EP3506429A1 - Quasioptischer strahlformer, entsprechende elementarantenne und plattform, entsprechendes antennensystem und kommunikationsverfahren - Google Patents

Quasioptischer strahlformer, entsprechende elementarantenne und plattform, entsprechendes antennensystem und kommunikationsverfahren Download PDF

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Publication number
EP3506429A1
EP3506429A1 EP18215647.1A EP18215647A EP3506429A1 EP 3506429 A1 EP3506429 A1 EP 3506429A1 EP 18215647 A EP18215647 A EP 18215647A EP 3506429 A1 EP3506429 A1 EP 3506429A1
Authority
EP
European Patent Office
Prior art keywords
quasi
antenna
layer
frequency
optical beamformer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18215647.1A
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English (en)
French (fr)
Other versions
EP3506429B1 (de
Inventor
Friedman Tchoffo Talom
Bertrand BOIN
Guillaume Fondi de Niort
Hervé Legay
Etienne Girard
Mauro Ettorre
Ronan Sauleau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre National de la Recherche Scientifique CNRS
Universite de Rennes 1
Thales SA
Original Assignee
Centre National de la Recherche Scientifique CNRS
Universite de Rennes 1
Thales SA
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Publication of EP3506429A1 publication Critical patent/EP3506429A1/de
Application granted granted Critical
Publication of EP3506429B1 publication Critical patent/EP3506429B1/de
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    • 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
    • H01Q19/06—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 refracting or diffracting devices, e.g. lens
    • H01Q19/062—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 refracting or diffracting devices, e.g. lens for focusing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0031—Parallel-plate fed arrays; Lens-fed arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/064—Two dimensional planar arrays using horn or slot aerials
    • 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
    • H01Q1/288—Satellite antennas
    • 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
    • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
    • H01Q15/08—Refracting or diffracting devices, e.g. lens, prism formed of solid dielectric material
    • 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
    • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
    • H01Q15/10—Refracting or diffracting devices, e.g. lens, prism comprising three-dimensional array of impedance discontinuities, e.g. holes in conductive surfaces or conductive discs forming artificial dielectric

