EP4396901B1 - Mehrbandantenne - Google Patents

Mehrbandantenne

Info

Publication number
EP4396901B1
EP4396901B1 EP22773283.1A EP22773283A EP4396901B1 EP 4396901 B1 EP4396901 B1 EP 4396901B1 EP 22773283 A EP22773283 A EP 22773283A EP 4396901 B1 EP4396901 B1 EP 4396901B1
Authority
EP
European Patent Office
Prior art keywords
cavity
radiating element
resonant
cavities
antenna
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.)
Active
Application number
EP22773283.1A
Other languages
English (en)
French (fr)
Other versions
EP4396901C0 (de
EP4396901A1 (de
Inventor
Nicolas ATTAJA
Mauro Ettorre
Ronan Sauleau
Davy GUIHARD
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
ArianeGroup SAS
Original Assignee
Centre National de la Recherche Scientifique CNRS
Universite de Rennes 1
ArianeGroup SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Centre National de la Recherche Scientifique CNRS, Universite de Rennes 1, ArianeGroup SAS filed Critical Centre National de la Recherche Scientifique CNRS
Publication of EP4396901A1 publication Critical patent/EP4396901A1/de
Application granted granted Critical
Publication of EP4396901C0 publication Critical patent/EP4396901C0/de
Publication of EP4396901B1 publication Critical patent/EP4396901B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/48—Combinations of two or more dipole type antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • 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
    • 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
    • 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
    • H01Q19/10—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 reflecting surfaces
    • H01Q19/108—Combination of a dipole with a plane reflecting surface
    • 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

