EP3664214A1 - Mehrfachzugriff strahlelemente - Google Patents

Mehrfachzugriff strahlelemente Download PDF

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Publication number
EP3664214A1
EP3664214A1 EP19212776.9A EP19212776A EP3664214A1 EP 3664214 A1 EP3664214 A1 EP 3664214A1 EP 19212776 A EP19212776 A EP 19212776A EP 3664214 A1 EP3664214 A1 EP 3664214A1
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EP
European Patent Office
Prior art keywords
excitation
guide
horn
radiating
radiating element
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
EP19212776.9A
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English (en)
French (fr)
Other versions
EP3664214C0 (de
EP3664214B1 (de
Inventor
Jean-Philippe Fraysse
Charalampos STOUMPOS
Hervé Legay
Ségolène TUBAU
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Thales SA
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Thales SA
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Publication of EP3664214C0 publication Critical patent/EP3664214C0/de
Publication of EP3664214B1 publication Critical patent/EP3664214B1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02—Waveguide horns
    • H01Q13/025—Multimode horn antennas; Horns using higher mode of propagation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02—Waveguide horns
    • H01Q13/0208—Corrugated horns
    • H01Q13/0225—Corrugated horns of non-circular cross-section
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • 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

Definitions

  • the invention relates to the general field of antennas, in particular satellite antennas, in particular active antennas, network antennas or multibeam antennas.
  • antennas include several radiating elements, the invention relates more specifically to compact multiple access radiating elements with high radiation efficiency.
  • a network antenna consists of radiating elements which must respect certain characteristics. In particular, they must have a radiating surface whose maximum dimensions depend on the operating frequency and the desired angular spacing between the main lobe generated by the antenna and its network lobes. Taking into account these dimensional constraints, they must have the maximum surface efficiency, that is to say close to 100%.
  • the surface efficiency characterizes the coefficient between the directivity of the radiating element and that which would be obtained by a radiating opening occupying the space allocated to the radiating element, and on which a uniform distribution of the electric field is imposed. Maximizing the surface efficiency of the radiating elements makes it possible to optimize the gain of the array antenna and to reduce the levels of the secondary lobes and of the array lobes.
  • the gain will be maximized, and it will thus be possible to minimize the power of the amplifiers of the transmitting antennas or to maximize the G / T ratio of the receiving antennas.
  • the radiating elements must also have a small footprint and a low mass and / or the capacity to be excited in a compact manner in simple or bi-polarization and a bandwidth compatible with the intended application.
  • a general problem which the invention seeks to solve consists in designing radiating elements which make it possible to obtain at the output of the radiating opening an electric field as uniform as possible while respecting the sizing constraints imposed.
  • each radiating element must be compact and have a short profile.
  • the figure 1 shows schematically a first example of a radiating element 100 according to the prior art.
  • the radiant element of the figure 1 comprises a first access waveguide 101 and a second waveguide 102 in the form of a horn flared towards the radiating opening.
  • the section of the horn is square. This type of known radiating element ensures a smooth transition between the signal guided via the access guide 101 and the radiated signal at the output of the horn 102.
  • the radiant element 100 of the figure 1 has the drawback, however, of a low radiation efficiency since it does not make it possible to obtain an electric field uniformly distributed over its opening. Indeed, the structure of the horn 102 only favors the propagation of the fundamental mode of the excited wave at the level of the access guide 101.
  • the figure 2 shows schematically a sectional profile view of the radiating element 100.
  • the curve 103 shows diagrammatically the distribution of the density of the radiated electric field at the opening of the horn 102. As indicated on the figure 2 , the maximum energy of the radiated electric field is reached at the center of the opening while the energy gradually decreases from the center to the edges of the opening.
  • the profile of the horn can be modified as described in the example of the figure 3 .
  • the horn 302 no longer has a straight linear profile but a wavy profile or so-called "spline" profile.
  • One such profile consists in making undulations on the wall of the horn 302 in order to excite and control the propagation of higher modes of the radiated wave inside the horn.
