EP3474374B1 - Dispositif d'antenne pour signaux satellites polarisés circulairement sur un véhicule - Google Patents

Dispositif d'antenne pour signaux satellites polarisés circulairement sur un véhicule Download PDF

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Publication number
EP3474374B1
EP3474374B1 EP18201246.8A EP18201246A EP3474374B1 EP 3474374 B1 EP3474374 B1 EP 3474374B1 EP 18201246 A EP18201246 A EP 18201246A EP 3474374 B1 EP3474374 B1 EP 3474374B1
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EP
European Patent Office
Prior art keywords
antenna
director
antenna arrangement
accordance
directors
Prior art date
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EP18201246.8A
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German (de)
English (en)
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EP3474374A1 (fr
Inventor
Stefan Lindenmeier
Heinz Lindenmeier
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Fuba Automotive Electronics GmbH
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Fuba Automotive Electronics GmbH
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Publication of EP3474374A1 publication Critical patent/EP3474374A1/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • 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
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/147—Reflecting surfaces; Equivalent structures provided with means for controlling or monitoring the shape of the reflecting surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/005—Patch antenna using one or more coplanar parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/28—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
    • H01Q9/0435—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave using two feed points

Definitions

  • the invention relates to an antenna arrangement for receiving circularly polarized satellite radio signals, in particular for satellite radio navigation.
  • Satellite radio signals are usually transmitted with circularly polarized electromagnetic waves and are used for all known satellite navigation systems.
  • Modern navigation systems provide, in particular for global accessibility in connection with high navigation accuracy in mobile navigation, to evaluate the radio signals received from several satellite navigation systems at the same time.
  • GNSS Global Navigation Satellite System
  • Satellite antennas for navigation on vehicles are usually on the electrically conductive outer skin of the Vehicle body built up.
  • Circularly polarized satellite receiving antennas are used, such as those from the publications DE-A-10 2009 040 910 , DE-A-40 08 505 and DE-A-101 63 793 are known.
  • Antennas which are particularly suitable for installation on vehicles are those which are characterized by a low overall height in connection with low-cost manufacturability. This includes, for example, those from the Pamphlet DE-A-10 2009 040 910 known circular, polygonal or square ring line antenna designed as a resonance structure with a small structural volume, which is particularly required for mobile applications.
  • the antenna has a necessary conductive footprint of relatively small size and is very low with a height of less than one tenth of the free space wavelength.
  • Patch antennas are known according to the prior art as further antennas for satellite navigation on vehicles, but these are less efficient in terms of reception at a low elevation angle.
  • One of the challenges for satellite antennas for GNSS is the requirement for a large frequency bandwidth, which, for example, in GPS is through the frequency band L1 with the center frequency 1575 MHz (required bandwidth approx. 80 MHz) and the frequency band L2 with the center frequency 1227 MHz (required bandwidth approx. 53 MHz) is specified. This requirement is covered, for example, by separate antennas assigned to one of the two frequency bands L1 or L2, or by an antenna comprising both frequency bands.
  • Prior art antennas of this type are known as patch antennas. However, these are less efficient in terms of reception at a low elevation angle. This disadvantage is partially remedied by ring line antennas, such as those in the DE-A-10 2009 040 910 are described. However, it is also desirable for such antennas to improve the cross-polarization distance, in particular in the area of low elevation angles.
  • Satellite antennas are usually set up on horizontal surfaces of the electrically conductive outer skin of a vehicle.
  • the immediate vicinity of the upper edge of the cutout of the rear window - that is, the rear edge of the roof - is often specified as a preferred location of such a satellite receiving antenna on the electrically conductive vehicle roof.
  • the vehicle roof is curved and sloping towards the edge of the window, so that the satellite antenna is not set up on an azimuthally flat and completely horizontal conductive surface.
