EP3371852A1 - Antenne compacte à faisceau orientable - Google Patents
Antenne compacte à faisceau orientableInfo
- Publication number
- EP3371852A1 EP3371852A1 EP16790405.1A EP16790405A EP3371852A1 EP 3371852 A1 EP3371852 A1 EP 3371852A1 EP 16790405 A EP16790405 A EP 16790405A EP 3371852 A1 EP3371852 A1 EP 3371852A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- microstructures
- holographic
- antenna according
- diffractive
- 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
Classifications
-
- 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
- H01Q19/067—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 using a hologram
-
- 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
- H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
- H01Q15/08—Refracting or diffracting devices, e.g. lens, prism formed of solid dielectric material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/12—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems
- H01Q3/14—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying the relative position of primary active element and a refracting or diffracting device
Definitions
- the field of the invention is that of steerable beam antennas.
- the invention applies to the treatment of a microwave beam, corresponding to frequencies between 300 MHz and 300 GHz, typical wavelength of 1 mm to 1 m. Such frequencies are used in particular in the field:
- the antenna For pointing the antenna must be configured to transmit
- the antenna For “tracking” or tracking, the antenna must be configured to follow a target such as a satellite.
- the beam For scanning, the beam must illuminate a defined part of the space or scene for analysis.
- the Cassegrain dish antenna is handicapped by shading effects due to the position of the source (more specifically by the secondary reflector) in front of the reflector. Also to maintain good efficiency, a large diameter-to-wavelength ratio is required. At low frequency, this antenna can not be integrated in a small volume.
- One solution to realize an RF deflection system is to use two diffractive components that can rotate about the same axis, combined with a lens and an RF source.
- These diffractive components and the lens each have a plurality of periodic sub-wavelength MS microstructures formed in a dielectric material in a Risley scan configuration.
- the structure of the diffractive component C1 may be fabricated on one side of the component, the structure of the lens L being formed on its other face.
- the Pointing of the beam emitted by the source is ensured by independent rotations around the same axis of the L + C1 diffractive diffractive lens-lens component and the diffractive component C2.
- the advantage of such a deflection system is to be compact with a fixed power source S and mechanical capabilities of orientation while ensuring high efficiency.
- the thickness of the diffractive component is about 30 mm.
- the total thickness of the deflection system is therefore about 100 mm.
- the total thickness of the agile antenna is about 300 mm. But this thickness can still be too important for some applications embedded on mobile platforms.
- phase-shifting surface PSS
- the authors use a phase corrected Fresnel plate corrected by a PSS phase shift for generating a beam out of axis, and a plate with a single linear progression of phase.
- a phase shifted surface as described in the N. Gagnon and A.
- Petosa publication “Thin Microwave Quasi-Transparent Phase-Shifting Surface”, 2010, is a thin self-supporting structure that introduces a phase shift in an electromagnetic wave. propagating through this surface.
- figures 2 the configuration of a portion of PSS with three metallization layers, made of conductive square elementary pieces, with:
- FIG. 2a is a sectional view (in a plane yz) showing the three conductive layers 1, 3, 5 of total thickness h, separated by two dielectric layers 2, 4, of permittivity ⁇ ⁇ , the sides of the conductive parts being a1 for the outer layers 1 and 5 and a2 for the inner layer 3, and
- 2b a top view (in a xy plane) showing square cells (s side) of the first conductive layer 1 with each for a square conductive part of side a1 placed on a dielectric layer 2.
- phase shift between the incident wave and the transmitted wave, and the transmission are controlled by adjusting the geometric parameters a1 and a2. This makes it possible to obtain a resonance in the structure and therefore a maximum transmission for a desired phase shift.
- the best parameters make it possible to obtain phase shifts between 0 and 360 °. This solution nevertheless has drawbacks:
- this configuration restricts the use of the concept at frequencies below about 30 GHz because the metal and dielectric losses greatly increase beyond these frequencies.
- this type of cell can have very different transmission coefficients (in phase and in amplitude) for the components of the sagittally polarized light (polarization s). or TE) or in the perpendicular plane (polarization p or TM) by ratio to the phase shift surface.
