EP4148902B1 - Elektromagnetisches system mit winkelabweichung der hauptkeule einer antenne - Google Patents

Elektromagnetisches system mit winkelabweichung der hauptkeule einer antenne

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Publication number
EP4148902B1
EP4148902B1 EP22193180.1A EP22193180A EP4148902B1 EP 4148902 B1 EP4148902 B1 EP 4148902B1 EP 22193180 A EP22193180 A EP 22193180A EP 4148902 B1 EP4148902 B1 EP 4148902B1
Authority
EP
European Patent Office
Prior art keywords
antenna
absorbing
cavity
lens
hemilens
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
EP22193180.1A
Other languages
English (en)
French (fr)
Other versions
EP4148902A1 (de
Inventor
Aritra Roy
Stéphane MALLEGOL Stéphane
Christian Renard
Cédric QUENDO
Noham MARTIN
Vincent Laur
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
Thales SA
Univerdite de Bretagne Occidentale
Indian Institute of Science IISC
Original Assignee
Centre National de la Recherche Scientifique CNRS
Thales SA
Univerdite de Bretagne Occidentale
Indian Institute of Science IISC
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, Thales SA, Univerdite de Bretagne Occidentale, Indian Institute of Science IISC filed Critical Centre National de la Recherche Scientifique CNRS
Publication of EP4148902A1 publication Critical patent/EP4148902A1/de
Application granted granted Critical
Publication of EP4148902B1 publication Critical patent/EP4148902B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/001—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems for modifying the directional characteristic of an aerial
    • 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
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • H01Q9/27—Spiral antennas