  • This disturbance of the reception properties of the satellite antenna always arises in those cases in which the antenna is partially built in the vicinity of the edge area of the horizontal body surface.
  • the US 2013/0500371 A1 discloses an antenna arrangement with a receiving antenna which is surrounded by a plurality of parasitic elements in the form of directors or reflectors, the latter being each provided with a plurality of switches in order to change the directional characteristic of the antenna.
  • the EP 0 340 404 A2 discloses L-shaped parasitic elements for receiving circularly polarized waves.
  • an antenna arrangement (1) for receiving circularly polarized satellite radio signals with free space wavelength ⁇ and frequency f comprises at least one circularly polarized satellite receiving antenna (2) positioned over an electrically conductive base surface (3), in particular for satellite navigation with a relative antenna height ha / ⁇ ⁇ 0.15, whose floor plan is a Circle K is inscribed around its phase center PZ with the relative antenna radius ra / ⁇ ⁇ 0.15.
  • a director (4) which comprises a horizontal electrical conductor (5) with two conductor ends (11) which is guided over a director length Ld at a director height hd above the conductive base area (3), at least approximately a lateral surface Mz of a cylinder oriented perpendicular to the conductive base area with a cylinder radius rz and a central axis Z through the phase center PZ of the satellite receiving antenna (2), the horizontal electrical conductor (5) being angled at its two conductor ends (11) and from there as vertical conductor (6) runs towards the conductive base surface (3) and is connected to it in an electrically conductive manner.
  • the director (4) can design the director length Ld, the director height hd and the vertical conductor (6) be matched in such a way that its natural resonance frequency is set in the frequency vicinity of the frequency f.
  • the elongated horizontal electrical conductor 5 is either curved in a plan view, or is straight-lined in the manner of a secant, as it approaches the curved lateral surface Mz of the cylinder.
  • the director length Ld is selected to be somewhat shorter than the resonance length, i.e. about 90% of half the free space wavelength ⁇ and the cylinder radius rz about 20% of the free space wavelength ⁇ .
  • At least three directors 4 are arranged azimuthally uniformly around the satellite receiving antenna 2 and the cylinder radius rz is chosen to be no more than half a free space wavelength.
  • the at least one director 4 for targeted non-uniform change in the horizontal directional characteristic in one Distance of not more than half a free space wavelength ⁇ from the phase center PZ is appropriately positioned azimuthally.
  • an electrically conductive ground plate 3a resting on the electrically conductive outer skin of the vehicle as a mechanical support for the satellite receiving antenna 2 and the at least one director 4, on which the ground points are formed for the electrically effective connection of the director 4 to the conductive base area 3 are.
  • the director 4 is designed in the form of a wire.
  • the ground plate 3a is at least partially designed from an electrically conductive sheet metal surface, and the director 4 as sheet metal strip 21 is cut out of this sheet metal surface except for a connecting web 26 as a ground point 8 and bent out of the sheet metal surface by the bending angle 10 is.
  • At least two directors 4 are arranged closely adjacent to one another along the cylinder jacket Mz and the adjacent conductor ends 11 of the elongated horizontal electrical conductors 5 are capacitively coupled to one another.
  • the satellite receiving antenna 2 is completely surrounded in azimuthally symmetrical form by directors 4 that are adjacent to one another and capacitively coupled with one another with regard to their conductor ends 11.
  • the directors 4 consist of electrically conductive sheet metal and are each angularly shaped and bent at the conductor ends 11 of the elongated electrical conductor 5 in such a way that a sheet metal flag 12 is formed in each case and by the flag surfaces that are parallel to one another neighboring directors 4 the capacitive coupling is effected.
  • the directors 4 arranged in a ring are combined to form a mechanically coherent ring made of sheet metal, the connection of the directors 4 to one another being provided via, in particular, short connecting webs 26, which are placed on the ground plate 3a and electrically connected to it at the ground points 8 are conductively connected.
