation A1.

[0067] This is achieved using a sliding system 340 which includes a movable arm 341 to which the cassette 333 is attached, and a fixed arch 342 which is attached to the base 10.

[0068] The movable arm 341 has several functions. First, it serves as a base for the cassette 333. It also receives the moving part of a miniature ball-bearing slide (not visible in the figures) which guides its movement. The slide itself has a fixed part which is attached to the base 10, either directly or via a riser.

[0069] This 340 slide system is equipped with elastic means, for example a spring (not visible in the figures) allowing the rollers 331, 332 to be returned towards the ring 20.

[0070] In this case, the fixed arch 342 then has the sole function of receiving the springs and delivering the thrust on the mobile arm 341 to hold the crown 20 in place.

[0071] The main advantage of this 340 slide system is that it preloads the 319 ball bearings (i.e., pre-stresses them radially with respect to the axis of rotation A1), which prevents any play in the guidance of the ring around the axis of rotation A1. It also allows for the compensation of any play between the rollers and the ring 20, particularly in the event of temperature variations.

[0072] Preferably, the rollers and the crown are made of materials which reduce friction and whose resistance to contact pressures (in the sense of "Hertz pressure") is good.

[0073] They are also machined to have very low roughness, in order to further reduce friction.

[0074] Here, the 20 crown receives a surface treatment by Hard Anodic Oxidation (HAO) with a Teflon sealant.

[0075] Since the rollers are very small compared to the 20-tooth crown, they are made of a low-mass titanium alloy with good resistance to stress.

[0076] The drive means 40 for the rotating crown 20 around the axis of rotation A1 are illustrated in the figure 4 .

[0077] These drive systems could take various forms. They could include a rack and pinion system or any other suitable system.

[0078] Here, the preferred drive solution uses pulleys and a 450 belt wrapped around the 20 crown.

[0079] This 450 belt is unique in that it is made entirely of metal. It is presented here as a simple, thin metal strip.

[0080] It therefore has a coefficient of thermal expansion close to that of the pulleys which drive it, good resistance to temperature variations, a reduced mass and good shock resistance.

[0081] The drive means 40 also include a motor 410 that drives the belt 450. This motor 410 is flat so as not to create any obstruction along the thickness of the antenna support 1 (i.e., along the axis of rotation A1). It therefore has a diameter greater than its thickness. It could, for example, be a brushless motor.

[0082] This 410 motor has a housing from which emerges an output shaft equipped with a drive pulley (not visible on the figure 4 ) around which the 450 belt is wound.

[0083] As depicted on the figure 4 , this box is fixed to a tripod so that its output shaft points towards the base 10 and extends to the height of the crown 20.

[0084] In order to maximize the angular sector in which the belt 450 is in contact with the drive pulley, the drive means also include two idler pulleys 420, 430 located on either side of the belt 450, between the motor 410 and the ring 20.

[0085] One of these return pulleys 420 is mounted with a single degree of freedom, namely rotational mobility relative to the base 10 around an axis parallel to the axis of rotation A1.

[0086] The other of the return pulleys 430 is mounted on the base 10 with a single rotational mobility around an axis parallel to the axis of rotation A1 and a single translational mobility along an axis A6 orthogonal to the axis of rotation A1.

[0087] Here, this axis A6 is chosen in such a way that, in the absence of a return pulley, it would be perpendicular to the corresponding strand of the belt 450. Thus, the axis A6 is medial to the directions formed by the two taut and straight strands of the belt which are on either side of the return pulley.

[0088] This other return pulley 430 is for this purpose equipped with a tensioning system 440 of identical architecture to that of the aforementioned slide system 340 (it thus includes a movable arm on which the return pulley is mounted, a fixed arch which is fixed to the base, and elastic means for returning the return pulley 430 to rest against the belt 450).

[0089] This tensioning system 440 allows for continuous tensioning of the belt 450, optimizing the coefficient of friction between the belt 450 and the drive pulley to prevent slippage. It also compensates for variations in the circularity of the pulleys and the sprocket 20, as well as differential expansion between the components.

[0090] On the figure 5 , we have more precisely represented the means of determining 50 the angular position of the crown 50 relative to the base 10 around the axis of rotation A1.

