EP3903381A1 - Procede d'integration d'une antenne " reseaux " dans un milieu de nature electromagnetique differente et antenne associee - Google Patents
Procede d'integration d'une antenne " reseaux " dans un milieu de nature electromagnetique differente et antenne associeeInfo
- Publication number
- EP3903381A1 EP3903381A1 EP19832904.7A EP19832904A EP3903381A1 EP 3903381 A1 EP3903381 A1 EP 3903381A1 EP 19832904 A EP19832904 A EP 19832904A EP 3903381 A1 EP3903381 A1 EP 3903381A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- parameter
- radiating elements
- reflectivity
- antenna
- radiating
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/40—Radiating elements coated with or embedded in protective material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/141—Apparatus or processes specially adapted for manufacturing reflecting surfaces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/528—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the re-radiation of a support structure
-
- 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
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
- H01Q15/0046—Theoretical analysis and design methods of such selective devices
-
- 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
- H01Q19/02—Details
- H01Q19/021—Means for reducing undesirable effects
-
- 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
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
-
- 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
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
Definitions
- the field of the invention is that of electromagnetic antennas called "network antennas" used in all types of radiocommunications. These antennas can, in particular, be radars. These antennas can be installed on the ground or on any type of mobile carrier, such as aircraft.
- the antennas in general, are integrated into a medium. This can range from a simple pylon for the cellular telecommunications base station to a mobile carrier, such as an aircraft.
- the environment surrounding the antenna must be taken into account when designing the antenna so as not to disturb the radio performance of the antenna.
- FIG. 1 represents in lateral view the reflection of an incident wave I at this discontinuity B.
- the incident wave I then generates a specular wave S but also a parasitic retroreflected wave SER linked to the discontinuity B.
- Array type electromagnetic antennas are made up of a finite set of radiating elements. Depending on the applications, the constitution of a radiating element varies. In some cases, it can be made entirely of metal. In other cases, it can be made of metal resting on a substrate and surrounded by a superstrate. Superstrate means any structure which covers the antenna. A radome is a superstrate. This structure can be adapted to change the radiation characteristics of the antenna.
- network antennas can generate surface waves.
- the surface waves generated by the antenna are diffracted at the edge by the edges. These waves can be reflected on the edges of the antenna cavity and be diffracted on the other edge of the cavity.
- We then observe a phenomenon of multiple reflection of surface waves on the edges of the antenna cavity which results in an increase in the RES and a deterioration in the performance of the emitted radiation. This phenomenon also contributes to a degradation of the antenna performance.
- the integration of a network antenna encounters the same type of problem as an antenna.
- the edges of the edge of the panel create diffraction phenomena which mainly disturb the radiating elements located on the edge of the panel and participate in the antenna SER.
- a first solution consists in adding, in the environment close to the antenna, materials absorbing electromagnetic waves; this solution is exposed in the publication of E. F. Knott, J. F. Schaeffer, and M. T. Tuley, Radar Cross Section, 2nd edition. Scitech Publishing, 2004.
- This method helps to reduce cavity reflections and especially cavity edge reflections due to the presence of surface waves. Furthermore, these waves create multiple reflections. The presence of absorbents eliminates this phenomenon of reflection of surface waves at the edges of the antenna.
- absorbent materials Solutions based on absorbent materials are generally not sufficient. Absorbents often continue to create an abrupt discontinuity between the medium and the antenna. Furthermore, the absorbent materials can be different in nature than the antenna and do not necessarily operate under the same conditions of temperature, pressure or vibrational environment as those of the antenna.
- the method according to the invention does not have the above drawbacks. It optimizes the transition between the antenna and its environment by focusing on the electromagnetic behavior of the discontinuity and aims thus reducing the effects of diffraction and surface waves resulting from this transition.
- the subject of the invention is a method of integrating a network antenna in a medium, said antenna comprising a plurality of radiating elements ensuring the transition between the antenna and the medium, the reflectivity of each radiating element dependent at least one parameter, the reflectivity being represented by a complex number, the reflectivity of a first element being equal to or close to that of the antenna, the reflectivity of a last radiating element being equal to or close to that of the medium , the reflectivity parameter of the radiating elements comprised between this first radiating element and this last radiating element varying from one radiating element to the next, characterized in that the method comprises the following steps:
- Step 1 Calculation of a path represented in the complex plane and equal to the sum of the variations in the reflectivity of a radiating element to the following radiating element;
- Step 2 Optimization of the variation of the reflectivity parameter so that the radar equivalent surface of the antenna is as small as possible or that at least one of the characteristics of the antenna radiation is reached;
- Step 3 Determination of the different radiating elements as a function of said parameter
- Step 4 Simulation of the overall reflectivity and / or the radiation of the antenna.