  • the satellite receiving antenna 2 consists of a circularly polarized loop antenna 13 with a relative height ha / ⁇ 0.1 and its vertical projection is inscribed in a circle with the relative antenna radius ra / ⁇ ⁇ 0.13 around its phase center PZ and the relative director length Ld / ⁇ ⁇ 0.3 and the relative director height hd / ⁇ ⁇ 0.07 and the relative cylinder radius are selected in the range rz / ⁇ ⁇ 0.2.
  • the satellite receiving antenna 2 is formed as a circularly polarized patch antenna 14.
  • An antenna arrangement 1 according to the invention has the advantage that when using a predetermined satellite receiving antenna 2 suitable for receiving the positioning satellites but not specified in more detail, the radiation properties can be improved in a targeted manner by the design and placement of the directors 4 according to the invention with regard to gain and cross-polarization suppression .
  • a particular advantage of the invention is also that it makes it possible, in the case of an azimuthally non-uniform environment of the antenna arrangement 1, to remedy the disruption of its omnidirectional radiation pattern with regard to gain and cross-polarization distance caused thereby.
  • an antenna arrangement 1 Another advantage of an antenna arrangement 1 according to the invention is that the directors 4 can be manufactured and attached particularly easily, which also enables them to be implemented using simple bent sheet-metal or wire structures.
  • This has a relative antenna height ha / ⁇ ⁇ 0.15 and is inscribed with its vertical projection in a circle K with the relative antenna radius ra / ⁇ ⁇ 0.15 around its phase center PZ.
  • At least one director 4 which is formed from a substantially elongated horizontal electrical conductor 5 and which over the director length Ld below the director height hd above the conductive base 3 approximately along the lateral surface of a vertically oriented cylinder with a cylinder radius rz and a central axis Z is passed through the phase center PZ of the satellite antenna 2.
  • the horizontal electrical conductor 5 is kinked at both ends of the length L and runs as a vertical conductor 6 towards the conductive base surface 3 and is conductively connected to it.
  • the relative director length Ld is selected in the range 0.2 ⁇ Ld / ⁇ ⁇ 0.4.
  • the relative director height hd is selected in the range 0.03 ⁇ hd / ⁇ ⁇ 0.15.
  • the relative cylinder radius is selected in the range 0.15 ⁇ rz / ⁇ ⁇ 0.4.
  • the invention is based on a circularly polarized satellite receiving antenna 2 located above an electrically conductive base area 3, the relative antenna height ha / ⁇ of which, based on the free space wavelength ⁇ , is less than 0.15.
  • This extremely small height ha of the antenna is associated with the problematic property that its radiation gain decreases very quickly towards smaller elevation angles. This is also associated with an increased decrease in the cross-polarization distance.
  • This effect can be mitigated by the presence of the directors 4 to such an extent that a satellite receiving antenna 2 with the specified structural volume on the electrically conductive outer skin of a vehicle 7 can also be used for qualified location determination with the aid of satellite navigation.
  • satellite reception signals are to be evaluated for the navigation, which are incident at the low elevation angle of 20 ° up to an elevation angle of 5 °.
  • the extremely strong drop in antenna gain at such low elevation angles for the desired polarization direction of such a low one Satellite receiving antenna 2 over a conductive base 3 is based on the weakness of the horizontal component of its electric radiation field. According to the invention, this weakness is alleviated by the use of the directors 4 around the satellite receiving antenna 2 and the antenna gain is increased for low elevation angles.
  • the directors form an arch or a (U-shaped) gate in relation to the base area (cf. Fig. 1 ), which consists of the vertical conductor 5 and the two vertical conductors 6.
  • the mode of operation of the directors 4 can be checked for plausibility on the basis of the spatial representation of the antenna arrangement 1 according to the invention in FIG Fig. 1 and their top view in the Figures 1a and 2 explain approximately.
  • the azimuthally almost complete encompassing of the satellite receiving antenna 2 with directors 4 leads to the desired increase in the antenna gain in the case of omnidirectional radiation.
  • the satellite receiving antenna 2 designed for circular polarization excites the electrical conductors of the directors 4 with the currents flowing on it.
  • the conductor ends 11 of the horizontal electrical conductors 5 are each connected to a ground point 8 with the conductive base 3 via the vertical conductors 6.