- polarization s sagittally polarized light
- polarization p perpendicular plane
- the approach according to the invention is based on the use of one or two dielectric components with microstructures arranged in an arrangement determined by a holographic calculation.
- the subject of the invention is a microwave beam antenna having a wavelength of between 1 mm and 1 m which comprises:
- a first dielectric subwavelength microstructure component formed on one side of a dielectric substrate, a second subwavelength microstructure diffractive dielectric component formed on one side of a dielectric substrate, configured to deflect a dielectric substrate; incident microwave beam.
- the microstructures of the first dielectric component are implanted in a non-periodic arrangement to form a non-resonant, dual-function holographic component which is configured to collimate in transmission and / or focusing mode. receiving mode and for deflecting an incident microwave beam, in that this non-resonant holographic component is associated with a first rotation mechanism about a first axis of rotation, and in that the second diffractive dielectric component is associated with a second mechanism rotation about a second axis of rotation.
- This antenna configuration provides good compactness, low weight and good efficiency.
- the antenna according to the invention operates in transmission, which makes it possible to obtain a good efficiency and a low level of secondary lobes despite a small antenna diameter.
- the antenna according to the invention is without moving parts active RF radiation: all the electronics can be integrated closer to the source for simpler integration, more efficient and less expensive.
- the profile of the antenna according to the invention remains flat regardless of the direction of orientation, which provides a decisive advantage when integrating into the fairing.
- the antenna according to the invention which is based on dielectric components, does not require metal implantation; it does not generate metal losses.
- this non-resonant configuration allows wider band operation. For example, a bandwidth (defined as 1 dB of the maximum gain) was measured with such an antenna at a value as high as 18%, which is 240% larger than with a PSS lens structure.
- the microstructures of the first and / or second component are formed on a 3D surface; when the microstructures of the second diffractive component are formed on a 3D surface, they are implemented in a non-periodic arrangement.
- the microstructures of the holographic component are formed in a volume which is based on said face of the holographic component, and implanted according to a non-periodic three-dimensional arrangement. The same applies to the microstructures of the second component.
- the beam at the output of the holographic component in emission mode or at the input of the holographic component in reception mode may be a plane wave with an angle of incidence corresponding to the orientation angle.
- the first rotation mechanism is optionally associated with a first translation mechanism of the holographic component in a plane perpendicular to the first axis of rotation.
- the antenna comprises transmission and / or reception means which can be associated with a translation mechanism (designated second translation mechanism) in a plane perpendicular to the axis of rotation of the first rotation mechanism.
- microstructures of the holographic component and / or the second diffractive component are advantageously implanted from a mesh delimited by iso-phase lines and phase gradient lines.
- the mesh used for the microstructures of the holographic component may be different from the mesh used for the microstructures of the second diffractive component.
- the microstructures optionally consist of primary microstructures and secondary microstructures making it possible to produce an impedance matching layer (antireflection layer) for the weak and the high pointing angles and thus making it possible not to depolarize the wave passing through the component.
- the steerable beam antenna preferably comprises a fairing in an absorbent microwave material, possibly with subwavelength microstructures disposed within the shroud.
- the invention also relates to a method of manufacturing a steerable beam antenna, as described, which comprises the following steps:
- FIG. 1 is a diagrammatic sectional view of an exemplary RF deflection system according to the state of the art, based on a double component with periodic microstructures with a lens on one side and a first diffractive grating on the other side, and a second periodic diffractive grating,
- FIGS. 2 already described schematically show a sectional view (FIG. 2a) and a plan view (FIG. 2b) of a metal plate portion with 3 metallization layers, of an example of a PSS type antenna,
- FIG. 3 are diagrammatic views in section of the non-periodic dielectric components of an example antenna according to the invention, with a single layer of microstructures (FIG. 3a) and a detail of microstructures with primary microstructures and secondary microstructures (FIG. 3b). ,
- FIG. 4 represents the phase of an example of a diffractive lens outside the holographic axis according to the invention
- FIG. 6a is a diagrammatic view from above of a first example of implementation of subwavelength microstructures with constant section over their height according to a square Cartesian mesh detailed on a larger scale FIG. 6b, and viewed in perspective (FIG. 6c). ,
- FIG. 7a schematically shows from above another example of implementation of subwavelength microstructures according to a mesh with iso-phase lines and phase gradient lines, detailed on a larger scale FIG. 7b,
- FIG. 8 illustrates in perspective an example of a mechanism for rotating the second holographic component and a mechanism for rotating and translating the first holographic component, with a receiver and a fixed source
- FIGS. 10 illustrate the increase of the visible surface of an antenna for grazing incidences, between a plane holographic component antenna (2D surface) (FIG. 10a), and a 3D holographic component antenna (FIG. 10b). , views in section, and apparent surface curves Sa expressed in dBm 2 as a function of the angle of view for different spherical surfaces of diameter D and height H and apparent surface of 1 m 2 at zero angle of view (FIG. )
- FIG. 11a schematically illustrates the generation of parasitic rays
- FIG. 11b is a diagrammatic sectional view of an example of an internal structure of the microstructure fairing in the form of straight pillars
- FIG. 11 shows another example of an internal structure of the shroud with microstructures in the form of straight and inclined pyramids.