- the speed of variation of the parameter is minimum between the first element and the next element, minimum between the last element and the preceding element and maximum between the two elements furthest from the first element and the last element.
- the reflectivity coefficient is a complex number comprising a real part and an imaginary part and in that the variation of the reflectivity between two radiating elements is equal to the modulus of the variations of the real and imaginary parts of the reflectivity of said radiating elements.
- the invention also relates to a network antenna intended to be integrated into a medium and produced according to the preceding method, said antenna comprising a plurality of radiating elements ensuring the transition between the antenna and the medium, the reflectivity of each radiating element depending on '' at least one parameter, the reflectivity being represented by a complex number, the reflectivity of a first element being equal to or close to that of the antenna, the reflectivity of a last radiating element being equal to or close to that of the medium, characterized in that the parameter of reflectivity of the radiating elements included between this first radiating element and this last radiating element varies from one radiating element to the next, the speed of variation of the parameter being minimum between the first element and the following element, minimum between the last element and the preceding element and maximum between the two elements furthest from the first element and the last element
- the parameter is the pitch of the network in one direction of space or two directions of space.
- the radiating elements being metallic
- the parameter is a geometric parameter of the radiating elements so that the radiating elements have different metallic surfaces.
- the parameter is a geometric parameter of the radiating elements so that the radiating elements have different resistive surfaces.
- the parameter is a physical characteristic of a substrate constituting the radiating elements.
- the parameter is a physical characteristic of a superstrate constituting the radiating elements.
- the physical characteristic is the relative permittivity or the permeability of said substrate or of said superstrate.
- the radiating elements comprising a plurality of sheets of metallic or resistive patterns
- the parameter is the quantity or the arrangement of said sheets present in the radiating elements.
- the radiating elements comprising metamaterials
- the parameter is the quantity of metamaterials present in the radiating elements.
- Figure 1 shows, in top view, a rectangular antenna according to the prior art integrated into a medium
- Figure 2 shows, in side view, the previous antenna according to the prior art
- FIG. 3 represents the RES generated at the interface between an antenna according to the prior art and a medium
- Figure 4 shows, in top view, a rectangular antenna according to the invention integrated in a medium
- Figure 5 shows, in side view, the previous antenna according to the invention
- FIG. 6 represents the RES generated at the interface between an antenna according to the invention and a medium
- FIG. 7 represents the variation of the complex reflectivity coefficient between two radiating elements according to the invention.
- FIG. 8 represents the variation of the path representative of the variations in reflectivity as a function of successive radiating elements
- FIG. 9 represents the speed of variation of the reflectivity as a function of successive radiating elements
- FIG. 10 represents the variation of the reflectivity coefficient as a function of the variation of the dependence parameter
- FIG. 11 represents the variation of the dependence parameter as a function of the succession of the radiating elements
- FIG. 12 represents a top view of part of an array of radiating elements according to the prior art
- FIG. 13 represents the variation of the coefficient of complex reflectivity between two radiating elements in the previous embodiment
- FIG. 14 represents a top view of a part of an array of radiating elements in an embodiment according to the invention.
- FIG. 15 represents the variation of the path representative of the variations in reflectivity as a function of the successive radiating elements of FIG. 14;
- FIG. 16 represents the variation of the path representative of the variations in reflectivity of FIG. 15 as a function of the dependence parameter
- FIG. 17 represents the value of the dependence parameter of FIG. 16 as a function of the radiating element.
- FIGS. 4 to 6 represent an antenna A according to the invention integrated into its environment M.
- FIGS. 4 and 5 represent a top view and a side view of a rectangular antenna A of width L x and of length L y integrated in an environment M of different electromagnetic nature.
- the reflectivity r a of the antenna is different from the reflectivity r m of the medium.
- This antenna is surrounded by a transition zone T of width L Tx and of length L Ty .