Definitions

  • the present invention relates to a quasi-optical beamformer for an elementary telecommunications antenna, in particular a satellite antenna and preferably in the Ka band.
  • the invention also relates to an elementary antenna comprising such a beamformer, to an antenna system comprising such an elementary antenna, a platform, in particular terrestrial, aerial or space, comprising at least one elementary antenna or an antennal system mentioned above, and a telecommunication method between two stations using the aforementioned elementary antenna or antennal system.
  • obtaining good quality communication involves performance of the electromagnetic waves produced by the antennal system used in the communication in terms of gain and level of the secondary lobes (ratio of the intensity of the side lobes and intensity of the main lobe).
  • the electromagnetic band Ka two distinct frequency bands are involved. Indeed, in transmission, the electromagnetic waves of the Ka band have a frequency between 27.5 GigaHertz (GHz) and 31 GHz while in reception, the electromagnetic waves of the Ka band have a frequency between 17.3 GHz and 21.2 GHz. In addition, the polarizations of the transmitting and receiving waves are generally opposite circular type or not.
  • an electronic scanning antenna comprising two antenna panels disjoined respectively for the emission of a wave at a frequency around 30 GHz and for the reception of a wave at a frequency around 20 GHz.
  • the electronic scanning antenna obtained has a large bulk corresponding to the radiating surfaces of each of the modes. operating (transmission / reception).
  • the effectiveness of such an antenna is often insufficient because are most often used patch unit antennas.
  • the antenna obtained has a large footprint because of the use of a polarizer and especially two panels used for transmission and reception.
  • an antenna structure that can receive waves at a frequency distinct from the waves emitted while being compact has been proposed in the application.
  • FR 3 013 909 A1 Such an antenna structure is based on the implementation of a radiating guide horn loaded with dielectric and incorporating a polarizer for generating the necessary circular polarization.
  • the invention also relates to an elementary antenna comprising at least one radiating element and a quasi-optical beamformer as described above, the output of the quasi-optical beamformer being adapted to feed the input of said at least one element beaming.
  • the invention also relates to an antenna system comprising at least one elementary antenna as previously described.
  • the invention also relates to a platform, particularly an aerial platform, comprising at least one elementary antenna as previously described or an antenna system as previously described.
  • the subject of the present invention is also a telecommunications method, in particular by satellite, between two stations, the method comprising the use of at least one elementary antenna as previously described or an antenna system as described above.
  • the elementary antenna A according to the present invention comprises a quasi-optical beamformer 10, or FFQO, whose exemplary embodiments are respectively represented on the Figures 1 and 2 .
  • the waveguide 12 with parallel plates is a transmission guide comprising two metal plates stacked spaced l one of the other according to a layer thickness E C and extending in two longitudinal X and transverse Y directions.
  • Such a waveguide 12 PPW is able to concentrate the energy provided by a power source 16 to produce one or more electromagnetic waves.
  • the waveguide 12 PPW comprises a plane focusing structure corresponding to a slice 14 of graded index lens (ie having a refractive index varying as a function of the position within the lens) whose thickness E L extends in the direction Z orthogonal to the XY plane and whose rear face rests on one of the metal plates of the waveguide 12.
  • graded index lens ie having a refractive index varying as a function of the position within the lens
  • slice (14) is meant a portion of thickness E L taken according to a meridian sampling plan in an ellipsoid of revolution or a half-ellipsoid of revolution. Otherwise, says the contour according to the thickness E L of the slice is elliptical, respectively half-elliptical.
  • the index gradient lens wafer 14 of the first layer C 1 rests on the metal plate 15 common to both the first waveguide 12 1 of the first layer C 1 and to the second waveguide 12 2 of the first layer C 2 , this common metal plate corresponding to the polarizer of the quasi-optical beamformer 10 according to the present invention.
  • the index gradient lens wafer 14 is oriented in the longitudinal direction X of diffusion of the energy supplied by the source 16 towards a radiating element 18 or a plurality of M identical radiating elements 18 contiguous to each other in the direction transverse Y (with M ⁇ 2), so that the diameter D of the index gradient lens, opposite to the pole P of the index gradient lens wafer 14, is in contact with the input of a plurality of radiating elements 18.
  • the elementary antenna A according to the embodiments of the Figures 1 and 2 , corresponds to a radiating line of identical radiating elements 18 contiguous.
  • Each radiating element 18 has a parallelepipedal shape, and comprises, at the level of the diameter D of the index gradient lens wafer 14, a first polarizing portion 20 in which the polarizer 15 of the quasi-optical beamformer 10 is extended according to the invention, the polarizer 15 being adapted to deliver for each layer C 1 or C 2 a plane wave polarized circularly from the spherical electromagnetic wave delivered at the output of the source 16, and a second portion or output 22 dedicated to the transmission / reception as such.