[0091] Here again, these means of determination could take different forms.

[0092] Instead of the aforementioned 410 motor, a stepper motor could have been used to perform both drive and determination functions. Alternatively, an encoder wheel in contact with the ring gear could have been used.

[0093] The preferred solution here for its accuracy and cost-effectiveness is to use a 530 encoder strip wound around the ring 20, and two 510, 520 encoder readers fixed to the support 10 and spaced angularly apart from each other around the axis of rotation A1.

[0094] The 530 encoder strip is here a magnetic strip which is placed in the groove provided in the outer face of the ring 20. It allows a measurement of the angular position of the ring 20 without contact, that is to say without friction or wear.

[0095] The 510 and 520 encoder readers are adapted to measure the magnetic field and therefore to detect the variations in the magnetic field induced by the 530 encoder strip when the 20 ring rotates.

[0096] The 530 encoder strip has a magnetic pattern that repeats regularly along its length. This magnetic strip is wound and glued onto the ring 20. Its ends, when facing each other or in contact, create a break in the continuity of the magnetic pattern, which could lead to a measurement error.

[0097] The use of two separate 510, 520 encoder readers then makes it possible to measure the magnetic field in two separate locations, so that one of the two readers can continuously perform an exact measurement of the angular position of the ring 50 relative to the base 10 around the axis of rotation A1.

[0098] Here, the two reader-encoders 510, 520 are fixed on bases 511, 521 screwed to the base 10.

[0099] These two bases 511, 521 include means for adjusting the radial position of the encoder readers 510, 520 (relative to the axis of rotation A1), so as to be able to adjust the reading distance separating them from the encoder strip 530. For this purpose, the holes receiving the fixing screws of the bases 511, 521 have oblong shapes allowing adjustment of the radial position of the encoder readers 510, 520.

[0100] The second and third stages of antenna support 1 have architectures analogous to that of the first stage described above.

[0101] Thus, the second stage includes a second ring 20A on which a second antenna element can be attached, second means for guiding the second ring 20A in rotation around the axis of rotation A1, second means for driving the second ring 20A in rotation around the axis of rotation A1, and second means for determining the angular position of the second ring 20A around the axis of rotation A1.

[0102] Similarly, the third stage includes a third ring 20B on which a third antenna element can be attached, third guidance means 30B rotating the third ring 20B around the axis of rotation A1, third drive means 40B rotating the third ring 20B around the axis of rotation A1, and third means for determining the angular position of the third ring 20B around the axis of rotation A1.

[0103] Here again, these guiding means 30A, 30B, driving means 40A, 40B and determining means 50A, 50B are mounted on the base 10 on the outside side of the rings 20, 20A, 20B.

[0104] The guiding means 30, 30A, 30B are specifically designed to maintain the three rings 20, 20A, 20B one above the other, in a coaxial superimposed position.

[0105] The guiding means 30A, 30B, driving means 40A, 40B and determining means 50A, 50B include for this purpose fixing bases to the base 10 of different heights, so as to be at the desired height.

[0106] It should also be noted that, as the figure 1 The belt drive motors 410, 410A, 410B are not all oriented in the same way; those driving the second and third sprockets 20A, 20B are oriented so that their drive pulleys 411A, 411B face upwards, the opposite of that illustrated in the figure 4.

[0107] As explained above, the antenna support 1 is modular, in that it allows for the use of antennas of different dimensions by changing only a small number of its components.

[0108] In the example shown in the figures, the antenna support 1 is designed to accommodate a small antenna (the diameter of its rings is 300 mm).

[0109] We can then consider a second antenna support, not shown, allowing us to receive a large antenna (the diameter of its rings is 600 mm).

[0110] These two antenna supports will have bases 10 and rings 20, 20A, 20B of different dimensions. Their belts and encoder strips will also be of different lengths.

[0111] However, all other components of these two antenna mounts can be identical. They can therefore use the same rollers, cassettes, motors and pulleys, and encoder readers.

[0112] According to a preferred variant, the diameters of the drive pulleys may differ from one antenna mount to another, thus maintaining the same reduction ratio and therefore the same control software for both antenna mounts. It can be anticipated that the control software parameters will vary to account for the fact that the encoder will have a different resolution.