Definitions

  • the present invention relates to an antenna capable of transmitting in several frequency bands with wide coverage and allowing on its own to carry out several distinct communication functions.
  • Spacecraft are equipped with antennas that ensure communication between these vehicles and ground stations during flight phases. These antennas are used in particular for telemetry, trajectory, or the satellite positioning system ("Global Navigation Satellite System", GNSS).
  • GNSS Global Navigation Satellite System
  • the antennas are multi-band multi-port with a significant need for decoupling between bands. These antennas directly perform a filtering function allowing simultaneous transmission and reception at different frequencies with a low level of interference.
  • Base stations have individual radiating elements sized for each frequency band that do not have this problem of radiation pattern instability. Furthermore, the arrangements incorporated, for example in the article " A Dual-broadband, Dual-polarized Base Station Antenna for 2G/3G/4G Applications” by H. Huang et al. published in 2017 in IEEE Antennas and Wireless Propagation Letters , intertwined, for example in the article " Suppression of Cross-Band Scattering in Multiband Antenna Arrays” by H.H. Sun et al. published in 2019 in IEEE Trans.
  • the present invention relates to an antenna according to claim 1.
  • This invention makes it possible to produce a simple antenna architecture capable of accommodating a multitude of radiating elements operating at different frequencies. Thanks to this architecture, the mutual interaction between these elements is reduced. Each radiating element can therefore function correctly and can therefore produce a quality polarization and hemispherical radiation pattern.
  • the invention also provides optimization degrees of freedom that allow the initial dimensions of the largest radiating element and its resonant cavity to be reduced.
  • the antenna also comprises a third resonant cavity closed by a bottom at one end and comprising a radiating element superimposed on the bottom of the third resonant cavity, the radiating element of the third cavity being capable of emitting a signal in a third frequency band separate from the first and second frequency bands and a third distance between the bottom and the radiating element of the third cavity being different at least from the first or the second distance.
  • the antenna also comprises a fourth resonant cavity closed by a bottom at one end and comprising a radiating element superimposed on the bottom of the fourth resonant cavity, the radiating element of the fourth cavity being capable of emitting a signal in a fourth frequency band separate from the first, second and third frequency bands and a fourth distance between the bottom and the radiating element of the fourth cavity being different at least from the first, second or third distance.
  • the cavities within the antenna are distinct cavities that define distinct background areas delimited by the walls of these cavities.
  • a tri- or quad-band antenna By having three or four cavities, a tri- or quad-band antenna can be made.
  • a wall of the first cavity and a wall of the second cavity have a common portion, the walls being distinct from the bottoms of the cavities.
  • Having a common portion allows the walls of the first and second cavities to be merged on this common portion.
  • the first cavity and the second cavity are tangent and their walls have a common generator.
  • At least a part of the second cavity is located inside the first cavity.
  • the radiating elements of the resonant cavities are located in the same plane.
  • the bottoms of the resonant cavities are located in the same plane.
  • the resonant cavities are single-mode or predominantly single-mode in the frequency bands of the associated radiating elements.
  • single-mode we mean that only the fundamental mode of the resonant cavity considered can propagate.
  • most single-mode we mean that the resonant cavity considered is single-mode over at least 50%, for example at least 75%, of the frequency band considered. In this case, the resonant cavity may not be single-mode on at least one end of the frequency band, it may be modeless or dual-mode on that end.
  • the distinct resonant cavities of the first cavity are distributed uniformly along a circumferential direction of the first resonant cavity.
  • the resonant cavities have an oval, circular, square or octagonal section.
  • At least one of the resonant cavities comprises an iris-based filtering structure, absorbers or openings on its wall at an end opposite the bottom of the resonant cavity.
  • Another object of the invention is a vehicle equipped with at least one antenna according to the invention.
  • the vehicle is a space vehicle.
  • the vehicle is a space launcher, an exploration vehicle or a satellite.
  • This coverage rate can therefore, for example, meet the typical needs of a GPS geolocation system.
  • the wall of a resonant cavity is a wall of the cavity distinct from its bottom which extends around the axis of the height of the antenna.
  • the circumference of a cavity is also called the perimeter of this cavity.
  • FIGS. 1 and 2 represent, schematically and partially, an antenna 100 according to a first embodiment of the invention, the figure 2 being a sectional view of the antenna 100.
  • the antenna 100 comprises four resonant cavities 110, 120, 130 and 140, and extends in height along a Z axis.
  • the four cavities 110, 120, 130 and 140 are distinct cavities which define distinct bottom zones delimited by the walls of the different cavities.
  • the first resonant cavity 110 is closed by a bottom 112 at one end and comprises a radiating element 111 superimposed on its bottom 112 along the Z axis of the height of the antenna 100.
  • the radiating element 111 is capable of emitting a signal in a first frequency band.