  • This example is described in publication (1). Thanks to this type of profile, an adequate combination of the different wave propagation modes is obtained over the radiating opening of the horn 302 which leads to a distribution more homogeneous of the electric field 303 as shown schematically on the figure 3 .
  • the distribution of the electric field is still not uniform because the energy decreases, in this pictorial example, towards the center of the opening.
  • the electric field can have more than two energy maxima but in all cases the distribution of the electric field is not uniform.
  • the figure 4 shows another example of a radiating element 400 as described in publication (2).
  • an array of horns is used, each having a small opening in order to obtain a better overall radiation efficiency for the radiating opening of the antenna.
  • the radiating element 400 thus consists of several sub-elements each comprising an access guide 401,411 and a horn 402,412 of the type described in the figure 1 .
  • a power distributor 404 ensures the uniform and phase supply of the various sub-elements of the network.
  • the distribution 403 of the density of the electric field radiated at the opening of the cone network is also not uniform. In particular, it has a minimum close to 0 at the center of the distribution.
  • the solution of the figure 4 has the advantage of using radiating sub-elements with a small opening and which therefore have a length significantly less than that of a radiating element of the type of figure 1 .
  • This solution thus makes it possible to develop compact radiating elements.
  • it does not make it possible to obtain a uniform distribution of the electric field over the radiating opening because, as shown diagrammatically by the curve 403 on the figure 4 , the tangential electric field is canceled out on the metal walls of this radiating element, and electric field level minima are identified between the various horns 402,412 which penalizes the overall radiation efficiency.
  • Another disadvantage of the solution of the figure 4 is that it requires the use of a power distributor 404 connected to the radiating sub-elements to supply them in phase. The distributor 404 must respect the mesh of the antenna and be very compact so as not to penalize the overall profile of the antenna.
  • the figure 5 schematizes yet another example of radiating element 500 as described in the American patent US6211838 .
  • This solution consists of a radiant opening network supplied by a power distributor integrated into the horn 502 as it widens.
  • This solution has a radiation efficiency comparable to that of the example of the figure 4 with the same disadvantage of minimum level of the electric field between the different openings as illustrated by the electric field curve 503.
  • the figure 6 shows yet another example of a radiating element 600 described in the French patent application FR3012917 .
  • the radiating element 600 consists of several Fabry-Pérot cavities 603,613,604 which are superimposed, the assembly being supplied by several access guides 602,612.
  • Each Fabry-Pérot cavity 603,613,604 is a metallic cavity closed by a grid 606,616,626 which is configured to reflect a part of the signal injected at the center of the cavity towards its periphery.
  • This approach makes it possible to obtain better radiation efficiency at the surface than the solutions described above, as illustrated by the electric field curve 605.
  • it has the drawback of being difficult to apply over a wide frequency band while guaranteeing a good adaptation to access.
  • the invention proposes a new type of radiating element which is based on the excitation of a single radiating opening by several accesses. Unlike a known network of radiating elements, the radiating element proposed comprises a horn common to all the accesses which are coupled to the common horn at the level of an excitation interface and by means of excitation guides.
  • the excitation guides In order to control the excitation and combination levels of the different modes of propagation of the wave over the radiating aperture, the excitation guides also work in several modes. The excitation and the control of these modes in the excitation guides are obtained in particular thanks to their asymmetry.
  • the subject of the invention is a radiating element comprising at least two supply guides and a horn common to at least two supply guides and having an excitation interface, each supply guide comprising an access guide and a excitation guide connected to the access guide by an access interface and connected to the common horn by the excitation interface, each excitation guide being flared in the direction of the access interface towards the interface excitation, each excitation guide having no axis of symmetry, the two supply guides being identical and arranged symmetrically with respect to one another with respect to a plane of symmetry of the radiating element, and the flaring profile of each excitation guide is configured so as to control, in amplitude and in phase, the modes of propagation of a radiating wave propagated from each access guide to the exit of the horn, to that the electric field obtained at the outlet of the horn is sen so uniformly.
  • each excitation guide is configured so as to favor the propagation of a fundamental propagation mode and of a higher propagation mode of order two in the guide of excitement.