  • secondary currents are formed on the electrically excited director 4 and in particular also on the horizontal electrical conductor 5, which, with a suitable choice of the director length in the range 0.2 ⁇ Ld / ⁇ ⁇ 0.45, the director height in the range 0.03 ⁇ hd / ⁇ ⁇ 0.15 and the cylinder radius in the range 0.15 ⁇ rz / ⁇ ⁇ 0.5, which determines the distance between the directors 4 and the center Z of the antenna arrangement 1, generate a radiation field. This is superimposed on the radiation field of the satellite receiving antenna 2 in such a way that the desired increase in the antenna gain occurs, in particular for low elevation angles.
  • the small selected deviation of the satellite frequency f from the natural resonance frequency of the director 4 is the reason for the associated increase in the currents on the director 4 and, in combination with the appropriately set cylinder radius rz, the resulting, in relation on the phase position constructive superposition of the director radiation field with the radiation field of the satellite receiving antenna 2 in the sense of the task to be solved.
  • the horizontal electrical conductors 5 above the electrically conductive base 3 below the director height hd each form an electrical line terminated at both conductor ends 11 via the vertical conductor 6 with the characteristic impedance ZL, the size of which depends on the conductor width 27 or the sheet metal strip width 21 and the conductor spacing 28 of the horizontal electrical conductor 5 is given by the conductive base 3.
  • the wave impedance ZL can be varied within wide limits.
  • a fine adjustment of the distance rz of the director 4 from the center Z as well as the choice of a suitable wave impedance ZL and the self-inductance of the vertical conductors 6 enables the optimization of the radiation pattern of the antenna arrangement 1 in terms of the object of the invention.
  • the ground plate 3a resting on the outer skin of the vehicle 7 is designed as a mechanical support for the satellite receiving antenna 2 and the directors 4 and is made of sheet metal.
  • a particular advantage here is the possibility, according to the invention, of cutting the directors 4 from the sheet metal and bending them out by the bending angle 10. The cutting and bending processes required for this can be carried out extremely inexpensively in mass production with very good reproducibility.
  • the non-uniform change in the horizontal directional characteristic can be counteracted with a specifically positioned director 4.
  • This measure according to the invention is particularly helpful when choosing the preferred installation spaces Br1, Br2, and Br6 on the vehicle roof 16, in which due to the abrupt breaking off of the conductive base surface 3 on the rear roof edge 18 at the upper edge of the rear window 15 and the curvature that is often present there of the vehicle roof 16, the radiation pattern of a satellite receiving antenna 2 is generally severely impaired.
  • the installation spaces are more compact and the radiation characteristics are impaired by electromagnetic coupling.
  • the satellite receiving antenna 2 for GNSS is attached in an arrangement according to the invention with two opposing directors 4 on the installation space Br2 and the satellite receiving antenna 23 for radio reception at approximately 2.3 GHz on the installation space Br6. Both antennas are designed as ring line antennas 13 in the example. It is shown to be very advantageous here that the strict requirements for the radiation characteristics of the satellite broadcast receiving antenna 23 are not impaired by the presence of the directors 4 according to the invention.
  • the secondary currents which the satellite broadcast antenna 23 causes on the directors 4 are sufficiently small that their effect on the radiation characteristics of the satellite broadcast antenna 23 is negligible. This effect is pronounced in such a way that the disturbance of the radiation properties of the satellite broadcast antenna 23 in Fig. 11 is small even when the satellite receiving antenna 2 for GNSS is completely surrounded by directors 4.
  • These secondary currents generate different voltages on the inductive effects of the adjacent vertical electrical conductors 6, the difference being via the capacitive Coupling produces the desired effect of improving the cross polarization distance.
  • the directors 4 are cut out of the sheet-like ground plate 3a except for the short connecting webs 26 and bent out of the sheet-metal ground plate 3a along the bending line 24, the bending angle 10 being selected to be 90 °.
  • the conductor ends 11 of the elongated electrical conductor 5 are shaped flat and angular in such a way that a sheet metal lug 12 is formed in each case.
  • the sheet metal lugs 12 are bent radially outward - in relation to the center Z - in such a way that the surfaces of two adjacent sheet metal lugs 12 are aligned essentially parallel to one another and thus the increased capacitive coupling is achieved.