  • a cylindrical radiating element 18 shown in connection with the figure 4 , detailed later, is also suitable for use according to the present invention.
  • the thickness E L of the index gradient lens wafer 14 is less than or equal to the thickness E C of the waveguide 12 with parallel plates, which makes it possible to guarantee a compactness of each planar layer C 1 or C 2 .
  • Such an index gradient lens slice 14 makes it possible to focus the spherical radiofrequency wave emitted by the source 16 by transforming it into a plane wave in the waveguide 12 PPW. Since the law of the index in the index gradient lens slice is by definition discrete (and not continuous), the index gradient lens delivers a focal task that allows a large misalignment range.
  • the quasi-optical beamformer 10 comprising, within a layer C 1 or C 2, such a combination is therefore capable of concentrating the energy and focusing the wave produced within a compatible wideband parallel guide 12 of the plurality of radiating elements 18 while avoiding the machining difficulties of the solutions of the prior art.
  • the implementation of the index gradient lens wafer 14 allows a significant mass reduction of the order of two to three times lower than the solutions of the prior art.
  • the supply of element (s) radiating (s) 18 according to the present invention has a simplification of implementation to reduce the impact of machining tolerances on performance inherent solutions of the prior art.
  • graded index lenses are suitable for being used to extract the slice 14 according to the present invention.
  • the wafer 14 has a contour according to the elliptical, semi-elliptical, or even hemispherical thickness as shown in the examples of FIGS. Figures 1 and 2 .
  • the half-elliptical or hemispherical shapes make it possible to limit the dimensions of the quasi-optical beamformer 10
  • the material used to form the graded index lens is for example dielectric or metallic.
  • the slice 14 of lens is hemispherical inhomogeneous index gradient type of fish eye Maxwell (HMFE of the English "half Maxwell's fish-eye").
  • HMFE hemispherical inhomogeneous index gradient type of fish eye Maxwell
  • the lens slice 14 HMFE is taken in a meridian plane of the hemisphere of the lens (ie hemisphere plane comprising the pole P), and adapted to be placed in each waveguide 12 1 and 12 2 plates parallel.
  • the lens wafer 14 HMFE is formed of a plurality of N materials 14 1 to 14 N , having discrete discrete dielectric characteristics, and distributed continuously, successively, and concentrically according to the radius R of the wafer, with 3 ⁇ N ⁇ 10.
  • the dielectric constants ⁇ 1 to ⁇ N respectively associated with each stratum being in accordance with a predetermined dielectric distribution, their value being for example between two and four, and decreasing from 1 to N for the corresponding concentric strata from the center O to the P pole of the HMFE lens wafer.
  • the quasi-optical beamformer forming layer structure 10 is easily scalable, ie suitable for adapting to the number M of elements radiators 18 considered by modifying only the diameter D of the HMFE lens to be designed to extract the slice or slices used according to the present invention.
  • an increase in the number of radiating elements 18 is necessary and in order to dimension the corresponding quasi-optical beamformer supply 10 according to the invention. is operated so as to proportionally increase the lens diameter D HMFE and, in the direction Y, the waveguide width 12 containing the lens slice HMFE used.
  • the HMFE lens wafer 14 C1 , 14 C2 of each layer C 1 and C 2 is formed of a diffractive dielectric material having a plurality of orifices H whose density increases concentrically along the radius R of the wafer.
  • the index gradient in terms of the dielectric constant of the HMFE lens wafer 14 is obtained by considering continuously distributed strata successively and concentrically of the same material but having a density of distinct materials per stratum, the material density being increasing the material stratum comprising the pole P to the material stratum comprising the center O of the HMFE lens.
  • the HMFE lens wafer 14 is devoid of dielectric material and formed of a metallic material corresponding to a set of metal pads, for example arranged in the air in place of the orifices H of the figure 2 so as to also obtain an index gradient along the radius R of the slice 14.
  • the quasi-optical beamformer 10 is particularly suitable for use in the electromagnetic band Ka, since it comprises the two superposed layers C 1 and C 2 (in other words two superimposed waveguides 12 1 and 12 2 having a metal plate 15), each layer being adapted to operate according to at least two distinct operating frequencies f 1 and f 2 (ie each layer C 1 and C 2 being at least two-band).
  • each layer C 1 and C 2 is associated with a different operating polarization state so that the quasi-optical beamformer 10 is adapted to output a circularly polarized wave when the two layers C 1 and C 2 are simultaneously activated, a distinct circular polarization state being produced for each layer C 1 and C 2 .
  • the quasi-optical beamformer 10 comprises the polarizer 15 (not shown in FIGS. Figures 1 and 2 ) placed parallel between these two layers C 1 and C 2 and also able to extend, in the direction X in a polarizing portion 20 of each radiating element 18.