Definitions

  • the present invention relates to the field of antennas. More specifically, it relates to the control of the radiation pattern, and in particular the angular direction of the main radiation lobe of antennas.
  • an antenna In an airborne and/or naval system, electromagnetic communication is the dominant mode due to its accuracy, ease of control, and wide range of capabilities.
  • An antenna is an essential component of a wireless system.
  • an antenna is ideally a broadband antenna with circular polarization or dual linear polarization.
  • an antenna system must be as compact as possible.
  • One possible solution is to place the antenna in a compact cavity.
  • the cavity makes the radiation unidirectional and provides the antenna with electromagnetic shielding from surrounding electronic systems.
  • a compact cavity can impair the antenna's natural radiation pattern, leading to poor matching, incorrect polarization, ripples in the radiated gain, etc.
  • One possible design involves mounting a spiral antenna on a cavity filled with an electromagnetic absorber. Such an antenna has a unidirectional radiation pattern, along the line of sight, i.e., along the antenna's radio axis.
  • the main beam or radiation lobe of the antenna When an antenna placed under a flying aircraft is pointed towards the ground, the main beam or radiation lobe of the antenna must be pointed slightly forward (for example) rather than directly towards the ground, that is, it must be pointed forward at an angle to the perpendicular of the ground.
  • Another objective of this angular deflection is to avoid interference between the aircraft's various antennas, including between a transmitting and a receiving antenna.
  • broadband antennas typically have fairly wide radiation lobes, which can lead to undesirable interactions between nearby antennas.
  • the antenna In a spiral antenna system loaded by an electromagnetic absorber placed within the antenna cavity (the antenna cavity being the area between the bottom of the radiating circuit substrate and the lower reflector plane (or ground plane)), the antenna is physically tilted to meet this requirement.
  • this physical tilt may not be feasible in the aircraft design on which the antenna is to be mounted.
  • Using an antenna array is another possible solution, but it is unsuitable in environments where space is a significant constraint.
  • Another solution involves applying an angular deflection to the beam.
  • Electronic deflection consists of inducing a deviation of the main beam from the antenna's radio axis. In order to operate over a wide frequency band, such electronic deflection must be consistent across a broad frequency range, maintaining good impedance matching, polarization purity, and without degradation of the radiated gain in the desired direction, so that the antenna can be classified as a broadband antenna.
  • US patent application published under number US 6,947,010 discloses an antenna with an eccentric spiral structure.
  • the design principle of this antenna is similar to that of an Archimedean spiral antenna, except that on one side the spaces between the elements are larger than those on the other.
  • This device allows the antenna beam to be oriented, but has the disadvantage of being bulky and unable to ensure uniform deflection over a wide frequency band.
  • none of the prior art systems are capable of applying beam deflection, nor of altering the main lobe of the radiation pattern of a wire broadband antenna over a wide frequency band.
  • an antenna system that can generate angular deflection of the antenna beam over a wide frequency band. It is also needed that the antenna system can generate beam deflection while minimizing its size.
  • the invention relates to an antenna system comprising: a ground plane with a cavity covered with a dielectric, magnetic or magnetodielectric substrate, the cavity comprising an opening and walls; an antenna disposed on the dielectric, magnetic or magnetodielectric substrate; a peripheral absorbing ring disposed between the antenna and the walls; an absorbing half-lens having the shape of an angular sector (or angular segment), comprising a basic element covering a first part of the cavity opening, a second part of the cavity opening not being covered by said basic element.
  • the absorbing half-lens includes an annular element forming an extension of the peripheral absorbing crown on the second part of the aperture.
  • the first part of the cavity opening corresponds to half of the cavity opening
  • the absorbing half-lens comprises at least one circular sector element whose thickness varies according to the distance to the center of the half-lens.
  • the absorbing half-lens comprises a plurality of circular sector elements whose thickness is defined by an increasing function of an angular distance from the edges of the lens.
  • each circular sector element is defined by a thickness function that increases and then decreases as a function of a distance from the center of the half-lens.
  • At least one element among the peripheral absorbing ring and the half-lens is made of a partially absorbing dielectric material.
  • the dielectric material partially comprises carbon.
  • the antenna is a spiral antenna, a sinusoidal antenna, or a periodic antenna.
  • the antenna is defined by an Archimedean spiral.
  • the antenna is a broadband antenna, allowing a constant deflection angle to be obtained over the entire operating frequency band of the antenna.