- This transition zone is made up of radiating elements. The electromagnetic parameters of these elements vary so as to modify their reflectivity coefficient Ty, thus ensuring a smooth transition between the antenna and its medium.
- FIG. 6 represents, in lateral view, the reflection of an incident wave I at the level of the transition zone T.
- the incident waves then generate specular waves S but also retroreflected waves SER of much smaller magnitudes than in l absence of transition zone.
- the electromagnetic behaviors of the antenna and the medium are characterized by an impedance or a surface reflectivity. There is a passing relationship between these two parameters. We can thus model the antenna and its environment by two different impedance plates.
- the reflectivity is calculated and represented in the complex plane. It depends on the frequency, the incidence and the polarization of the wave.
- the discontinuity caused by the change in impedance modifies the radioelectric behavior of the antenna and induces harmful diffraction phenomena.
- the integration of a gradual and controlled transition of reflectivity in one or more directions in space makes it possible to eliminate the effects of this discontinuity.
- the radar equivalent surface can be reduced in significant proportions.
- One of the characteristics of the antenna radiation can also be optimized. These include, for example, the overall effectiveness of the radiation, but also the shape and distribution of the emission side lobes or the gain of the antenna.
- the progressive variation of the reflectivity from one radiating element to the other can be done on one or more physical parameters of the radiating element which can be:
- the pitch of the network in one or both directions of the network -
- a physical property of the materials making up the radiating element such as, for example, the relative permittivity of the substrate that composes it.
- the reflectivity along the transition can be continuous or discretized.
- a continuous modification means that the intrinsic property varies within all of the radiating elements of the transition.
- a discretization of the transition comes down to giving a specific value to each element of the transition.
- the method according to the invention makes it possible to reduce the diffraction effects for an incidence, a polarization and a determined frequency. Although optimization is carried out for this incidence, this polarization and this determined frequency, it also acts for different incidences, frequencies and polarizations, sometimes according to the same law. Thus, the method is implemented for a typical or average value of the incidence, of the polarization and of the frequency and is applied to a wider range of incidence, of polarization and of frequency.
- the reflectivity does not necessarily vary according to these three parameters.
- the reflectivity of a metallic plane is equal to -1 whatever the frequency, the polarization and the incidence of the wave.
- n the number of radiating elements
- i the sequence number of a radiating element, i varying from 0 to n.
- the reflectivity of this first element is equal to or close to that of the antenna
- the reflectivity of the last radiating element is equal to or close to that of the medium.
- the reflectivity parameter (s) of the radiating elements included between this first radiating element and this last radiating element vary from one radiating element to the next.
- each radiating element has the reflectivity l (s).
- the start point of the path is defined as the reflectivity of the antenna and the end point that of the middle. Defining the reverse also works.
- the definition of this path gives the variation of the parameterized curve l (s).
- the curve in Figure 7 gives the complex representation of the accessible path as a function of a single physical parameter.
- the real part x is on the x-axis and the imaginary part y on the y-axis. They are between -1 and + 1.
- the parameterized curve T (s) is discretized according to a certain number of elements n of the transition, this discretization can be uniform or non-uniform.
- a uniform discretization corresponds to the same spacing between each element.
- the point noted G (0) corresponds to the reflectivity of the antenna and the point noted G (h) corresponds to the reflectivity of the medium for the nth radiating element. In the case of FIG. 7, this reflectivity is equal to -1.
- the length of the parameterized path L rn is equal to:
- s 0 is the initial value of the physical parameter or of the set of parameters when several are taken into account. It corresponds to the value of the parameter of the first radiating element, closest to the antenna.
- s n is the final value of the physical parameter or of the set of parameters when several are taken into account. It corresponds to the value of the parameter of the last radiating element, closest to the middle.
- v (s) is the vector derived from l (s). Its coordinates in the complex plane are
- the masking of diffraction phenomena is optimized. It is necessary that the parametric speed norm noted
- FIG. 8 presents an example of a mathematical law describing the evolution of the parameterized length L r as a function of the position of the radiating element i.
- the number of radiating elements is 12 in FIGS. 8 and 9.
- the curve in FIG. 8 shows slight variations at the start and at the end so as to obtain low parametric speeds at the ends.
- the parametric speed norm is shown discreetly in Figure 9. It is also expressed as a function of the radiating element i.