  • the flaring profile of each excitation guide is configured so as to favor the propagation, in the horn, of several modes of propagation of odd orders, from the mode of fundamental propagation and of the order two higher propagation mode propagated in each excitation guide.
  • the flaring profile of each excitation guide is configured so as to control the amplitude and the phase of each propagation mode propagated in the horn so that the electric field resulting from the combination of all the propagation modes propagated in the horn is uniform at the exit of the horn.
  • the radiating element according to the invention comprises at least four supply guides, the horn being common to four supply guides, the four supply guides being arranged symmetrically with respect to two planes of orthogonal symmetry.
  • each feed guide is configured so that the longitudinal axis of an access guide is offset from the center of the opening of the excitation guide connected to the interface of excitement.
  • the radiating element according to the invention further comprises a power distributor for energizing the access guides in phase.
  • a cross section of the excitation guide is square, rectangular or circular.
  • the radiating element has operation in mono-polarization or in bi-polarization.
  • each excitation guide has a continuous or discontinuous flaring profile.
  • the common horn is axisymmetric.
  • each excitation guide has a flared profile on a first plane and an invariant profile on a second plane orthogonal to the foreground.
  • the invention also relates to a radiating device comprising at least four radiating elements according to one of the preceding claims and a secondary horn common to the four radiating elements and connected via a input interface to the openings of the respective horns of each radiating element.
  • the invention also relates to an antenna comprising a plurality of radiating elements or a plurality of radiating devices according to the invention.
  • the antenna element 700 comprises two feed guides coupled to a common horn 703 via an excitation interface 704.
  • the common horn 703 is, for example, an axisymmetric horn of square or rectangular section or circular, the choice of the section being made as a function of the dimensioning constraints of the array of antenna elements, in particular the mesh of the array.
  • Each feed guide includes an access guide 701,711 coupled to an excitation guide 702,712. Access guides and excitation guides are, for example, made in waveguide technology.
  • Each excitation guide is flared in the direction of the access guide towards the excitation interface 704.
  • each excitation guide has no axis of symmetry, in particular its longitudinal section (as shown in the figure 7 ) is asymmetrical.
  • the two supply guides are identical and arranged symmetrically with respect to each other with respect to a plane of symmetry 706 and coupled to the excitation interface 704 as illustrated in the figure 7 .
  • the access guides 701,711 are, for example, square or rectangular or circular section guides with a straight profile.
  • the excitation guides 702,712 may likewise comprise a square, rectangular or circular profile, but they have an asymmetrical flaring profile.
  • the flaring profile of an excitation guide is dimensioned so as to excite and effectively control a combination of the modes of propagation of the wave at the outlet of the radiating opening 705 of the common horn 703.
  • the figure 8 shows schematically a side view of a feed guide 800 identical to one of the feed guides described in figure 7 .
  • the feed guide 800 has the particularity of having an asymmetrical profile. More specifically, the axis 806 of symmetry of the access guide 801 is offset from the axis 805 passing through the center of the opening 804 of the excitation guide 802, the axis 805 being orthogonal to the interface of excitement. In other words, the axis 806 of symmetry of the access guide 801 intersects the surface defined by the opening 804 of the excitation guide at a point which is not the center of the surface.
  • the excitation guide 802 does not have any axis of orthogonal symmetry, unlike the horns usually used in known solutions.
  • a longitudinal section of an excitation guide (as shown in the figure 8 ) has no axis of symmetry lengthwise.
  • the axis 805 is not an axis of symmetry since the flare profiles on the two sides of the axis 805 are not identical.
  • the flaring profile of an excitation guide can be obtained by setting increasing values for the perimeters of the cross sections of the guide according to planes orthogonal to the view of the figure 8 and which intersect the axis 805 in an increasing direction from the access guide 801 towards the excitation interface.
  • the asymmetry of the excitation guide means that the centers of the cross sections of the excitation guide are not aligned on the same straight line perpendicular to the sections.
  • the cross section of the excitation guide may have a perimeter varying with globally increasing values in the direction of the above-mentioned axis 805 although locally the perimeter may decrease slightly.