  • the antenna system comprises: a first device including the ground plane, the antenna and the peripheral absorbing ring; a second device including the absorbing half-lens.
  • FIG. 1a represents a first example of an antenna system in a set of embodiments of the invention.
  • the Sys1a antenna system comprises a ground plane with a cylindrical cavity Cav filled with a dielectric, magnetic, or magnetodielectric substrate.
  • the cavity includes an aperture and walls.
  • the Sys1a antenna system also includes an antenna Ant disposed on the dielectric, magnetic, or magnetodielectric substrate.
  • the antenna is a planar antenna, but the invention is not restricted to these examples, and 3D antennas could be used.
  • the substrate is a so-called low-loss dielectric substrate, for example a substrate whose dielectric loss angle tangent (tan ⁇ ) is less than 10 ⁇ 2 .
  • This substrate can also be either magnetic or magnetodielectric.
  • the cavity can also be filled with electromagnetic absorber and/or a partial resistive film can be placed in it.
  • Ant antennas can be of various types, such as planar antennas.
  • a planar Ant antenna can be a spiral antenna, a sinuous antenna, or a planar periodic antenna. It can, for instance, be composed of different current rings corresponding to different frequencies, with the perimeter of a given ring equal to the wavelength of the corresponding frequency. The outer rings thus correspond to low frequencies, and the inner rings to high frequencies.
  • This type of spiral therefore allows the antenna to operate over a wide frequency band, within which the different rings contribute to the radiation for different frequencies depending on their diameter (for a wavelength ⁇ , it is a ring-shaped area of circumference ⁇ that will contribute to the radiation).
  • the Ant antenna can be a transmitting or receiving antenna.
  • FIG. 2 represents an example of a spiral antenna in a set of embodiments of the invention.
  • FIG 2 represents an example of such a spiral antenna comprising two strands Strand1 and Strand2, said antenna being printed on the dielectric substrate Subs of thickness h1 and diameter d1.
  • the X, Y, and Z axes represent three axes of an orthogonal coordinate system, where Z is the antenna axis.
  • the X and Y axes correspond to the antenna plane and can be defined, for example, by the geometry of the spiral's excitation points.
  • these same three axes, X, Y, and Z will be represented in several figures.
  • the "top” of the system will be considered to correspond to high values on the z-axis, and the "bottom” to low values.
  • an element will be considered “on” or “above” another if its position is higher on the z-axis, and conversely, "below” or “under” another if its position is lower on the z-axis.
  • FIG. 3 represents an example of a so-called reference section of an antenna system in a set of embodiments of the invention.
  • the so-called reference section comprises a metallic cavity Cav, on which the dielectric substrate Subs is placed, and in which the planar antenna Ant is printed.
  • the antenna can operate at different frequencies, and at a given frequency, a specific area of the antenna will participate in the radiation. For example, in a spiral antenna, for a wavelength ⁇ , a ring-shaped area of circumference ⁇ will contribute to the radiation.
  • the Sys1a antenna system also includes a peripheral absorbing ring, not visible on the figure 3 , positioned between the antenna and the walls of the cavity.
  • peripheral absorbing ring helps to trap the end-strand effects, thus limiting the open-circuit effect. Indeed, these effects, by recombining locally with the rest of the radiating circuit towards the center of the antenna, can lead to mismatch and a loss of radiation efficiency depending on the frequency.
  • the Sys1a antenna system also includes an absorbing half-lens Lent1a having the shape of an angular sector and comprising a basic element covering substantially a first part of the cavity opening, a second part of the cavity opening not being covered by said basic element.
  • the first part of the cavity opening corresponds to half of the cavity opening.
  • the electromagnetic waves emitted by the antenna will be affected, in the half of the cavity covered by the half-lens, by a phase shift, while they will not be modified in the half not covered by the half-lens.
  • peripheral absorbing ring and the absorbing half-lens can be joined together, forming a single absorbing element, or be formed from two separate elements.
  • the peripheral absorbing ring and the absorbing half-lens can be made of a partially absorbing dielectric material.
  • an absorbent material containing carbon can be used.
  • This type of material has the advantage of possessing absorbent properties while also being compatible with 3D printing, making the antenna system more flexible to reproduce and modify.
  • the half-lens can be integral with the Cav cavity and the Ant antenna, in which case the Sys1a system is formed from a single device.
  • the half-lens can instead be located in a device independent of that of the antenna.
  • the half-lens can be positioned slightly above the antenna. This allows the half-lens to be integrated into existing antenna systems. For instance, the half-lens can be integrated into a radome that is added above a pre-existing antenna.
  • FIG. 4 represents an example of a metallic cavity in a set of embodiments of the invention.
  • the cavity Cav is cylindrical in shape, with a diameter d1 and a height h2.
  • the metallic cavity has a bottom 410 and metallic walls 420.
