EP3788674A1 - Antenne filaire large bande - Google Patents
Antenne filaire large bandeInfo
- Publication number
- EP3788674A1 EP3788674A1 EP19720680.8A EP19720680A EP3788674A1 EP 3788674 A1 EP3788674 A1 EP 3788674A1 EP 19720680 A EP19720680 A EP 19720680A EP 3788674 A1 EP3788674 A1 EP 3788674A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- resistive
- patterns
- antenna
- empty
- gate
- 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.)
- Pending
Links
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—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
-
- 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
- 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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/10—Logperiodic antennas
- H01Q11/105—Logperiodic antennas using a dielectric support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/006—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
-
- 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
Definitions
- the present invention relates to a wire antenna capable of operating in at least one predetermined frequency band, comprising a plurality of superposed layers.
- the invention finds applications in particular in the field of electromagnetic listening systems.
- the antennas which are used either singly or in a goniometric network, must operate in a very wide frequency band and in a circular polarization, linear or double linear, respectively corresponding to the ranges of interest of electromagnetic signals in frequency and polarization.
- These antennas must have the smallest possible footprint and, in particular, a low thickness, in particular to be more easily integrated on carriers. They must also have radiation performance (gain, quality of radiation patterns, etc.) reproducible from one antenna to another, especially for network applications or to allow replacement during a maintenance operation. .
- the radiating element consists of a wire which is shaped to describe, in a so-called radiation surface, a spiral-type or log-periodic pattern.
- the wire is wound on itself so as to form a spiral view in top view.
- This spiral can for example be an Archimedean spiral, a logarithmic spiral, or other.
- the wire is shaped so as to have, in top view, several strands.
- Each strand is inscribed in an angular sector, extends radially and has indentations. The length of each tooth and the distance between two successive teeth of a strand follow a logarithmic progression.
- the metallic wire which is the radiating element is produced by etching a thin metal layer, for example a copper layer with a thickness of between 2 and 20 ⁇ m (micrometers), deposited on a layer thin, insulating (dielectric) support.
- first wired antennae with an absorptive cavity in which the radiating element, etched on a planar or shaped radiation surface, is situated above an absorbent cavity delimited by walls. metal and filled with electromagnetic wave absorbing material.
- the radiating element is adapted to emit a wave propagating towards the front of the radiating surface (away from the absorbing cavity) and a wave propagating towards the rear of the radiating surface (towards the absorbent cavity). The latter is absorbed by the absorbent cavity.
- Such an antenna has a large footprint because of the dimensions of the absorbent cavity. It also has a low efficiency since half of the power emitted by the radiating element is absorbed in the absorbent cavity. Finally, the reproducibility of the radio performance of such an antenna is difficult to obtain because of a lack of control of the electromagnetic characteristics of the absorbent material filling the cavity.
- the radiating elements are placed on a charged band electromagnetic structure, called LEBG (for Loaded Electromagnetic Band Gap), on a lower ground plane.
- LEBG for Loaded Electromagnetic Band Gap
- a surface composed of periodic metal patterns connected by resistors is placed in the cavity of the antenna.
- the wave emitted backwards by the radiating element is absorbed in a thin layer consisting of a metallic reflector plane surmounted by metal and LEBG material charged by resistors.
- the radiating element is etched on a high impedance surface (SHI), based on spaced periodic metal patterns, placed in the antenna cavity and connected to the ground plane by metallic bonds, also called vias.
- SHI high impedance surface
- the efficiency band of such an antenna in which the interference between the incident wave and the reflected wave is constructive corresponds substantially to an octave. Therefore, this type of antenna is limited to narrow bands of operation, and does not cover simultaneously a multi-octave frequency band.
- a fourth wire antenna of the prior art described in the patent application FR3017493, it has been proposed to intercalate, between the broadband radiating element and the spacer substrate layer, one or more layers together.
- periodic resistive patterns either with a single set of resistive patterns or several sets of nested resistive patterns.