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)
  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)

Claims (15)

  1. Dispositif d'antenne (1) pour la réception de signaux radio satellite à polarisation circulaire avec la longueur d'onde en espace libre λ et la fréquence f, comprenant au moins une antenne de réception par satellite (2) à polarisation circulaire positionnée au-dessus d'une surface de base électriquement conductrice (3), en particulier pour la navigation par satellite, avec une hauteur d'antenne relative ha/λ < 0,15, dont le plan de base est inscrit dans un cercle K autour de son centre de phase PZ avec le rayon d'antenne relatif ra/λ < 0,15,
    comprenant les éléments suivants :
    il est prévu un directeur (4) qui comprend un conducteur électrique horizontal (5) ayant deux extrémités de conducteur (11), qui est guidé sur une longueur de directeur Ld à une hauteur de directeur hd au-dessus de la surface de base conductrice (3), à savoir au moins approximativement le long d'une surface enveloppe Mz d'un cylindre orienté perpendiculairement à la surface de base conductrice et ayant un rayon de cylindre rz et un axe central Z passant par le centre de phase PZ de l'antenne de réception par satellite (2), le conducteur électrique horizontal (5) étant coudé à ses deux extrémités de conducteur (11) et s'étendant à partir de là sous forme de conducteur vertical (6) respectif vers la surface de base conductrice (3) et étant relié de manière électriquement conductrice à celle-ci ;
    grâce à la conception de la longueur de directeur Ld, de la hauteur de directeur hd et des conducteurs verticaux (6), le directeur (4) est adapté de telle sorte que sa fréquence de résonance propre soit établie au voisinage de la fréquence f.
  2. Dispositif d'antenne (1) selon la revendication 1,
    caractérisé en ce que
    la longueur de directeur est choisie dans la plage 0,2 < Ld /λ < 0,45, la hauteur de directeur hd est choisie dans la plage 0,03 < hd /λ < 0,15, et le rayon de cylindre est choisi dans la plage 0,15 < rz/λ < 0,5.
  3. Dispositif d'antenne (1) selon la revendication 1 ou 2,
    caractérisé en ce que
    le conducteur électrique horizontal (5) est de conception rectiligne, les deux conducteurs verticaux (6) étant en particulier disposés dans la zone de la surface enveloppe Mz.
  4. Dispositif d'antenne (1) selon l'une des revendications 1 à 3,
    caractérisé en ce que
    la longueur de directeur Ld est choisie pour être inférieure à environ 90 % de la moitié de la longueur d'onde en espace libre λ, et le rayon de cylindre rz est choisi pour être d'environ 20 % de la longueur d'onde en espace libre λ.
  5. Dispositif d'antenne (1) selon l'une des revendications 1 à 4,
    caractérisé en ce que
    pour réduire la polarisation croisée, à des angles d'élévation faibles, sur la totalité de la plage d'angles azimutaux, au moins trois directeurs (4) sont disposés en uniformité azimutale autour de l'antenne de réception par satellite (2), en particulier le rayon de cylindre rz étant choisi pour ne pas être supérieur à la moitié d'une longueur d'onde en espace libre.
  6. Dispositif d'antenne (1) selon l'une des revendications 1 à 5,
    caractérisé en ce que
    afin de compenser une altération du diagramme de directivité azimutale, causée par un environnement non uniforme par secteur azimutal, ainsi que de la distance de polarisation croisée, en particulier à des angles d'élévation autour de 30°, ledit au moins un directeur (4) est positionné à une distance par rapport au centre de phase PZ qui n'est pas supérieure à la moitié de la longueur d'onde en espace libre λ, en vue d'une modification non uniforme ciblée de la directivité horizontale.
  7. Dispositif d'antenne (1) selon l'une des revendications 1 à 6,
    caractérisé en ce que
    il est prévu un plan de masse électriquement conducteur (3a) à titre de support mécanique de l'antenne de réception par satellite (2) et dudit au moins un directeur (4), sur lequel des points de masse (8) sont formés pour la connexion électriquement efficace du directeur (4).
  8. Dispositif d'antenne (1) selon la revendication 7,
    caractérisé en ce que