  • the quasi-optical beamformer is dual-band and able to implement a distinct linear polarization for each layer C 1 or C 2 if only one layer is activated both selectively by the source 16 (ie excited) or a circular polarization when the two layers C 1 and C 2 are simultaneously activated and circularly polarized distinctly by means of the polarizer 15, which makes it suitable for use in the electromagnetic band Ka, where the dedicated frequencies on transmission and reception are distinct, in particular for a SATCOM satellite application.
  • each layer C 1 or C 2 provides a circular polarization state of its own, for example circular left for C 1 and circular right for C 2 .
  • each C 1 and C 2 layer is adapted to receive two separate radio frequency waves provided by one or the other of the two portions 16 1 and 16 2 of source 16.
  • the two portions 16 1 and 16 2 source operating identically, are each adapted to provide electromagnetic waves according to at least two distinct frequencies, and are each equipped each with a duplexer to select at least the generation of an electromagnetic wave at a first frequency f 1 , dedicated, for example, the emission of the electromagnetic waves of the band Ka, f 1 then being between 27.5 GHz and 31 GHz, or the generation of an electromagnetic wave at a second frequency f 2 , dedicated, for example, to the reception of the electromagnetic waves of the band Ka, f 2 then being between 17.3 GHz and 21.2 GHz.
  • the polarizer 15 is arranged to polarize the waves electromagnetic that the first portion 16 1 of source 16 and the second portion 16 2 of source 16 are adapted to provide so as to supply the radiating element (s) 18.
  • the polarizer 15 itself comprises two unrepresented portions arranged to circularly polarize in a first direction the electromagnetic waves that the first portion 16 1 of source 16 is adapted to emit, and to circularly polarize the waves that the second portion 16 2 of source 16 is able to emit in a direction opposite to the first direction.
  • such a polarizer 15 is for example a polarizer 15 based on a septum.
  • the quasi-optical beamformer 10 is capable of compactly feeding one or more radiating element (s) 18 capable of emitting and / or receiving waves in two polarization states. different, in this case for the example of the figure 1 or from figure 2 , left and right circular polarizations.
  • An antenna system 100 is represented on the figure 3 .
  • the antenna system 100 is an assembly of elementary antennae A (or radiating lines) assembled so as to obtain V lines each grouping M radiating elements 18 identical contiguous.
  • the antennal system 100 is more compact and lightened compared to antenna systems of the prior art. This effect is amplified by the lightness of the power supply of each elementary antenna A, such a corresponding power supply, as described above, to the quasi-optical beamformer 10 according to the invention.
  • each of the first and second source parts 16 1 , 16 2 of the different elementary antennas A 1 to A V are adapted to be connected. to a duplexer not shown to ensure good isolation between the layers C 1 and C 2 of the quasi-optical beamformer 10 according to the present invention.
  • a duplexer is a device allowing the use of the same antenna for transmitting and receiving a signal. Switches inserted between the duplexer and the first and second source portions 16 1 , 16 2 can allow easy selection of the source portion 16 1 , 16 2 and the desired operation for the antenna system 100.
  • each elementary antenna A is associated with a phase control circuit.
  • phase control circuits associated with each of the elementary antennas A for example it is possible to perform a misalignment according to the Z axis in the XZ plane.
  • one or more complementary motorized systems along an axis for example by means of a turntable is associated with the antenna system 100.
  • Such antennal system 100 is advantageously usable in a platform, including land, air or satellite.
  • a platform including land, air or satellite.
  • the compactness and lightness of the antennal system 100 makes it possible to reduce the constraints at the level of implementations of equipment on the platform.
  • the radiating element 18 fed by the quasi-optical beamformer according to the invention is cylindrical and conforms to the object of the application FR 3 013 909 A1 as illustrated by figure 4 .
  • the radiating element 18 comprises a horn 24, a polarizing portion 20 comprising an end 25, dielectric elements 26 and two ports 28, 30 for the waves emitted or received by the radiating element 18.
  • the horn 24 comprises a first transmission-reception part 22 1 able to transmit and receive a wave according to a state of polarization and a second part according to another polarization state 22 2 , distinct from the first transmission-reception part 22 1 .
  • each part 22 1 and 22 2 is respectively associated via the ports 28 and 30 respectively, to the first supply layer C 1 and to the second supply layer C 2 of the quasi-optical beamformer 10 the present invention.
  • the parts 22 1 and 22 2 are adapted to be associated in a single block.
  • Each of the first and second transceiver portions 22 1 , 22 2 is adapted to transmit and receive an electromagnetic wave at a first frequency f 1 or at a second frequency f 2 , the ratio between the second frequency f 2 and the first frequency f 2.
  • frequency f 1 is greater than 1.2, and preferably greater than 1.5.
  • the horn 24 has a cylindrical shape conferring on the emission of the elementary antenna A a broadband character.