  • the second resonant cavity 120 is closed by a bottom 122 at one end and comprises a radiating element 121 superimposed on its bottom 122 along the Z axis of the height of the antenna 100.
  • the radiating element 121 is capable of emitting a signal in a second frequency band separate from the first frequency band.
  • the distance h2 between the bottom 122 and the radiating element 121 of the second cavity 120 is different from the distance h1 between the bottom 112 and the radiating element 111 of the first cavity 110, the distances h1 and h2 being measured along the Z axis of the height of the antenna.
  • the second cavity 120 is located at least partially inside the first cavity 110.
  • the wall 125 of the second cavity 120 shares two common portions 124 with the wall 115 of the first cavity 110.
  • the third resonant cavity 130 is closed by a bottom 132 at one end and comprises a radiating element 131 superimposed on its bottom 132 along the Z axis of the height of the antenna 100.
  • the radiating element 131 is capable of emitting a signal in a third frequency band separate from the first and second frequency bands.
  • the distance h3 between the bottom 132 and the radiating element 131 of the third cavity 130 is different by at least the distance h1 and/or the distance h2, the distance h3 being measured along the Z axis of the height of the antenna.
  • the fourth resonant cavity 140 is closed by a bottom 142 at one end and comprises a radiating element 141 superimposed on its bottom 142 along the Z axis of the height of the antenna 100.
  • the radiating element 141 is capable of emitting a signal in a fourth frequency band separate from the first, second and third frequency bands.
  • the radiating elements of one cavity and another cavity with a smaller diameter are separated by a distance Dmin equal to the difference between the radius of the cavity and the radius of the other cavity with a smaller diameter, the distance between the radiating elements of the two cavities being measured along an axis perpendicular to the Z axis of the antenna height. More generally, the greater the distance between two radiating elements of two different cavities, the better the performance, in terms of coupling and diffraction.
  • the distance h4 between the bottom 142 and the radiating element 141 of the fourth cavity 140 is different by at least the distance h1, the distance h2 and/or the distance h3, the distance h4 being measured along the Z axis of the height of the antenna.
  • the distances h1, h2, h3 and h4 are all different.
  • the distance h between the bottom and the radiating element of the cavities depends on the emission frequency of the radiating element, thus the more the distance h increases, the more the emission frequency decreases.
  • the distances h between the bottom and the radiating element of the cavities also depend on the type of radiating element.
  • the distance h between the bottom of the cavity and the dipole will be close of ⁇ g /4 with ⁇ g the effective wavelength of the central frequency of the dipole emission frequency band.
  • the third 130 and fourth 140 resonant cavities are located inside the first cavity 110, for example entirely inside the first cavity 110 as illustrated in the figure 1
  • the wall 135 of the third cavity 130 and the wall 145 of the fourth cavity 140 share a common portion 134 for the third cavity 130 and 144 for the fourth cavity 140 with the wall 115 of the first cavity 110.
  • the radiating elements 111, 121, 131 and 141 can be directly powered by a coaxial cable which passes through the corresponding cavity from its bottom to the radiating element, such as for example the cable 123 shown for the element 121 of the second cavity 120.
  • the radiating elements 111, 121, 131 and 141 are located in the same plane, but it is also possible to have the radiating elements in different planes with bottoms 112, 122, 132, 142 also in different planes or with bottoms 112, 122, 132, 142 located in the same plane.
  • the four frequency bands of the different radiating elements 111, 121, 131 and 141 are disjoint.
  • the four frequency bands are for example the UHF band between 432 MHz and 434 MHz, the GNSS band between 1164 MHz and 1591 MHz, the S band between 2200 MHz and 2290 MHz and the C band between 5400 MHz and 5900 MHz.
  • the first two frequency bands for example those of the radiating elements 111 and 121, are disjoint and that the other two frequency bands, i.e. those of the radiating elements 131 and 141, share common frequencies with the first two frequency bands.
  • FIG. 3 represents, schematically and partially, an antenna 300 according to another embodiment of the invention.
  • the antenna 300 comprises three resonant cavities 310, 320 and 330 and extends in height along the Z axis.
  • Each resonant cavity 310, 320, 330 is closed at one end by a bottom 312, 322, 332 and comprises a radiating element 311, 321, 331.
  • the radiating elements of each cavity are superimposed on the bottom of the cavity along the Z axis of the height of the antenna 300.
  • the radiating element 311 of the first cavity 310 is capable of emitting a signal in a first frequency band
  • the radiating element 321 of the second cavity 320 is capable of emitting a signal in a second frequency band separate from the first frequency band
  • the radiating element 331 of the third cavity 330 is capable of emitting a signal in a third frequency band which may be separate from the first and second frequency bands or include frequencies in common with one of the first two bands.
  • the distance between the bottom 312 and the radiating element 311 of the first cavity 310 is different by at least the distance between the bottom 322 and the radiating element 321 of the second cavity 320 or the distance between the bottom 332 and the radiating element 331 of the third cavity 330.