- the antenna according to the invention comprises two dielectric components: a diffractive grating and a dual-function lens and diffractive grating component, these two dielectric components being able to rotate each about an axis of rotation.
- the antenna comprises a single non-resonant dielectric component and on one and the same face thereof, the lens and the first diffractive grating thus combining on this same face the collimation functions of the lens and deflection of the diffractive grating (in transmission mode, and deflection functions of the diffractive grating and focussing of the lens in reception mode).
- This makes it possible to reduce the number of components by changing from three dielectric components (the lens, the first and the second diffractive grating) to two dielectric components (an off-axis diffractive lens and the second diffractive grating) and thus to reduce the complexity and weight of the antenna including decreasing the number of rotation mechanisms associated with these components.
- this dual function component designated off-axis diffractive lens or first holographic component CH, comprises subwavelength MS microstructures shown in FIG. 3a, formed on a single face thereof, and implanted according to a non-periodic arrangement determined by an interference calculation on said face, between the beam incident on this face and the desired output beam.
- the description is made considering the transmission mode of the antenna, the incident beam then being the beam emitted by the source; but of course the receiving mode exists just as well, the output beam then being directed towards the receiving means.
- the phase of an example of a first holographic component thus calculated is shown in FIG.
- microstructures are qualified as sublength of wave when the following condition for the cells (or meshes) where they are implanted, is fulfilled:
- ⁇ 0 / ⁇ with ⁇ 0 the target wavelength chosen in the wavelength range corresponding to the microwave waves, namely a wavelength typically between 1 mm and 1 m, and n the refractive index of the dielectric material in which the microstructures are formed.
- this first holographic component is flat-faced (2D surface) as shown in Figures 3, 8 and 10a
- it is a calculation of interference on this plane face between the incident beam emitted by the source and the output beam which, in the case of a steerable beam antenna, is a plane wave with an angle of incidence (emission angle of exit in emission mode / angle of incidence in reception mode) corresponding to the angle of beam orientation.
- the height and size of each CH microstructure are determined experimentally or calculated to match the modulo 2 ⁇ phase delay introduced locally by each microstructure, to the conjugate of the hologram phase at that same point.
- FIG. 5 shows an example of amplitude (FIG. 5a) and phase (FIG. 5b) of the output beam of a first circular 150 mm diameter holographic component operating at 42 GHz and placed 75 mm from the source. ; a deflection of 29 ° is obtained as shown in Figures 5c and 5d with the angle ⁇ .
- the implementation of the subwavelength microstructures on one side of the second diffractive grating C2 can also be determined by a calculation of interferences on this face between the beam transmitted by the off-axis diffractive lens. (first holographic component CH) and the desired output beam, but not necessarily. Indeed the microstructures of C2 can be determined as described in patent FR 3 002 697. When the implementation of the microstructures is determined by the calculation of interference, this second component is designated second holographic component; this calculation is applicable independently of the interference calculation applied to the first holographic component.
- the subwavelength implementation of the microstructures of one and / or the other dielectric component is carried out from a geometric mesh M generally based on Cartesian, that is to say based on rectangular or square, as shown in the examples of Figures 6a, 6b and 6c.
- a hexagonal or even circular mesh can also be envisaged.