- such a layer comprises resistive patterns having resistance values gradually varying between an antenna center point and an outer edge of the antenna.
- the resistive patterns are placed in the near field of the radiating element of the antenna.
- the antennas obtained are compact and allow to obtain a large gain over a wide frequency band, without significant ripple radiation patterns.
- these antennas have surface waves (or creeping waves) that propagate at the lower ground plane of the antenna cavity, and beyond on the metal support on which the antenna is mounted.
- These surface waves associated with structural edge effects combine with the main electric field radiated by the antenna and result in a degradation of the quality of the radiation pattern. Indeed, wave effects, all the more important as the frequency is high, appear in the main lobe of the radiation pattern. Thus, the antenna gain is degraded, as well as the angular aperture at half power for the main lobe of radiation.
- the object of the invention is to correct the aforementioned problems by proposing a compact wire antenna capable of operating in a wide frequency band for which the effects of the surface waves are controlled in order to eliminate the defects mentioned above.
- the invention proposes a wire antenna adapted to operate in at least one frequency band, comprising a plurality of superimposed layers, comprising at least one radiating element placed on a support layer, said support layer being placed on a spacer substrate placed on a reflective plane.
- This antenna comprises at least one resistive resistive surface grid of predetermined resistance, comprising at least one set of non-contiguous repeating empty patterns, said resistive gate being placed between the spacer substrate and the reflective plane.
- the wire antenna according to the invention thanks to the presence of a resistive gate with empty patterns which makes it possible to trap and / or attenuate the surface waves, has an increased gain.
- the wire antenna according to the invention may have one or more of the following characteristics, taken independently or in combination, in any technically acceptable combination.
- the antenna has a resistive peripheral area surrounding the one or more sets of empty patterns.
- All the empty patterns of at least one set of said grid have the same geometric shape and are regularly spaced.
- the antenna comprises a central axis orthogonal to the superimposed layers, said resistive gate having at least two concentric sets of empty patterns, each set comprising empty patterns of square shape and of the same size, the size of the empty patterns being different between two concentric sets. different, the size of the empty patterns of a said set being increasing as a function of the distance of said assembly relative to said central axis of the antenna.
- Each set of square empty patterns of the same size corresponds to an operating frequency subband of the antenna having an associated center frequency and an associated wavelength, and the patterns are squares of side less than or equal to said length. wave.
- the resistive grid forms a first resistive layer
- the antenna further comprising a second resistive layer placed between the support layer of the radiating element and the spacer substrate, the said second resistive layer comprising at least one set of resistive units of the same value.
- resistance element occupying a partial area of said second resistive layer, and the or each set of empty patterns of the first resistive layer is placed facing a zone devoid of resistive patterns of said second resistive layer.
- the antenna comprises a first resistive gate comprising a first set of empty patterns interposed between a first spacer substrate and a second spacer substrate, and a second resistive gate, comprising at least a second set of empty patterns, interposed between the second spacer substrate and the reflective plane the first set of empty patterns being placed opposite a non-resistive zone of the second resistive gate, the second set of empty patterns being placed opposite a non-resistive zone of the first resistive gate.
- the or each resistive gate has a resistive surface made by depositing a resistive ink in which said empty patterns are formed by recess.
- the or each resistive gate is made by screen printing or by 3D printing.
- the radiating element is wired, wound in a spiral, log-periodic or sinuous winding.
- FIG. 1 is a cross-sectional view of a wire antenna according to a first embodiment of the invention
- FIG. 2 is a perspective representation of a wire antenna according to the first embodiment
- FIG. 3 is an exploded perspective representation of a wire antenna according to the first embodiment
- FIG. 4 is a top view of a resistive grid according to a first embodiment
- FIG. 5 is a top view of a resistive grid according to a second embodiment
- FIG. 6 is a cross-sectional view of a wire antenna according to a second embodiment of the invention.
- FIG. 7 is a perspective representation of a wire antenna according to the second embodiment.