  • the figure 9 shows schematically a perspective view of a first embodiment of the antenna element according to the invention.
  • the excitation guides 902, 912 have a flaring profile in a first plane and a straight profile in a second plane orthogonal to the foreground.
  • the radiating opening of the horn 903 is of rectangular shape of length a and width b.
  • an excitation guide 902,912 has no axis of symmetry, that is to say that it does not have invariance by rotation of an angle of 180 ° although it has a plane of symmetry parallel to side a.
  • a general objective of the invention is to obtain, over the radiating opening 903 of the radiating element 900, a uniform distribution of the electric field of the radiated wave.
  • the width b of the horn is less than ⁇ / 2, with the wavelength of the signal.
  • the figure 10 schematically represents the radiating opening of the antenna element of the figure 9 with uniform distribution of the electric field over the entire opening. This uniform distribution is represented by arrows of the same thickness which translate transverse components of the electric field of the same intensity.
  • the figure 10 represents the distribution of the desired electric field over the radiating opening.
  • the figure 11 represents a distribution of the electric field on the same radiant opening but this time considering that only the fundamental mode TE 10 is propagated.
  • the energy of the electric field has a higher level at the center of the opening than at the edges as shown in the figure 11 by means of arrows whose thickness, which reflects the intensity of the electric field, decreases from the center towards the edges of the opening, each arrow representing a transverse component of the electric field.
  • the figure 12 schematically represents a combination of several modes making it possible to obtain a substantially uniform distribution 1200 of the electric field. This involves combining in phase several TE m0 modes, with m an odd integer, with an amplitude ratio equal to 1 / m between the higher mode TE m0 , m being at least equal to 3, and the fundamental mode TE 10 .
  • TE m0 modes an odd integer
  • m an odd integer
  • m amplitude ratio
  • m amplitude ratio
  • the figure 12 illustrates, on a diagram, the distribution of the electric fields of the modes TE 10 , TE 30 and TE 50 as well as the result 1200 of the above-mentioned combination. The direction of the arrows gives the orientation of the electric field.
  • the invention consists, in particular, in generating and controlling the level of the fundamental mode and of the higher modes of odd orders at the output of the common horn to obtain a substantially uniform electric field 1200 over the radiating opening.
  • the common horn is excited via an excitation interface supplied by several excitation guides which each favor the propagation of several modes.
  • the access guides 701,711 are supplied in phase via an excitation source (not shown in the figure 7 ).
  • the access guides 701, 711 are dimensioned so that only the fundamental modes TE 10 propagate in the access guides.
  • the access guides 701, 711 are wave guides having a rectangular section and a straight profile, the section being dimensioned in such a way that only the fundamental modes can propagate.
  • the figure 13 represented schematically the electric fields corresponding to the fundamental modes TE 10.1 , TE 10.2 respectively observed at the output of the first access guide 701 and of the second access guide 711. These fundamental modes are excited in phase.
  • the progressive flaring of the excitation guides 702,712 then allows the higher order two TE 20 mode to propagate.
  • TE 10.2 from the access guides 701,711 a fundamental mode TE 10 and a higher mode of order two TE 20 , are propagated in each of the excitation guides 702,712 .
  • the figure 14 schematically represents the electric fields corresponding to the two order modes TE 20.1 , TE 20.2 generated in the excitation guides 702,712.
  • the two order modes TE 20.1 , TE 20.2 are excited in phase opposition due to the plane of symmetry 706 between the two excitation guides 702,712.
  • the propagation of the second order modes in the excitation guides 702,712 is favored by the asymmetrical shape of the excitation guides and the offset between an access guide and the opening of an excitation guide (such as illustrated in figure 8 ).
  • the fundamental and order two modes generated in the excitation guides 702,712 an adequate combination of the odd order modes (in the present example, the fundamental modes, order three and order five) is obtained.
  • the even order modes (for example of order two or four) cannot be excited in the common horn because of the symmetrical excitation of the common horn which is linked to the symmetry of the antenna element with respect to the plane 706.
  • the modes of order two generated in the excitation guides are in phase opposition and require an asymmetric structure to propagate. Naturally, they cannot spread in the common horn 703.
  • each of the modes TE 10.1 , TE 10.2 , TE 20.1 , TE 20.2 , generated in the excitation guides 702.712 makes it possible to generate modes TE 10 , TE 30 , TE 50 , in the horn. common 703 (due in particular to the larger section of the common horn compared to the section of an excitation guide).