  • the band covered by a horn typically extends to 40% on either side of the operating frequency.
  • the first transmission-reception part 22 1 and the second transmission-reception part 22 2 each have the form of a half-disc, the association of the two transmission-reception parts forming the horn 24.
  • a horn sized to operate over a wide frequency band has external dimensions which are constrained by the operating wavelength corresponding to the lowest frequency to be transmitted or received.
  • the inside of it is empty.
  • the interior of the horn 24 is filled with a dielectric material to reduce the physical dimensions of the horn 24.
  • the wavelength in a dielectric material is smaller only in the corresponding wavelength in the air.
  • This dielectric material is a substrate having a permittivity of between two and five depending on the production constraints.
  • the polarizer 15 extends both in the polarizing portion 20 of the radiating element 18 and in the quasi-optical beamformer 10.
  • the polarizer 15 is arranged in such a way as to polarize the waves that the first transmission-reception part 22 1 and the second transmission-reception part 22 2 are suitable for transmitting.
  • the polarizer 15 comprises two parts arranged, not shown, so as to circularly polarize in a first direction the waves that the first transmitting-receiving part 22 1 is able to transmit and circularly polarize the waves that the second transmitting part -reception 22 2 is able to emit in a direction opposite to the first direction.
  • the first sense is the right polarization.
  • such a radiating element 18 conforms to the object of the application FR 3 013 909 A1 is for example suitable for transmitting and / or receiving waves having a polarization circular right at the first frequency f 1 .
  • Such a radiating element 18 is also able to emit and / or receive waves having a left circular polarization at the second frequency f 2 .
  • the polarizer 15 is also part of the horn 24 (i.e. also extends in the horn 24).
  • the constituent elements of the elementary antenna A namely the quasi-optical beamformer 10 and the or the plurality of radiating elements 18 are machined together so as to form a single piece in which the polarizer 15 extends over the entire dimension along the longitudinal direction X of diffusion of the energy supplied by the source (s) 16 towards the radiating element 18 or the plurality of M identical radiating elements 18 contiguous to each other according to the transverse direction Y (with M ⁇ 2).
  • the dielectric elements 26 are inserted in order to reduce the electrical dimension with respect to the wavelength and thus to obtain an elementary antenna A with dimensions enabling the radiating elements 18 to be brought sufficiently close to each other at the same time.
  • the dielectric elements 26 are preferably only located at the accesses 28, 30 as well as in the polarizer 15. As a variant, the dielectric elements 26 are extended in the parts 22 1 and 22 2 .
  • Each access 28, 30 is opposite a transmission-reception part of the horn 24.
  • an access 28 for a left circular polarized wave is therefore provided opposite the first transmission-reception part 22 1 of the horn 24 while an access 30 for a right circular polarized wave is provided next to the second transmitting-receiving part 22 2 .
  • the first transmission-reception part 22 1 receives electromagnetic waves in a state of polarization as soon as the horn 24 is electrically excited. This wave is left circular polarized by the polarizer 15. This wave then passes through the access 28 provided for a left circular polarized wave.
  • a right circular polarized wave passes through the port 30 provided for a right circular polarized wave. This wave then passes through the polarizer 15 before being emitted by the second transmitting-receiving part 22 2 .
  • This transceiver operation can be reversed between ports 28 and 30.
  • a single radiating element 18 makes it possible to provide both the transmission and reception functions, for two frequencies f 1 and f 2 whose ratio is greater than at 1.2. It is a compact circular bi-band cone 24 which makes each element radiate 18 bi-band.
  • each radiating element 18 is able to emit and / or receive waves in two different polarization states, for example left and right circular polarizations.
  • a linearly polarized wave is desired, either the two ports 28, 30 are used simultaneously by applying them, via the layers C 1 and C 2 of the quasi-optical beamformer 10 and the source parts 16 1 and 16. 2 , a certain phase shift as a function of the orientation of the desired polarization, or a single access 28 or 30 is used and only one of the two layers C 1 or C 2 is selectively excited by the source 16.
  • the horn 24 presents alternately a parallelepipedal shape as illustrated on the Figures 1 and 2 previously described.
  • the specific power supply based on the use of the quasi-optical beamformer 10 according to the present invention allows in association with one or more radiating elements 18 such as those of the application FR 3 013 909 A1 or parallelepipedic radiating elements 18 to obtain a very effective antennal system because mainly focusing, with machining constraints and associated implementation costs lowered compared to the power supplies according to the prior art, while ensuring a radiation pattern in accordance with standards, a use for both passive and active antennas and scalability realization adapted to adapt to a variation in the number of radiating elements to implement so as to optimize the resulting antennal gain.