- Figure 8 is a schematic representation in top view of the wire antenna of Figure 7;
- FIG. 9 is a cross-sectional view of a wire antenna according to a third embodiment of the invention.
- Figures 1 to 3 show schematically a wire antenna 2 according to a first embodiment of the invention, in cross section, in perspective view and exploded perspective view.
- the wired antenna 2 is a broadband antenna of frequency, for example, able to operate in a frequency range of 1 GHz (GigaHertz) to 20 GHz.
- the wire antenna 2 has the shape of a disk of circular circumference, of center O and is composed of several concentric layers stacked in thickness along an axis A.
- the axis A is a central axis orthogonal to the plane of radiation of the antenna.
- the antenna 2 has an outside diameter of
- the antenna has another regular geometric shape, for example elliptical or rectangular, also having a similar central axis of symmetry.
- a radiating element 4 disposed in a flat surface S, also called a radiating surface, is positioned on a planar support layer 6, itself disposed above a spacer substrate 8.
- the support layer 6 is for example formed by a first dielectric substrate, for example of the ceramic type reinforced with glass fibers, having a first thickness h1, for example between 0.128 mm and 1.524 mm, for example equal to 0.254 mm. mm.
- the spacer substrate 8 is disposed above a reflective plane or ground plane 10.
- the reflective plane 10 is preferably metallic and is located at a distance h 0 below the radiation surface S. Its function is to reflect any incident wave irrespective of its frequency in a given frequency range.
- the spacer substrate 8 has the general external shape of a disk of axis A and of second thickness substantially constant h2.
- This spacer substrate is a second dielectric substrate of given relative permittivity.
- it consists of a dielectric material of low relative permittivity (e.g. uncharged foam) or a dielectric material of Duroid type (trademark) or a possibly multilayer composite material.
- the second thickness h2 of the spacer substrate 8 is greater than the first thickness h1 of the support layer 6.
- the thickness of the spacer substrate 8 is between 4 mm and 8 mm, for example equal to 6 mm.
- the spacer substrate 8 is made of a pure magneto-dielectric or magnetic material.
- the spacer substrate 8 is formed of a progressive dielectric material or drilled, recessed at its center, so as to achieve a relative permittivity increasing from the center to the outer edge.
- a resistive gate 12 Between the reflector plane 10 and the spacer substrate 8 is a resistive gate 12, having a resistive surface 14 of predetermined resistivity value and at least one set of recesses (or holes) repetitive 18 non-contiguous so as to form said grid.
- the recesses 18 are areas devoid of resistivity, hereinafter called empty patterns.
- the recesses 18 are made by the absence of resistive material deposit.
- the resistive gate 12 is, according to a first embodiment, disposed on a face 16 of the spacer substrate 8, or lower face, oriented towards the reflector plane 10.
- the resistive gate 12 is disposed on a face 20 of the reflector plane 10, referred to as the upper face and oriented towards the radiating element 4.
- the resistive gate is placed on a third dielectric, magnetic or magneto-dielectric substrate interposed between the face 6 of the spacer 8 and the face 20 of the reflector plane 10.
- the resistive gate 12 is disposed in a so-called cavity bottom zone, between the spacer substrate 8 and the reflector plane 10.
- the resistive gate 12 is made from a resistive film
- the empty patterns 18 are for example made by recess of the resistive film.
- the resistive grid is produced by depositing a resistive ink according to a pattern, so as to form the desired empty patterns by the absence of resistive ink deposition.
- the resistive gate 12 is produced by conventional screen printing or any other equivalent method, for example 3D printing or aerosol printing.
- the resistive gate 12 has a third thickness h3, which may vary between a few micrometers and a few tens of micrometers depending on the desired resistance value and according to the intrinsic characteristics of the resistive ink used.
- the radiating element 4 comprises in this first embodiment of the first and second metal wires 22 and 24 which are respectively shaped according to a pattern of the spiral type or serpentine log-periodic type, for example. More particularly, the pattern forms an Archimedean spiral in the first embodiment, as illustrated in Figures 1 to 3.