  • 1/3 and
  • 1/5 and also allows proper phase alignment of these different modes.
  • the amplitude and phase control of the TE 10 , TE 30 , TE 50 modes generated in the horn 703 from the TE 10 , TE 20 modes generated in the excitation guides 702,712 is obtained by the asymmetrical flare profile of a excitement guide. More specifically, the flare profile can be obtained by numerical optimization using a software simulator making it possible to simulate the propagation of the different modes of the electric field as well as their phase and their amplitude, as a function of the flare profile. Thus, it is possible by optimization to determine the flare profile which makes it possible to apply the combinations of modes described above.
  • the flaring profile of an excitation guide can be obtained by determining, for different points of the longitudinal axis of the excitation guide, the dimension of the section of the guide at this point, this dimension being increasing with the flaring from the access guide to the excitation interface with the common horn.
  • the flaring profile of an excitation guide can be obtained for a discrete number of sections, resulting in a discontinuous profile in the form of "steps" as illustrated in the figure 7 where the figure 9 .
  • the profile can also be continuous as illustrated on the figure 15 which represents an alternative embodiment 1500 of the antenna element described in figure 7 .
  • the antenna element presents a flared and asymmetrical profile only on one plane, with a straight profile invariant on the other perpendicular plane.
  • the antenna element 1600 can also have a flared and asymmetrical profile on the two orthogonal planes in order to increase the radiation opening.
  • the section of an excitation guide is rectangular.
  • the section of an excitation guide can also be square or circular, thus allowing the antenna element to operate in bipolarization.
  • the excitation guides make it possible to propagate transverse modes TE 0n in addition to the transverse modes TE m0 described previously for the case of a guide of rectangular section.
  • the electric field can propagate with modes in two perpendicular directions as illustrated in the figure 17 for the case of the fundamental modes TE 10 and TE 01 and a square waveguide section.
  • the antenna element is not limited to two-port operation as described so far. It can include a number greater than two of feeding guides, preferably a number equal to a power of two.
  • the antenna element 1800 may include four feed guides 1801,1802,1803,1804, arranged symmetrically with respect to two orthogonal planes of symmetry, and a common horn 1810.
  • Each feed guide comprises an access guide and an asymmetrical excitation guide.
  • the figure 19 describes yet another embodiment of the antenna element 1900 this time comprising 16 feeding guides arranged in groups of four. Each group of four feeding guides is arranged as on the antenna element 1800 of the figure 19 .
  • the horn is common to the eight feeding guides which further increase the radiant opening.
  • the common horn can be composed of several levels or stages.
  • This principle is illustrated on the figure 20 by a side view of an antenna element with sixteen feeding guides.
  • the antenna element 2000 of the figure 20 includes a common horn made up of five elementary horns, three of which are visible in the side view of the figure 20 .
  • Four elementary horns 2001,2002 are positioned above the four sets of four feeding guides.
  • Another elementary horn 2003 is positioned above the four horns 2001,2002 of the first level.
  • the cornet 2003 of the second level combines the four horns 2001,2002 of the first level.
  • the access guides must be excited in phase.
  • a power distributor can be coupled to the inputs of the access guides.
  • the figure 21 shows an example of an antenna element 2100 with two ports and operating in mono-polarization.
  • the excitation in phase of the two access guides is carried out by means of a power distributor 2101 which mainly comprises a plane H junction 2102 and adaptation sections 2103 to interface the plane H junction with d ' on the one hand the access guides of the antenna element and on the other hand the excitation source.
  • the figure 22 shows another example of an antenna element 2200 with four ports operating in bi-polarization.
  • the four access guides are coupled to a power distributor 2201 which distributes to each access guide a fraction of the signal from each of the two polarizations with the same amplitude and the same phase.
  • a power distributor adapted to fulfill this function is a distributor comprising four ortho-mode transducers of the type described in the Applicant's French patent application filed under the number FR1700993 .
  • the power distributor is separate from the antenna element and does not allow higher order propagation modes to be generated.
  • the power distributor is integrated into the antenna element 2300.
  • the functions of power distribution and excitation of the propagation modes are combined and provided jointly by the same device in waveguide technology.