  • the cavity could be square.
  • the cavity's ground plane could be planar or not. In the latter case, the cavity's depth might be shallower towards its center.
  • the cavity could be conical.
  • FIG. 5 represents an example of an absorbing peripheral ring in a set of embodiments of the invention.
  • the peripheral absorbing ring Cour is in the form of a hollow cylinder.
  • the hollow cylinder has a height h2 and an outside diameter d1, respectively identical to the height and outside diameter of the metallic cavity Cav shown in figure 4 , and a thickness w1, corresponding to an inner diameter d1 - w1.
  • the peripheral absorbing ring shown in figure 5 can therefore be placed in the metallic cavity shown in figure 4 , and absorb electromagnetic waves between the antenna and the lateral 420 of the metallic cavity.
  • FIG. 6 represents an example of a basic element of an absorbing half-lens in a set of embodiments of the invention.
  • the basic element Bas of the absorbing half-lens is presented here as a half-cylinder of thickness h4 and diameter d2 > d1.
  • the basic element can therefore close half of the metallic cavity.
  • the basic element thus contributes to the deflection of the beam.
  • the basic element can serve as a support for other lens elements such as those shown in figure 8
  • the base element is the only element of the half-lens that closes the metallic cavity.
  • the height of the base element can be defined according to the desired beam deflection. In particular, certain heights can favor beam deflection in certain frequency bands; the height h4 can therefore be defined according to a frequency band to be preferentially deflected.
  • FIG. 7 represents an example of an annular element in a set of embodiments of the invention.
  • the absorbing half-lens is arranged on an annular element forming an extension of the peripheral absorbing ring out of the cavity to the base element.
  • the absorbing half-lens and the annular element may be joined together to form a single element, or be two separate elements placed side by side.
  • the annular element Ann is a hollow cylinder with an outer diameter d1, a thickness w1, and a height h3. It is therefore a hollow half-cylinder with the same outer diameter and thickness as the hollow half-cylinder of the peripheral ring shown in figure 5 , which extends it out of the metal cavity, up to the base element, and thus forms a support for the base element.
  • This annular element therefore absorbs the reflections from the antenna, while fixing the other elements of the lens and maintaining a fixed distance between the antenna and the base element of the half-lens.
  • the half-lens and the annular element When the half-lens and the annular element are joined, this also allows the half-lens to be manufactured without requiring a mechanical interface between its lower face and the upper face of the radiating circuit.
  • the monobloc assembly of the half-lens and the annular element reduces the assembly interfaces along the axis perpendicular to the radiating circuit, while also allowing precise selection of the air gap between the upper face of the radiating circuit and the lower face of the half-lens: for example, there is no need for a foam-glue-glue film between the radiating circuit and the half-lens.
  • FIG 8 represents an example of a set of circular sector elements of an absorbing half-lens in a set of embodiments of the invention.
  • the absorbing half-lens comprises at least one circular sector element whose thickness varies according to the distance to the center of the half-lens.
  • the antenna whether transmitting or receiving, can process frequencies that depend on the distance from the antenna's center, and therefore from the center of the half-lens.
  • a spiral, wavy, or log-periodic antenna for which the active area at a given wavelength has a ring shape whose diameter corresponds to that wavelength, with the lower rings corresponding to low frequencies and the inner rings to high frequencies.
  • the thickness of the lens also plays a role. allows the beam to be deflected more or less depending on the frequencies of the electromagnetic waves.
  • Adjusting the thickness of the half-lens according to the distance from the center allows the beam deflection to be locally adapted to the frequency of the waves emitted at a given distance from the antenna center. This makes it possible to obtain a beam deflection that is coherent over a wide frequency band.
  • the half-lens comprises a plurality of circular sector elements whose thickness is defined by an increasing function of an angular distance from the edges of the lens.
  • Each circular sector element is defined by a thickness profile that depends on the distance from the center of the half-lens, and the thickness is defined by an increasing function of an angular distance from the edges of the lens (the angular distance being, for example, represented by the angle ⁇ from the right edge of the half-lens), that is to say, in the example of the figure 8 , at a given distance from the center, the thickness of element 8a will be greater than the thicknesses of elements 8b, which are themselves greater than the thicknesses of elements 8c, which are themselves greater than the thicknesses of elements 8d, which are themselves greater than the thicknesses of elements 8e.
  • Using a plurality of circular sector elements whose thickness is defined by an increasing function of the angular distance from the lens edges limits the frequency dependence of the angular deviation of the main radiation lobe. This also restricts discontinuities along the spiral strands, thus avoiding impedance mismatches.