- Each wire, 22, 24, is wound around the origin point O, which corresponds to the intersection of the axis A and the radiation surface S.
- the radiating element 4 is for example made by an etching operation, directly on the upper face 19 of the support layer 6.
- the radiating element is a single polarization or double polarization element of the DuHamel sinuous type.
- the radiating element is hybrid.
- a supply device (not shown) for the radiating element 4 is positioned below the reflector plane 10, which is electrically connected to ground.
- the reflector plane 10 and the layers 12, 8, 6 positioned above are pierced with a hollow passage 28, along the axis A, for the passage of wire (s) conductor (s) for powering electrically the radiating element 4.
- an active zone of the radiating element 4 emits a first direct wave propagating forwards, that is to say opposite the spacer substrate 8, and a second wave propagating towards the rear , that is to say in the direction of the spacer substrate 8.
- the second wave passes through the spacer substrate 8 and the resistive gate 12 is reflected by the reflector plane 10, then crosses again the resistive gate 12 and the spacer substrate 8.
- the resistive gate 12 comprises regular empty patterns 18 arranged in this embodiment on concentric rings of center O ', and a non-resistive central zone 30, comprising the recessed passage 28.
- the resistive layer 12 comprises a peripheral zone 32, annular in this first embodiment, which does not comprise empty patterns, in other words it is a solid resistive zone, for a better absorption efficiency of the surface waves in this area.
- the peripheral zone is located near the outer edge of the antenna, for example between the outer edge of the antenna and the resistive grid.
- the empty patterns 18 are distributed on concentric rings forming, by ring, sets of empty patterns of the same size and geometric shape, distributed regularly over the ring. In addition to all the rings, the empty patterns are aligned radially, and corresponding to the same angular width.
- the resistive gate 12 comprises empty patterns 34, 36 of square shape as illustrated in FIG.
- the resistive grid 12 comprises a resistive surface 15, and two sets of empty patterns, a first set 33 of first square-shaped patterns 34 and a second set 35 of second square-shaped patterns 36.
- the patterns are arranged according to an orthogonal pattern, spaced regularly between two successive patterns.
- the resistive surface has a resistivity of 1000 W per square.
- the first set of empty patterns forms a first outer zone, close to the outer edge of the grid, and the second set of empty patterns forms a second square-shaped inner zone.
- the circular zone 30 In the center of the grid is located the circular zone 30, which, in one embodiment corresponds to the recessed passage 28. According to one variant, the circular zone 30 has a diameter greater than the diameter of the hollow central passage 28. The circular zone 30 corresponds to to a recessed (non-resistive) surface.
- the first square patterns 34 are of surface greater than the surface of the second square patterns 36.
- the first patterns 34 are square with 6.4 mm sides, and are positioned in an active zone for the antenna going, approximately, from 2 GHz to 4 GHz
- the second patterns 36 are 3.2 mm square and are positioned in an active area for the antenna ranging from about 4 GHz to 18 GHz.
- the empty patterns are periodized and of dimensions (sides of the squares) smaller than the wavelength associated with the central frequency of the sub-band considered radiated by the antenna.
- the radio performance of the antenna is improved in a frequency range from 2 GHz to 18 GHz.
- the main lobe of the antenna pattern is formed over the entire frequency band considered.
- the undulations of diagrams are not present in vertical polarization and not important in horizontal polarization.
- the resistive gate 12 comprises annular empty patterns 42 interposed between resistive rings 44. It is a concentric ring topology, the annular empty patterns 42 being alternately regular with the resistive rings 44.
- This embodiment is particularly suitable for a spiral radiating element.
- the heights h1 and h2 of the constituent materials of the antenna are chosen to have constructive interferences between the spiral-type radiating element and the reflector plane (lower ground plane of the antenna) in the frequency band of the antenna. 'interest.