  • the distance between the bottom 322 and the radiating element 321 of the second cavity 320 is different by at least the distance between the bottom 312 and the radiating element 311 of the first cavity 310 or the distance between the bottom 332 and the radiating element 331 of the third cavity 330.
  • the cavity 320 is tangent to the first cavity 310 outside the cavity 310.
  • the walls of the two cavities 310 and 320 have a common portion, and more particularly, in the illustrated embodiment, the cavities 310 and 320 have a common generator 324.
  • the walls of the cavities 310 and 320 are thus merged along this common generator 324.
  • the fact of having the cavity 320 outside the first cavity and sharing a common generator makes it possible to limit the interactions between the radiating elements of these two cavities.
  • Cavity 330 is also tangent to first cavity 310 but is located inside cavity 310. Like cavity 320, cavity 330 has a common generator 334 with cavity 310.
  • FIG 4 represents, schematically and partially, an antenna 400 according to another embodiment of the invention.
  • the antenna 400 comprises three resonant cavities 410, 420 and 430.
  • Each resonant cavity 410, 420, 430 is closed at one end by a bottom 412, 422, 432 and comprises a radiating element 411, 421, 431.
  • the radiating elements of each cavity are superimposed on the bottom of the cavity along the Z axis of the height of the antenna 400.
  • the radiating element 411 of the first cavity 410 is capable of emitting a signal in a first frequency band
  • the radiating element 421 of the second cavity 420 is capable of emitting a signal in a second frequency band separate from the first frequency band.
  • the radiating element 431 of the third cavity 430 is capable of emitting a signal in a third frequency band which may be separate from the first and second frequency bands or which may comprise frequencies common to one of the first two bands.
  • the distance between the bottom 412 and the radiating element 411 of the first cavity 410 is different by at least the distance between the bottom 422 and the radiating element 421 of the second cavity 420 or the distance between the bottom 432 and the radiating element 431 of the third cavity 430.
  • the distance between the bottom 422 and the radiating element 421 of the second cavity 420 is different by at least the distance between the bottom 412 and the radiating element 411 of the first cavity 410 or the distance between the bottom 432 and the radiating element 431 of the third cavity 430.
  • the second cavity 420 is located partially inside the first cavity 410, while the third cavity 430 is located inside the first cavity 410.
  • the wall 425 of the second cavity 420 comprises openings over its entire circumference on the end not closed by the bottom 422.
  • the edge of the wall 425 has a crenellated shape thus defining a plurality of openings. This makes it possible to obtain improved gain at low elevation angles in the high frequencies of the second frequency band while limiting the drop in gain in the low frequencies of the second frequency band.
  • the wall 435 of the third cavity 430 includes openings on a portion of its circumference on the end not closed by the bottom 432. This makes it possible to obtain improved gain at low elevation angles in the high frequencies of the third frequency band.
  • the resonant cavities are presented with a circular section, however these cavities can also have any section, for example a square, oval, hexagonal section, etc.
  • the resonant cavities may be double cavities as described in the French patent application FR 20 09240 , that is to say that the waveguide forming the double cavity comprises two distinct resonant cavities, one of which is located inside the other and these cavities are single-mode or predominantly single-mode in a disjoint frequency band.
  • the radiating elements associated with the double cavities are dual-band elements. This makes it possible to obtain improved hemispherical coverage in the high band associated with the double cavity and its radiating element.
  • the external cavity also comprises openings on its wall, it is possible to accentuate this effect without impacting the low emission frequency band.
  • the resonant cavities may be single-mode or predominantly single-mode in the frequency band of the radiating element associated with the cavity. This makes it possible to minimize the dimensions of the antenna while maintaining optimal operation of the radiating elements.
  • the radiating elements of the resonant cavities may be of the patch, slot or dipole type. They may be single-band or multi-band.
  • the radiating elements may also be printed on a substrate on one or more layers and/or be dual, single or circularly polarized. When the radiating elements are printed on a substrate, the substrate may close the end of the cavity opposite that closed by the bottom of the cavity.
  • the radiating elements may also be volumetric, such as metal dipoles that may be produced, for example, by three-dimensional metal printing and suspended in the resonant cavity.
  • the resonant cavities may be filled with a dielectric material, such as dielectric foam.
  • the angular deviation ⁇ between two consecutive cavities is 120° ⁇ 30°.
  • the angular deviation ⁇ between two consecutive cavities is 180° ⁇ 45°.
  • the different resonant cavities of the first cavity can be distributed uniformly around the circumference of the first cavity.
  • all the resonant cavities can have a waveguide delimiting them of the same height or of different heights along the Z axis of the height of the antenna.
  • two of them may have an equal distance between their bottom and their radiating element.
  • the cavities can be filled with a dielectric material and their distance between their bottom and their radiating element is between ⁇ g /8 and ⁇ g /2 with ⁇ g the wavelength guided in the dielectric material.