    le plan de masse (3a) est formé au moins partiellement d'une surface de tôle électriquement conductrice, et le directeur (4) est découpé sous forme de bande de tôle (21) dans cette surface de tôle, à l'exception d'une barrette de liaison (26) servant de point de masse (8), et est plié hors de la surface de tôle selon un angle de pliage (10).
  9. Dispositif d'antenne (1) selon l'une des revendications 1 à 7,
    caractérisé en ce que
    le directeur (4) est réalisé en forme de fil.
  10. Dispositif d'antenne (1) selon l'une des revendications 1 à 9,
    caractérisé en ce que
    pour l'augmentation par secteur azimutal du gain d'antenne, à des angles d'élévation faibles, au moins deux directeurs (4) sont disposés de manière étroitement adjacente l'un à l'autre le long de l'enveloppe cylindrique Mz, et les extrémités de conducteur mutuellement adjacentes (11) des conducteurs électriques horizontaux (5) sont couplées l'une à l'autre par voie capacitive.
  11. Dispositif d'antenne (1) selon l'une des revendications 1 à 10,
    caractérisé en ce que
    pour l'augmentation, indépendante de l'azimut, du gain de l'antenne et pour l'amélioration supplémentaire de la distance de polarisation croisée, l'antenne de réception par satellite (2) est complètement entourée de manière symétrique en azimut par des directeurs (4) qui sont adjacents les uns aux autres et qui sont couplés les uns aux autres par voie capacitive par rapport à leurs extrémités de conducteur (11).
  12. Dispositif d'antenne (1) selon l'une des revendications 1 à 8 et 10 à 11,
    caractérisé en ce que
    il est prévu plusieurs directeurs (4) qui sont constitués d'une tôle électriquement conductrice et qui sont chacun mis en forme polygonale et pliés aux extrémités (11) du conducteur électrique allongé (5), de manière à former une patte de tôle respective (12), un couplage capacitif étant effectué par des surfaces de patte mutuellement parallèles des directeurs (4) mutuellement adjacents respectifs.
  13. Dispositif d'antenne (1) selon la revendication 12,
    caractérisé en ce que
    les directeurs (4) sont réunis de manière cohérente pour donner un anneau de tôle mécaniquement cohérent, la liaison des directeurs (4) étant établie par des barrettes de liaison (26) qui sont placées sur un plan de masse (3a) et qui sont reliées de manière électriquement conductrice à celui-ci au niveau de points de masse (8).
  14. Dispositif d'antenne (1) selon les revendications 1 à 13,
    caractérisé en ce que
    l'antenne de réception par satellite (2) est une antenne à ligne annulaire (13) à polarisation circulaire ayant une hauteur relative ha/λ ∼ 0,1, et sa projection verticale est inscrite dans un cercle ayant le rayon d'antenne relatif ra/λ ∼ 0,13 autour de son centre de phase PZ, et
    la longueur de directeur est choisie dans la plage Ld /λ ∼ 0,3,
    la hauteur de directeur est choisie dans la plage hd /λ ∼ 0,07, et
    le rayon de cylindre est choisi dans la plage rz/λ ∼ 0,2.
  15. Dispositif d'antenne (1) selon l'une des revendications 1 à 13,
    caractérisé en ce que
    l'antenne de réception par satellite (2) est réalisée sous forme d'antenne patch (14) à polarisation circulaire.
EP18201246.8A 2017-10-19 2018-10-18 Dispositif d'antenne pour signaux satellites polarisés circulairement sur un véhicule Active EP3474374B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017009758.5A DE102017009758A1 (de) 2017-10-19 2017-10-19 Antennenanordnung für zirkular polarisierte Satellitenfunksignale auf einem Fahrzeug

Publications (2)

Publication Number Publication Date
EP3474374A1 EP3474374A1 (fr) 2019-04-24
EP3474374B1 true EP3474374B1 (fr) 2021-05-26

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US (1) US10833412B2 (fr)
EP (1) EP3474374B1 (fr)
JP (1) JP2019092151A (fr)
DE (1) DE102017009758A1 (fr)

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Publication number Priority date Publication date Assignee Title
WO2021033253A1 (fr) * 2019-08-20 2021-02-25 三菱電機株式会社 Dispositif d'antenne
CN112201953B (zh) * 2020-11-03 2023-05-09 上海安费诺永亿通讯电子有限公司 卫星通信***和/或导航***天线
CN112635977A (zh) * 2020-12-28 2021-04-09 无锡华信雷达工程有限责任公司 一种uhf频段高增益左旋圆极化天线

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US20190260129A1 (en) 2019-08-22
DE102017009758A1 (de) 2019-04-25
US10833412B2 (en) 2020-11-10
EP3474374A1 (fr) 2019-04-24

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