- the shape, the size and the pattern of spatial repetition or topology of the empty patterns are variable and defined, for each embodiment, using a 3D electromagnetic simulation software or electromagnetic simulator. Indeed, an analytical predimensioning of the resistive units is particularly complex. In general, given a range of frequencies to be covered and / or a desired antenna gain, a resistivity value of the resistive gate, an empty pattern geometric shape and a repetition pattern topology are chosen, and the size of the patterns and the spacing of the patterns are calculated using 3D electromagnetic simulation software.
- Such simulation software is known, for example software that solves the Maxwell equations in integral form, using the finite integral method.
- the size and topology of the empty patterns are selected to improve the stability of the radiation pattern and to promote the absence of ripple, which reflects effective trapping of surface waves.
- these choices are made by implementing several simulations and comparing the results to select the size, shape and spacing of the empty patterns best suited for a targeted application.
- FIGS 6 to 8 schematically illustrate a wire antenna 2 'according to a second embodiment of the invention.
- the antenna 2 'further comprises a second resistive layer 48, between the support 6 and the spacer substrate 8, comprising a set 50 of resistive patterns 52, each resistive pattern 52 having a resistance resistive surface given.
- Each resistive pattern is made for example by depositing a resistive ink, and the spaces between resistive patterns are empty.
- the first resistive gate 12 comprises two resistive sub-grids 54, 56, each formed of a resistive surface having recesses which form empty patterns 62, 64 and 66.
- the assembly 50 of the second resistive layer 48 is placed above a separation zone 60 between the first resistive sub-grid 54 and the second resistive sub-grid 56, this separation zone 60 being an empty zone, devoid of resistive layer, above the reflector plane 10.
- each resistive sub-grid 54, 56 comprises at least one set of empty patterns placed opposite a zone devoid of resistive patterns 52 of the resistive layer 48, thus a "void" zone, without resistance.
- the set 50 of resistive patterns of the resistive layer 48 forms a spatially nested zone between the first sub-grid 54 and the second sub-grid 56. There is no spatial superposition, in top view, between the zone formed by the assembly 50 and the first sub-grid 54 and the second sub-grid 56.
- the first sub-grid 54 comprises square empty patterns 62 aligned in a square crown.
- the first sub-grid 54 has a zone 30 centered on the axis A, without resistance, as in the first embodiment.
- the resistive patterns 52 of the resistive layer 48 are square in shape with the same dimensions as the empty patterns 62 of the first sub-grid 54.
- the second sub-grid 56 comprises a resistive peripheral zone 32 without recess, and two sets of empty square patterns 64 and 66 of different sizes.
- each resistive subgrid has a resistivity of 1000 W per square.
- the two resistive sub-grids 54, 56 respectively cover the frequency bands from 2GHz to 4GHz, and from 10GHz to 18GHz.
- the set 50 of resistive patterns 52 placed between the spacer substrate 8 and the support 6 covers the frequency band from 4GHz to 10GHz.
- hybrid cavity antenna favors an absence of ripple radiation patterns over the entire frequency band considered.
- Variations of this embodiment can be envisaged, for example by adding a resistance gradient or a multilayer structuring of the resistive gate 12.
- resistive gate having a progressive variation in resistance and decreasing between a high resistance value at the periphery and a lower value at its center.
- FIG. 9 schematically illustrates, in cross-section, a multilayer structuring of a resistive gate according to a third embodiment of a wire antenna according to the invention.
- the antenna 2 "of FIG. 9 comprises a radiating element 4 placed on a planar support 6, itself arranged on a first spacer substrate 8.
- first resistive gate 12A Between the first spacer substrate 8 and the reflector plane 10 are stacked a first resistive gate 12A, a second spacer substrate 8 'and a second resistive gate 12B.
- the first resistive gate 12A comprises a set 68 of empty patterns, for example a central crown, placed opposite a zone 70 without resistance (zone empty) of the second resistive gate 12B.
- the second resistive gate 12B comprises a set 72 of empty patterns, arranged for example in a peripheral ring, facing a zone without resistance (empty area) of the first gate 12A.