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  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Optical Integrated Circuits (AREA)
EP18215647.1A 2017-12-26 2018-12-21 Quasioptischer strahlformer, entsprechende elementarantenne und plattform, entsprechendes antennensystem und kommunikationsverfahren Active EP3506429B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1701368A FR3076088B1 (fr) 2017-12-26 2017-12-26 Formateur de faisceaux quasi-optique, antenne elementaire, systeme antennaire, plateforme et procede de telecommunications associes

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Publication Number Publication Date
EP3506429A1 true EP3506429A1 (de) 2019-07-03
EP3506429B1 EP3506429B1 (de) 2020-11-18

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EP18215647.1A Active EP3506429B1 (de) 2017-12-26 2018-12-21 Quasioptischer strahlformer, entsprechende elementarantenne und plattform, entsprechendes antennensystem und kommunikationsverfahren

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EP (1) EP3506429B1 (de)
ES (1) ES2856222T3 (de)
FR (1) FR3076088B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112768950A (zh) * 2020-12-24 2021-05-07 北京理工大学 一种全金属部分麦克斯韦鱼眼透镜宽角覆盖多波束天线

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6426726B1 (en) * 2001-08-15 2002-07-30 Northrop Grumman Corporation Polarized phased array antenna
US20140132455A1 (en) * 2012-11-15 2014-05-15 The Aerospace Corporation Antenna assembly and methods of assembling same
US20140176377A1 (en) * 2012-12-20 2014-06-26 Canon Kabushiki Kaisha Antenna system
FR3034262A1 (fr) * 2015-03-23 2016-09-30 Thales Sa Matrice de butler compacte, formateur de faisceaux bidimensionnel planaire et antenne plane comportant une telle matrice de butler
FR3038457A1 (fr) * 2015-07-03 2017-01-06 Thales Sa Formateur de faisceaux quasi-optique a lentille et antenne plane comportant un tel formateur de faisceaux

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6426726B1 (en) * 2001-08-15 2002-07-30 Northrop Grumman Corporation Polarized phased array antenna
US20140132455A1 (en) * 2012-11-15 2014-05-15 The Aerospace Corporation Antenna assembly and methods of assembling same
US20140176377A1 (en) * 2012-12-20 2014-06-26 Canon Kabushiki Kaisha Antenna system
FR3034262A1 (fr) * 2015-03-23 2016-09-30 Thales Sa Matrice de butler compacte, formateur de faisceaux bidimensionnel planaire et antenne plane comportant une telle matrice de butler
FR3038457A1 (fr) * 2015-07-03 2017-01-06 Thales Sa Formateur de faisceaux quasi-optique a lentille et antenne plane comportant un tel formateur de faisceaux

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112768950A (zh) * 2020-12-24 2021-05-07 北京理工大学 一种全金属部分麦克斯韦鱼眼透镜宽角覆盖多波束天线

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FR3076088B1 (fr) 2020-01-10
EP3506429B1 (de) 2020-11-18
FR3076088A1 (fr) 2019-06-28
ES2856222T3 (es) 2021-09-27

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