Landscapes

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

Claims (11)

  1. Antenne (100, 300, 400), umfassend mindestens einen ersten resonanten Hohlraum (110, 310, 410) und einen zweiten resonanten Hohlraum (120, 320, 420), wobei jeder resonante Hohlraum (110, 120, 310, 320, 420) durch einen Boden (112, 122, 312, 322, 422) an einem Ende geschlossen ist und ein abstrahlendes Element (111, 121, 311, 321, 421) umfasst, das dem Boden des resonanten Hohlraums überlagert ist, das abstrahlende Element (111, 311, 411) des ersten Hohlraums (110, 310, 410) geeignet ist, um ein Signal in einem ersten Frequenzband zu emittieren, und das abstrahlende Element (121, 321, 421) des zweiten Hohlraums (120, 320, 420) dazu geeignet ist, ein Signal in einem zweiten Frequenzband zu emittieren, das von dem ersten Frequenzband getrennt ist, ein erster Abstand (h1) zwischen dem Boden (112) und dem strahlenden Element (111) des ersten Hohlraums (110) sich von einem zweiten Abstand (h2) zwischen dem Boden (122) und dem strahlenden Element (121) des zweiten Hohlraums (120) unterscheidet, die Antenne auch umfassend einen dritten resonanten Hohlraum (130, 330, 430), der an einem Ende durch einen Boden (132, 332, 432) geschlossen ist und umfassend ein abstrahlendes Element (131, 331, 431), das dem Boden des dritten resonanten Hohlraums überlagert ist, wobei das abstrahlende Element des dritten Hohlraums geeignet ist, um ein Signal in einem dritten Frequenzband zu emittieren, das von dem ersten und dem zweiten Frequenzband getrennt ist, und ein dritter Abstand (h3) zwischen dem Boden (132) und dem abstrahlenden Element (131) des dritten Hohlraums (130) zumindest von dem ersten (h1) oder dem zweiten (h2) Abstand verschieden ist, dadurch gekennzeichnet, dass die verschiedenen resonanten Hohlräume des ersten Hohlraums über den Umfang des ersten Hohlraums mit einem minimalen Winkelabstand θmin = 360 x (1 - 0,25)/n und einem maximalen Winkelabstand θmax = 360 x (1 + 0,25)/n zwischen zwei aufeinanderfolgenden Hohlräumen verteilt sind, wobei n die Anzahl der verschiedenen resonanten Hohlräume des ersten Hohlraums ist.
  2. Antenne (100) nach Anspruch 1, auch umfassend einen vierten resonanten Hohlraum (140), der an einem Ende durch einen Boden (142) geschlossen ist und umfassend ein abstrahlendes Element (141), das dem Boden des vierten resonanten Hohlraums überlagert ist, wobei das abstrahlende Element des vierten Hohlraums geeignet ist, um ein Signal in einem vierten Frequenzband zu emittieren, das von dem ersten, zweiten und dritten Frequenzband getrennt ist, und ein vierter Abstand (h4) zwischen dem Boden (142) und dem abstrahlenden Element (141) des vierten Hohlraums (140) zumindest von dem ersten (h1) oder dem zweiten (h2) oder dem dritten Abstand (h3) verschieden ist,
  3. Antenne nach einem der Ansprüche 1 oder 2, wobei eine Wand (115) des ersten Hohlraums (110, 310) und eine Wand (125) des zweiten Hohlraums (120, 320) einen gemeinsamen Abschnitt (124, 324) aufweisen, sich die Wände von den Böden der Hohlräume unterscheiden.
  4. Antenne nach Anspruch 3, wobei sich mindestens ein Teil des zweiten Hohlraums (120, 330, 430) im Innern des ersten Hohlraums (110, 310, 410) befindet.
  5. Antenne nach einem der Ansprüche 1 bis 4, wobei sich die abstrahlenden Elemente (111, 121, 131, 141) der resonanten Hohlräume (110, 120, 130, 140) in ein und derselben Ebene befinden.
  6. Antenne nach einem der Ansprüche 1 bis 4, wobei sich die Böden der resonanten Hohlräume in ein und derselben Ebene befinden.
  7. Antenne nach einem der Ansprüche 1 bis 6, wobei die resonanten Hohlräume konfiguriert sind, um in den Frequenzbändern der assoziierten strahlenden Elemente monomodal oder überwiegend monomodal zu sein.
  8. Antenne nach einem der Ansprüche 2 bis 7, wobei die separaten resonanten Hohlräume des ersten Hohlraums gleichförmig entlang einer Umfangsrichtung des ersten resonanten Hohlraums verteilt sind.
  9. Fahrzeug, das mit mindestens einer Antenne nach einem der Ansprüche 1 bis 8 ausgerüstet ist.
  10. Fahrzeug nach Anspruch 9, wobei das Fahrzeug ein Raumfahrzeug ist.
  11. Fahrzeug nach Anspruch 10, wobei das Fahrzeug eine Trägerrakete für den Weltraum, ein Erkundungsfahrzeug oder ein Satellit ist.
EP22773283.1A 2021-09-02 2022-08-29 Mehrbandantenne Active EP4396901B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2109169A FR3126554B1 (fr) 2021-09-02 2021-09-02 Antenne multi-bandes
PCT/FR2022/051615 WO2023031543A1 (fr) 2021-09-02 2022-08-29 Antenne multi-bandes