- the antenna comprises a resistive gate between the reflective plane 10 and the spacer substrate 8 or 8 ', but the resistive gate does not have a solid resistive peripheral zone.
- the resistive grids are made by conventional screen printing or any other equivalent method, for example 3D printing or aerosol printing.
- each resistive gate is deposited either directly on the reflector plane 10, or on the lower face 16 of the spacer substrate 8, or on a dielectric, magnetic or magneto-dielectric substrate placed on the reflector plane 10.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Aerials With Secondary Devices (AREA)
- Details Of Aerials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1800429A FR3080959B1 (fr) | 2018-05-04 | 2018-05-04 | Antenne filaire large bande |
PCT/EP2019/061399 WO2019211446A1 (fr) | 2018-05-04 | 2019-05-03 | Antenne filaire large bande |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3788674A1 true EP3788674A1 (fr) | 2021-03-10 |
Family
ID=63722434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19720680.8A Pending EP3788674A1 (fr) | 2018-05-04 | 2019-05-03 | Antenne filaire large bande |
Country Status (5)
Country | Link |
---|---|
US (1) | US11495887B2 (fr) |
EP (1) | EP3788674A1 (fr) |
FR (1) | FR3080959B1 (fr) |
IL (1) | IL278362B2 (fr) |
WO (1) | WO2019211446A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20210117368A (ko) * | 2020-03-18 | 2021-09-29 | 삼성디스플레이 주식회사 | 무선 주파수 소자 및 이를 포함하는 표시 장치 |
FR3143219A1 (fr) * | 2022-12-07 | 2024-06-14 | Thales | Système antennaire amélioré et dispositif de découplage associé |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10034547A1 (de) | 2000-07-14 | 2002-01-24 | Univ Karlsruhe | Breitbandantenne |
US7612676B2 (en) * | 2006-12-05 | 2009-11-03 | The Hong Kong University Of Science And Technology | RFID tag and antenna |
FR2922687B1 (fr) * | 2007-10-23 | 2011-06-17 | Thales Sa | Antenne compacte a large bande. |
FR2965669B1 (fr) * | 2010-10-01 | 2012-10-05 | Thales Sa | Reflecteur d'antenne large bande pour une antenne filaire plane a polarisation circulaire et procede de realisation du deflecteur d'antenne |
US9444147B2 (en) * | 2011-07-18 | 2016-09-13 | The United States Of America As Represented By The Secretary Of The Army | Ultra-wide-band (UWB) antenna assembly with at least one director and electromagnetic reflective subassembly and method |
FR3017493B1 (fr) * | 2014-02-07 | 2017-06-23 | Thales Sa | Antenne filaire compacte a motifs resistifs |
FR3052600B1 (fr) * | 2016-06-10 | 2018-07-06 | Thales | Antenne filaire large bande a motifs resistifs |
JP7023961B2 (ja) * | 2016-08-29 | 2022-02-22 | アラリス ホールディングス リミテッド | 多帯域円偏波アンテナ |
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2018
- 2018-05-04 FR FR1800429A patent/FR3080959B1/fr active Active
-
2019
- 2019-05-03 IL IL278362A patent/IL278362B2/en unknown
- 2019-05-03 EP EP19720680.8A patent/EP3788674A1/fr active Pending
- 2019-05-03 WO PCT/EP2019/061399 patent/WO2019211446A1/fr active Application Filing
- 2019-05-03 US US17/050,970 patent/US11495887B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
IL278362B2 (en) | 2024-08-01 |
IL278362B1 (en) | 2024-04-01 |
US20210126374A1 (en) | 2021-04-29 |
WO2019211446A1 (fr) | 2019-11-07 |
US11495887B2 (en) | 2022-11-08 |
FR3080959A1 (fr) | 2019-11-08 |
FR3080959B1 (fr) | 2021-06-25 |
IL278362A (fr) | 2020-12-31 |
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