- the next step of the process consists in going back to the values of the parameter or to the set of parameters associated with each value of length of the parameterized curve.
- This determination can be made in different ways: analytically, if there is a formula of passage, using abacus or tabulated values.
- Figures 10 and 11 represent this step of determining the physical dimensions associated with each element of the transition.
- FIG. 10 represents the variation of the length of the path L rn as a function of the maximum value of the parameter s. This figure is represented in a semi-logarithmic coordinate system, the parameter s varying according to a logarithmic law. For a given maximum parameter value, the value of the corresponding path is therefore deduced therefrom.
- FIG. 11 represents, for a determined maximum parameter value, the value of this parameter for each radiating element.
- the maximum variation of s is 2000 for the first element, 500 for the second, 200 for the third and so on for the following elements.
- the reflectivity of all the elements of the transition in the complex plane can be represented to verify the correct distribution of the points on the accessible path determined initially.
- the method is implemented in the case of the integration of a network antenna consisting of openings of waveguides in a metallic medium.
- Figure 12 shows a top view of the antenna A at its separation from the medium M.
- the openings of the radiating elements ER are all identical, square in shape and side a. They are regularly arranged.
- FIG. 13 shows the variation of the reflectivity coefficient between the antenna and its medium in the complex plane.
- G (0) corresponds to the reflectivity of the antenna
- G (h) corresponds to the reflectivity of the medium for the nth radiating element. In the case of FIG. 13, this reflectivity is equal to -1.
- the method according to the invention consists in determining a transition zone separating the antenna from its medium so that the problems of parasitic reflectivity are very attenuated.
- the radiating elements of this transition zone are of the same nature as those of the antenna but of smaller dimensions.
- the parameter used to vary the reflectivity of the radiating elements is therefore this dimension.
- Figure 14 shows a top view of the antenna at its separation from the medium with the radiating elements ER T of the transition zone.
- the dimension ai of the first element of the transition zone is therefore less than 0
- last element of the antenna the dimension a 2 of the second element of the transition zone is therefore less than 0 and so on for the elements following.
- FIG. 15 represents the variation of the path representative of the variations in reflectivity as a function of the successive radiating elements of FIG. 14.
- FIG. 16 represents the variation of the path representative of the variations in reflectivity as a function of the dependence parameter.
- the parameter a varies between 0 and 7 millimeters.
- FIG. 17 represents the value of the dependence parameter as a function of the radiating element.
- the simulations of the electromagnetic signature levels with or without said transition zone as defined above show a gain of approximately 30 dB over several octaves of frequency, whatever the polarization of the wave. This gain is all the more important as the incidence approaches the grazing incidence.
- the method according to the invention makes it possible to obtain substantial attenuations of the parasitic effects at the cost of an increase in reduced complexity.
- the radiating elements of the transition zone are, in fact, of the same nature as those of the antenna and poses no problem of implementation.
- variable parameter is the size of the radiating elements.
- ways to modify the reflectivity parameter are, however, a large number of ways to modify the reflectivity parameter.
- the parameter can be a geometric parameter of the radiating elements so that the radiating elements have different metallic surfaces.
- the parameter can be a geometric parameter of the radiating elements so that the radiating elements have different resistive surfaces.
- the parameter can be a physical characteristic of a substrate or of a superstrate constituting the radiating elements. This physical characteristic can be the relative permittivity or the permeability of said substrate or of said superstrate.
- the radiating elements may comprise a plurality of sheets of metallic or resistive patterns, the parameter being the quantity or the arrangement of said sheets present in the radiating elements.
- the radiating elements can comprise metamaterials, the parameter being the quantity of metamaterials present in the radiating elements.