  • FIG 9 represents an example of a profile view of a set of circular sector elements of an absorbing half-lens in a set of embodiments of the invention.
  • figure 9 represents more precisely a profile view of the circular sector elements (or sectors) 8a, 8b, 8c, 8d and 8e shown in figure 8
  • the figure 9 represents the thickness of the profile as a function of the distance from the center of the half-lens, the distance being shown increasing from left to right.
  • each circular sector element is defined by a thickness function that increases and then decreases as a function of a distance to the center of the half-lens.
  • the distance ds3 can, for example, correspond substantially to the antenna radius. This allows for an increasing thickness of the half-lens with the The distance from the center of the antenna, and therefore the wavelength of the waves used locally by the antenna, is a factor. This allows for a significant thickness for low frequencies and a smaller thickness for high frequencies. This results in a homogeneous beam deflection over a wide frequency band.
  • FIG. 10 represents an example of an overview of an antenna system comprising a set of circular sector elements of an absorbing half-lens in a set of embodiments of the invention.
  • the basic element of the half-lens is located either in the plurality of circular sector elements, and the peripheral absorbing ring is inside the walls of the metallic cavity.
  • FIG 11a represents an example of radiation patterns of a state-of-the-art antenna at different frequencies, without deflection of the antenna beam.
  • FIG 11b represents an example of radiation patterns of an antenna at different frequencies, with deflection of the antenna beam by an antenna system in a set of embodiments of the invention.
  • the figures 11a to 18 correspond to 3D electromagnetic simulations performed on a model of an antenna system according to the invention. They are given solely as illustrative and non-limiting examples of the results obtained by an antenna system according to the invention; different results that can be obtained in other embodiments of the invention (for example, with another type of antenna, or other dimensions).
  • Each of the 6 diagrams shown on the figures 11a And 11b corresponds to a given frequency, from left to right and top to bottom, 3.5 GHz, 4.5 GHz, 5.5 GHz, 6.5 GHz, 7.5 GHz, and 8.5 GHz.
  • figure 11a represents the diagram without deviation
  • the figure 11b the diagram with deviation.
  • the deviation is represented by the roll angle ⁇ and the site angle ⁇ .
  • FIG 11b shows that the system according to the invention does allow a deviation of the radiation pattern of the antenna, and that this deviation is quite homogeneous over a wide frequency band, in this example from 3.5 GHz to 8.5 GHz.
  • FIG 12 represents two cross-sections of a 3D representation of the main lobe of the radiation pattern of an antenna deflected by an antenna system in a set of embodiments of the invention.
  • the two sections correspond to sections along the planes defined by the X and Y axes, and the X and Z axes respectively.
  • This example shows that the system according to the invention makes it possible to deflect the antenna beam, both according to the roll angle ⁇ and the site angle ⁇ .
  • FIG 13 represents an example of a deflection angle obtained by an antenna system as a function of frequency in a set of embodiments of the invention.
  • FIG 14 represents an example of an angular deflection angle obtained by an antenna system as a function of frequency in a set of embodiments of the invention.
  • the angular deviation angle is between 340° and 25°, and can therefore be limited over the entire frequency band.
  • FIG. 15 represents an example of antenna gain obtained by an antenna system as a function of frequency in a set of embodiments of the invention.
  • the antenna gain is represented on the vertical axis, in dB, as a function of frequency, on the horizontal axis, in GHz.
  • the radiated gain is typically greater than 2 dB, which shows that the half-lens allows us to obtain the angular deviation shown.
  • Figure 13 without significant degradation of the radiated gain level. It is also observed that there is no gain dip depending on the frequency: this shows that the addition of the half-lens does not create any additional destructive interference with the lower ground plane of the antenna cavity.
  • FIG 16 represents an example of axial ratio obtained by an antenna system as a function of frequency in a set of embodiments of the invention.
  • the axial ratio is represented on the vertical axis, in dB, as a function of frequency, on the horizontal axis, in GHz.
  • FIG 17 represents an example of -3dB lobe width obtained by an antenna system as a function of frequency in a set of embodiments of the invention.
  • the lobe width is represented on the vertical axis, in dB, as a function of frequency, on the horizontal axis, in GHz.
  • the half-lens therefore creates an angular deviation of the main radiation lobe but does not alter the angular opening domain at half power in the radiation planes studied, with a rather stable angular opening in frequency.
  • FIG. 18 represents an example of impedance matching obtained by an antenna system as a function of frequency in a set of embodiments of the invention.
  • the matching is represented on the vertical axis, in dB, as a function of frequency, on the horizontal axis, in GHz.