[0113] Another advantage is ensuring sufficient belt winding around the drive pulley. Indeed, the larger the diameter of the sprocket 20, the greater the inertia (while maintaining the same sprocket cross-section), which implies generating a higher drive torque.

[0114] The heights of these two antenna supports will then be the same, which will minimize the aerodynamic profile and therefore the drag generated by these two antenna supports.

[0115] The present invention is in no way limited to the embodiment described and represented, but a person skilled in the art will be able to make any variation in accordance with the invention.

[0116] Thus, if in the example described and illustrated the belt is solid, so that there could theoretically be slippage between the belt and the drive pulley under certain operating conditions, one could alternatively use a perforated belt, a toothed ring and a toothed drive pulley, ensuring perfectly synchronous operation of the drive means.

Claims

1. Antenna support (1) comprising: - a base (10), - at least one crown (20) comprising securing means (25) of an antenna element, - means (30) for guiding the crown (20) in rotation around an axis of rotation (A1), - means (40) for driving the crown (20) in rotation around the axis of rotation (A1), and - means (50) for determining the angular position of the crown (20) around the axis of rotation (A1), the guide means (30), the drive means (40) and the determining means (50) are mounted on the base (10) on the outer side of the crown (20), the guide means (30) comprise at least three rollers (311, 312, 321, 322, 331, 332) distributed around the crown (20 ), and wherein there is provided: - at least one second crown (20A) comprising securing means for securing a second antenna element, - second means (30A) for guiding the second crown (20A) in rotation around the axis of rotation (A1), - second means (40A) for driving the second crown (20A) in rotation around the axis of rotation (A1), and - second means for determining the angular position of the second crown (20A) around the axis of rotation (A1), - at least a third crown (20B) comprising securing means for securing a third antenna element, - third means (30B) for guiding the third crown (20B) in rotation around the axis of rotation (A1), - third means (40B) for driving the third crown (20B) in rotation around the axis of rotation (A1), and - third means for determining the angular position of the third crown (20B) around the axis of rotation (A1), wherein the second guide means (30A), the second drive means (40A) and the second determination means are mounted on the base (10) on the outer side of the second crown (20A), and wherein the third guide means (30B), the third drive means (40B) and the third determination means are mounted on the base (10) on the outer side of the third crown (20B).

2. Antenna support (1) according to the preceding claim, wherein the guide means (30) comprise six rollers (311, 312, 321, 322, 331, 332) distributed in pairs on frames (313, 323, 333) mounted on the base (10).

3. Antenna support (1) according to the preceding claim, wherein each frame (313, 323, 333) is pivotally mounted on the base (10), around a pivot axis (A2) parallel to the axis of rotation (A1).

4. Antenna support (1) according to one of the two preceding claims, wherein one of the frames (333) is mounted so as to be able to move in translation on the base (10) along an inclined or orthogonal axis (A5) relative to the axis of rotation (A1), said frame (333) being biased towards the crown (20) by an elastic return system (340).

5. Antenna support (1) according to one of the preceding claims, wherein the drive means (40) comprise a motor (410) which drives a belt (450) wound around the crown (20) .

6. Antenna support (1) according to the preceding claim, wherein the belt (450) is entirely metallic.

7. Antenna support (1) according to one of the two preceding claims, wherein the drive means (40) comprise two return pulleys (420, 430) located on either side of the belt (450), between the motor (410) and the crown (20).

8. Antenna support (1) according to the preceding claim, wherein at least one of the return pulleys (430) is mounted to move in translation on the support (10) along an axis (A6) orthogonal to the axis of rotation (A1) and is biased against the belt (450) by a tensioning system (440).

9. Antenna support (1) according to one of the preceding claims, wherein the determining means (50) comprise an encoder strip (530) wound around the crown (20), and two encoder readers (510 , 520) fixed to the support (10) and angularly separated from each other around the axis of rotation (A1).

10. Set of two antenna supports (1) according to one of the preceding claims, wherein each crown of one of the antenna supports (1) has a different diameter from that of each crown of the other of the antenna supports (1), and wherein the guide means (30), part of the drive means (40) and part of the determination means (50) are identical in the two antenna supports (1).

11. Vehicle comprising means of propulsion, an antenna and an antenna support according to one of claims 1 to 9.

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