- metamaterial designates an artificial composite material which has electromagnetic properties different from those of natural materials. These metamaterials are composed of periodic, dielectric or metallic structures depending on the desired properties.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Bioinformatics & Computational Biology (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1874283A FR3091419B1 (fr) | 2018-12-28 | 2018-12-28 | Procédé d’intégration d’une antenne « réseaux » dans un milieu de nature électromagnétique différente et antenne associée |
| PCT/EP2019/086043 WO2020136059A1 (fr) | 2018-12-28 | 2019-12-18 | Procede d'integration d'une antenne " reseaux " dans un milieu de nature electromagnetique differente et antenne associee |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3903381A1 true EP3903381A1 (fr) | 2021-11-03 |
| EP3903381B1 EP3903381B1 (fr) | 2024-02-07 |
Family
ID=67001924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19832904.7A Active EP3903381B1 (fr) | 2018-12-28 | 2019-12-18 | Procede d'integration d'une antenne " reseaux " dans un milieu de nature electromagnetique differente et antenne associee |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11646500B2 (fr) |
| EP (1) | EP3903381B1 (fr) |
| ES (1) | ES2975370T3 (fr) |
| FR (1) | FR3091419B1 (fr) |
| WO (1) | WO2020136059A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3091419B1 (fr) | 2018-12-28 | 2023-03-31 | Thales Sa | Procédé d’intégration d’une antenne « réseaux » dans un milieu de nature électromagnétique différente et antenne associée |
| US12119546B2 (en) * | 2021-06-24 | 2024-10-15 | Airbus Defence And Space Sas | Satellite platform having improved characteristics in respect of electromagnetic decoupling between radiating elements and corresponding construction process |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4684952A (en) * | 1982-09-24 | 1987-08-04 | Ball Corporation | Microstrip reflectarray for satellite communication and radar cross-section enhancement or reduction |
| US6961368B2 (en) * | 2001-01-26 | 2005-11-01 | Ericsson Inc. | Adaptive antenna optimization network |
| US6414644B1 (en) * | 2001-09-18 | 2002-07-02 | The Boeing Company | Channeled surface fairing for use with a phased array antenna on an aircraft |
| JP2004077399A (ja) * | 2002-08-22 | 2004-03-11 | Hitachi Ltd | ミリ波レーダ |
| WO2006091162A1 (fr) | 2005-02-28 | 2006-08-31 | Telefonaktiebolaget Lm Ericsson (Publ) | Procede et systeme de reduction de la section efficace en radar d'antennes integrees |
| CN100383963C (zh) | 2005-07-08 | 2008-04-23 | 富准精密工业(深圳)有限公司 | 薄型环路式散热装置 |
| EP1928056A1 (fr) * | 2006-11-28 | 2008-06-04 | Saab AB | Procédé de conception d'antennes réseau |
| ATE480020T1 (de) * | 2007-03-02 | 2010-09-15 | Saab Ab | Rumpfintegrierte antenne |
| EP1983608B1 (fr) * | 2007-04-20 | 2013-02-27 | Saab AB | Antenne incorporée sur aéronef |
| FR2936906B1 (fr) * | 2008-10-07 | 2011-11-25 | Thales Sa | Reseau reflecteur a arrangement optimise et antenne comportant un tel reseau reflecteur |
| KR100976858B1 (ko) * | 2008-10-24 | 2010-08-20 | 한국과학기술원 | 저 레이더 반사면적의 평면 패치 안테나와 평면 패치어레이 안테나 |
| CN105811118B (zh) * | 2016-03-16 | 2019-08-20 | 深圳光启高等理工研究院 | 一种天线 |
| DE102018215393A1 (de) * | 2018-09-11 | 2020-03-12 | Conti Temic Microelectronic Gmbh | Radarsystem mit einer Kunststoffantenne mit reduzierter Empfindlichkeit auf Störwellen auf der Antenne sowie auf Reflektionen von einer Sensorabdeckung |
| FR3091419B1 (fr) | 2018-12-28 | 2023-03-31 | Thales Sa | Procédé d’intégration d’une antenne « réseaux » dans un milieu de nature électromagnétique différente et antenne associée |
-
2018
- 2018-12-28 FR FR1874283A patent/FR3091419B1/fr active Active
-
2019
- 2019-12-18 US US17/418,237 patent/US11646500B2/en active Active
- 2019-12-18 ES ES19832904T patent/ES2975370T3/es active Active
- 2019-12-18 EP EP19832904.7A patent/EP3903381B1/fr active Active
- 2019-12-18 WO PCT/EP2019/086043 patent/WO2020136059A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020136059A1 (fr) | 2020-07-02 |
| US11646500B2 (en) | 2023-05-09 |
| FR3091419B1 (fr) | 2023-03-31 |
| ES2975370T3 (es) | 2024-07-04 |
| EP3903381B1 (fr) | 2024-02-07 |
| FR3091419A1 (fr) | 2020-07-03 |
| US20220085515A1 (en) | 2022-03-17 |
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