Landscapes

  • Aerials With Secondary Devices (AREA)

Claims (12)

  1. Antennensystem (Sys1a, Sys1b, Sys10), umfassend:
    - eine Grundplatte mit einem von einem dielektrischen, magnetischen oder magneto-dielektrischen Substrat (Subs) abgedeckten Hohlraum (Cav), wobei der Hohlraum eine Öffnung und Wände umfasst;
    - eine Antenne (Ant), die auf dem dielektrischen, magnetischen oder magneto-dielektrischen Substrat angeordnet ist;
    - einen absorbierenden peripheren Kranz (Cour), der zwischen der Antenne und den Wänden angeordnet ist;
    - eine absorbierende halbe Linse (Lentla, Lent1b), die eine Form eines Winkelsektors aufweist, der ein Basiselement (Bas) umfasst, das einen ersten Teil der Öffnung des Hohlraumes und einen ersten Teil der Antenne abdeckt, wobei ein zweiter Teil des Hohlraums und ein zweiter Teil der Antenne nicht von dem Basiselement abgedeckt sind.
  2. Antennensystem nach Anspruch 1, wobei die absorbierende halbe Linse ein Ringelement (Ann) umfasst, das eine Fortsetzung des absorbierenden peripheren Kranzes auf dem zweiten Teil der Öffnung bildet.
  3. Antennensystem nach Anspruch 1, wobei der erste Teil der Öffnung des Hohlraums der Hälfte der Öffnung des Hohlraums entspricht.
  4. System nach Anspruch 1, wobei die absorbierende halbe Linse mindestens ein Kreissektorelement (Sect) umfasst, dessen Dicke sich in Abhängigkeit vom Abstand zur Mitte der halben Linse ändert.
  5. System nach Anspruch 4, wobei die absorbierende halbe Linse eine Vielzahl von Kreissektorelementen umfasst, deren Dicke durch eine steigende Funktion eines Winkelabstands von den Rändern der Linse definiert ist.
  6. System nach einem der Ansprüche 4 oder 5, wobei jedes Kreissektorelement durch eine in Abhängigkeit vom Abstand zur Mitte der halben Linse steigende und dann abnehmende Funktion definiert ist.
  7. Antennensystem nach einem der vorstehenden Ansprüche, wobei mindestens ein Element aus dem absorbierenden peripheren Kranz, und der halben Linse aus einem teilweise absorbierenden dielektrischen Werkstoff gefertigt ist.
  8. Antennensystem nach Anspruch 7, wobei der dielektrische Werkstoff teilweise Kohlenstoff umfasst.
  9. Antennensystem nach einem der vorstehenden Ansprüche, wobei die Antenne eine Spiralantenne, eine sinusförmige Antenne oder eine periodische Antenne ist.
  10. Antennensystem nach Anspruch 9, wobei die Antenne eine durch eine Archimedische Spirale definierte ist.
  11. Antennensystem nach einem der vorstehenden Ansprüche, wobei die Antenne eine Breitbandantenne ist, die es ermöglicht, einen konstanten Ablenkungswinkel über die Gesamtheit des Betriebsfrequenzbandes der Antenne zu erhalten.
  12. Antennensystem nach einem der vorstehenden Ansprüche, umfassend:
    - eine erste Vorrichtung, welche die Grundplatte, die Antenne und den absorbierenden peripheren Kranz umfasst;
    - eine zweite Vorrichtung, welche die absorbierende halbe Linse umfasst.
EP22193180.1A 2021-09-09 2022-08-31 Elektromagnetisches system mit winkelabweichung der hauptkeule einer antenne Active EP4148902B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2109426A FR3126818B1 (fr) 2021-09-09 2021-09-09 Système électromagnétique avec déviation angulaire du lobe principal de rayonnement d'une antenne

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EP4148902A1 EP4148902A1 (de) 2023-03-15
EP4148902B1 true EP4148902B1 (de) 2025-11-26

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3145065B1 (fr) * 2023-01-13 2025-09-05 Thales Sa Système antennaire comportant une antenne et un dispositif passif de déviation angulaire d'un lobe principal de rayonnement de l'antenne

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2372841A1 (de) * 2010-03-29 2011-10-05 Kabushiki Kaisha Toshiba Spiralantenne

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5162806A (en) * 1990-02-05 1992-11-10 Raytheon Company Planar antenna with lens for controlling beam widths from two portions thereof at different frequencies
US6862004B2 (en) 2002-12-13 2005-03-01 Broadcom Corporation Eccentric spiral antenna and method for making same
US8780012B2 (en) * 2009-06-30 2014-07-15 California Institute Of Technology Dielectric covered planar antennas
JP5496941B2 (ja) * 2011-03-25 2014-05-21 東芝電波プロダクツ株式会社 スパイラルアンテナ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2372841A1 (de) * 2010-03-29 2011-10-05 Kabushiki Kaisha Toshiba Spiralantenne

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FR3126818A1 (fr) 2023-03-10
FR3126818B1 (fr) 2024-02-23

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