- the meshes of the first (CH) and the second component (C2) may be identical but not necessarily.
- the base of a microstructure can not of course exceed one mesh (or cell) of the mesh, but may occupy it only partially.
- some meshes are empty, others are entirely occupied by the base of the microstructure and for others finally, the base of the microstructure occupies only partially the corresponding mesh. , depending on the implementation determined.
- filling ratio is meant the ratio of the surface of the microstructure at its base to the surface of the cell.
- a mesh base in a coordinate system adapted to adjust the phase at best a subwavelength geometrical structure is produced from a mesh M which coincides with iso-phase lines in one direction and with lines with a phase gradient in directions respectively perpendicular to the insulated lines. phases, as illustrated in FIGS. 7a, 7b.
- the tracking and the beam orientation capabilities are obtained by means of rotating the diffractive lens out of the CH axis and the C2 diffractive component relative to each other.
- a common rotation of the two components allows an azimuth orientation while a counter-rotation of one with respect to the other allows an elevation orientation.
- the zenith then constitutes a singular point which can be pointed out only if the angles of deflection of the two components are equal.
- azimuthal tracking this imposes very strong accelerations on the two components, which is very difficult to achieve. In other words, azimuthal tracking can only be performed at almost zero speed.
- the rotation mechanism of CH is associated with a translation mechanism along 2 axes, as shown In this figure is the rotation mechanism (symbolized by a dotted circular arrow) of the first holographic component CH which is completed by a translation mechanism with 2 axes in a plane perpendicular to the first axis of rotation; the second component C2 is equipped only with a rotation mechanism (symbolized by a circular arrow solid line).
- This makes it possible to keep the receiver R and the source S of the antenna stationary, while at the same time allowing the beam to be oriented along 2 additional axes without any singular point, and a tracking ability near the zenith.
- the first and second axes of rotation are no longer superimposed.
- the orientation mechanisms of the component CH and the component C2 can be independent.
- the source or more generally the transmission and / or reception means can themselves be associated with a translation mechanism (designated second translation mechanism) in a plane perpendicular to the axis of rotation of the first rotation mechanism.
- This orientation capability was calculated for a first circular 150 mm diameter holographic component positioned 75 mm above a 42 GHz source horn, designed to orient the beam at an angle of 28.5 °.
- a translation of this component between -10 and 10 mm induces an additional deflection of between -7.75 ° and + 8.5 ° with a gain reduction of -1 dB in the worst case. case.
- the microstructures of the first and / or second component may be formed on a non-planar surface, i.e. on a surface 3D predetermined for each of the two components, such as a surface with symmetry of revolution such as a cone, a sphere or any arbitrary 3D surface.
- a surface 3D predetermined for each of the two components such as a surface with symmetry of revolution such as a cone, a sphere or any arbitrary 3D surface.
- the choice of the 3D surface is done for example according to the compromise performance zenith / angles grazing sought, or depending on a desired size.
- a 3D surface makes it possible to increase the apparent surface Sa of the antenna and thus the gain for grazing impacts as illustrated in FIG.
- the implementation of the sub-wavelength microstructures of the second component C2 is necessarily determined by the interference calculation indicated above; says otherwise the second component is necessarily a holographic component.
- the microstructures are all formed in a dielectric material according to predetermined shapes, either protruding in the form of pillars, or hollow in the form of holes. A combination of holes and pillars is also possible.
- the microstructures are of any shape, preferably with axes of symmetry to make them independent of the polarization of the incident beam at normal incidence, which allows a behavior of the deflection system according to the invention which is not very sensitive to polarization.
- the microstructures have a square, hexagonal or circular cross section, or a combination of different geometries, or a section conforming to iso-phase lines and phase gradient lines. They can be of constant section on their height or variable as in the case of a pyramidal structure, conical, etc.
- the height of the microstructures MS is generally identical within the same component (as illustrated in FIG. 3a), but not necessarily; it can also be identical from one component to another but not necessarily. They may be perpendicular to the surface of the component or inclined, for example at 30 °.
- One can also have a variable inclination on the same component. The inclination is determined experimentally, typically as a function of the direction of inflection or incidence of the beam.