Publications (3)

Publication Number Publication Date
EP4396901A1 EP4396901A1 (de) 2024-07-10
EP4396901C0 EP4396901C0 (de) 2025-08-06
EP4396901B1 true EP4396901B1 (de) 2025-08-06

Family

ID=78820739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22773283.1A Active EP4396901B1 (de) 2021-09-02 2022-08-29 Mehrbandantenne

Country Status (5)

Country Link
US (1) US12113298B2 (de)
EP (1) EP4396901B1 (de)
ES (1) ES3049759T3 (de)
FR (1) FR3126554B1 (de)
WO (1) WO2023031543A1 (de)

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Publication number Priority date Publication date Assignee Title
US5276457A (en) * 1992-02-14 1994-01-04 E-Systems, Inc. Integrated antenna-converter system in a unitary package
US5548299A (en) * 1992-02-25 1996-08-20 Hughes Aircraft Company Collinearly polarized nested cup dipole feed
US6281746B1 (en) * 1999-12-16 2001-08-28 Lockheed Martin Corporation Parametric cavity microwave amplifier
FR2870642B1 (fr) * 2004-05-19 2008-11-14 Centre Nat Rech Scient Cnrse Antenne a materiau bip (bande interdite photonique) a paroi laterale entourant un axe
US8368596B2 (en) * 2004-09-24 2013-02-05 Viasat, Inc. Planar antenna for mobile satellite applications
WO2009013347A1 (en) * 2007-07-25 2009-01-29 Jast Sa Omni-directional antenna for mobile satellite broadcasting applications
US20160061938A1 (en) * 2012-06-08 2016-03-03 Flex Force Enterprises LLC Clutter Rejection Using Spatial Diversity In Wideband Radar For Enhanced Object Detection
US9196966B1 (en) * 2012-09-17 2015-11-24 Amazon Technologies, Inc. Quad-slot antenna for dual band operation
US9178283B1 (en) * 2012-09-17 2015-11-03 Amazon Technologies, Inc. Quad-slot antenna for dual band operation
TWM455997U (zh) * 2013-01-21 2013-06-21 Unictron Technologies Corp 耦合饋入式微帶天線
US9325070B1 (en) * 2013-06-24 2016-04-26 Amazon Technologies, Inc. Dual-loop-slot antenna
EP3581954B1 (de) * 2018-06-12 2023-03-08 Siemens Healthcare GmbH Sensor und magnetresonanztomograph mit drahtloser nahfeldübertragung von energie und daten

Also Published As

Publication number Publication date
EP4396901C0 (de) 2025-08-06
US12113298B2 (en) 2024-10-08
FR3126554A1 (fr) 2023-03-03
US20240275047A1 (en) 2024-08-15
ES3049759T3 (en) 2025-12-18
FR3126554B1 (fr) 2024-08-30
EP4396901A1 (de) 2024-07-10
WO2023031543A1 (fr) 2023-03-09

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