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  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Photovoltaic Devices (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Escalators And Moving Walkways (AREA)
EP19212776.9A 2018-12-03 2019-12-02 Mehrfachzugriff strahlelemente Active EP3664214B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1872213A FR3089358B1 (fr) 2018-12-03 2018-12-03 Elément rayonnant à accès multiples

Publications (3)

Publication Number Publication Date
EP3664214A1 true EP3664214A1 (de) 2020-06-10
EP3664214C0 EP3664214C0 (de) 2023-06-07
EP3664214B1 EP3664214B1 (de) 2023-06-07

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EP19212776.9A Active EP3664214B1 (de) 2018-12-03 2019-12-02 Mehrfachzugriff strahlelemente

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US (1) US11444384B2 (de)
EP (1) EP3664214B1 (de)
CA (1) CA3063463A1 (de)
ES (1) ES2952243T3 (de)
FR (1) FR3089358B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020180220A1 (en) * 2019-03-04 2020-09-10 Saab Ab Dual-band multimode antenna feed
WO2022123708A1 (ja) * 2020-12-10 2022-06-16 三菱電機株式会社 アレーアンテナ装置
CN115411473B (zh) * 2022-08-12 2023-11-07 深圳大学 基于E面Y形分支波导的TEn0模式激励器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2477785A1 (fr) * 1980-03-07 1981-09-11 Thomson Csf Source hyperfrequence multimode et antenne comportant une telle source
FR2739226A1 (fr) * 1985-01-18 1997-03-28 Thomson Csf Source hyperfrequence multimode directive et son application a une antenne radar monopulse
US6211838B1 (en) 2000-02-02 2001-04-03 Space Systems/Loral, Inc. High efficiency dual polarized horn antenna
EP1930982A1 (de) * 2006-12-08 2008-06-11 Im, Seung joon Horngruppenantenne mit zwei linearen Polarisationen
FR3012917A1 (fr) 2013-11-04 2015-05-08 Thales Sa Repartiteur de puissance compact bipolarisation, reseau de plusieurs repartiteurs, element rayonnant compact et antenne plane comportant un tel repartiteur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3071672B1 (fr) 2017-09-28 2019-10-11 Thales Repartiteur de puissance pour antenne comportant quatre transducteurs orthomodes identiques

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2477785A1 (fr) * 1980-03-07 1981-09-11 Thomson Csf Source hyperfrequence multimode et antenne comportant une telle source
FR2739226A1 (fr) * 1985-01-18 1997-03-28 Thomson Csf Source hyperfrequence multimode directive et son application a une antenne radar monopulse
US6211838B1 (en) 2000-02-02 2001-04-03 Space Systems/Loral, Inc. High efficiency dual polarized horn antenna
EP1930982A1 (de) * 2006-12-08 2008-06-11 Im, Seung joon Horngruppenantenne mit zwei linearen Polarisationen
FR3012917A1 (fr) 2013-11-04 2015-05-08 Thales Sa Repartiteur de puissance compact bipolarisation, reseau de plusieurs repartiteurs, element rayonnant compact et antenne plane comportant un tel repartiteur

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GIOVANNI TOSOPIERO ANGELETTICYRIL MANGENOT: "Multibeam antennas based on phased arrays: An overview on recent ESA developments", THE 8TH EUROPEAN CONFÉRENCE ON ANTENNAS AND PROPAGATION (EUCAP 2014, 2014
ISABELLE ALBERTMAXIME ROMIERDANIEL BELOTJEAN-PIERRE ADAMPIERRICK HAMEL, INTERNATIONAL SYMPOSIUM ON ANTENNA TECHNOLOGY AND APPLIED ELECTROMAGNETICS, vol. 15, 2012

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US11444384B2 (en) 2022-09-13
ES2952243T3 (es) 2023-10-30
FR3089358A1 (fr) 2020-06-05
FR3089358B1 (fr) 2022-01-21
US20200176878A1 (en) 2020-06-04
EP3664214C0 (de) 2023-06-07
CA3063463A1 (en) 2020-06-03
EP3664214B1 (de) 2023-06-07

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