- the first holographic component CH comprises superpositions of microstructure layers MS subwavelength, formed in the volume of that and implanted according to a non-periodic three-dimensional arrangement determined by a calculation of interference on said volume, between the beam emitted by the incident source in this volume and the desired output beam.
- This volume is of course based on the face of the CH component on which the microstructures are formed; this volume is defined in particular by this face.
- the computation of the volume interference can be carried out experimentally by successive adjustments or by calculation, for example by transforming the volume of CH into a stack of K 2D or 3D surfaces parallel to each other (with K an integer typically between 2 and 100) on each of which a surface interference pattern is calculated.
- the stack of layers of microstructures is obtained for example by matching for each calculation point of the volume, a microstructure of height reduced by a factor K and whose section makes it possible to generate a local phase delay corresponding to the conjugate of the phase of the hologram at the same point reduced by a factor K.
- Another way to obtain the distribution of 3D microstructures consists of calculating interference obtained on the face of the component CH between the incident beam emitted by the source and the output beam, to project the section of each of the microstructures into the volume. of the component following the curves resulting from the intersection between the isophase planes of the volume hologram and the planes containing the phase gradients.
- the height and section of each CH microstructure are calculated to match the phase retardation (modulo 2pi) introduced by each microstructure to the conjugate of the hologram phase calculated at the surface of CH.
- this calculation of interference on said volume can be done: - discretely for different values of z (size of the stack); it is a sort of reiteration for several implementation surfaces considered at different z-values, the 2D interference calculation previously described for a single implementation surface. The height and the section of the microstructures is then to be determined on each of these surfaces as indicated previously, or
- the microstructures of the component CH and / or C2 consist of primary microstructures MSp, and secondary microstructures MSs arranged in a second layer on the first layer of the primary microstructures, as can be seen in FIG. 3b.
- Their arrangement on the primary microstructures and their shape are determined by known means (parametric optimization algorithms) to maximize and equalize the transmissions of the structure for the two TE and TM polarizations and for different angles of incidence of the beam. that is, to perform the impedance matching function.
- the secondary microstructures are preferably pillars or holes or a combination of both, and preferentially have sections such as squares, hexagons or circles. They can also be located between the pillars of the primary microstructures as shown in Figure 3b. They can be of constant section or variable on their height as in the case of a pyramidal structure, conical, etc. They may be perpendicular to the surface of the component or inclined, for example at 30 °.
- This addition of a layer of secondary microstructures (one on CH and / or C2) makes it possible to adapt the impedance in order to obtain close transmission levels whatever the incident polarization, under high and low incidence so as not to not depolarize the incidence wave.
- the use of secondary microstructures allows:
- the antenna preferably comprises a fairing in the form of absorbent microwave tube, making it possible to maintain the dielectric components CH and C2 in front of the source horn S, made of absorbent materials at microwave frequencies (for example organic materials loaded with absorbent materials such as metals, magnetic materials, carbon, or low-doped semiconductor materials) is in doubling of the structural material which constitutes the fairing or directly.
- the outer structure of the fairing is typically smooth while the internal structure of the tube is determined to damp the microwave reflections that appear inside the tube during the transmission and reception of a signal.
- This structuring can be done in two ways: - Either using a layer with sublung wave microstructures so that the structure is locally adapted in height and thickness to present the equivalent effective index (as shown in patent FR 2 980 648) which allows to make an antireflection layer adapted locally to the incidence and frequency of the incident wave as shown in Figure 1 1 b.
- an antenna at the interface by orienting, for example, the sub-wavelength microstructures as a function of the incidence of the beam as shown in Figure 1 1 c.
- This orientation is not essential, we can maintain a normal orientation to the surface of the fairing.
- the size of the microstructures is different.
- the realization of these structured surfaces can be done by machining, by additive manufacturing, or by chemical etching.
- the manufacture of an antenna according to the invention comprises the following steps:
- dielectric materials that may be used include: polyamide (PA), acrylonitrile butadiene styrene (ABS), polypropylene (PP), high density polyethylene (HDPE), polytetrafluoroethylene (PTFE), polyetherimide (PEI or ULTEM), polyetheretherketone (PEEK), polycarbonate (PC), copolymers of cycloolefins (COC and COP), polystyrene (PE or Rexolite), polyphenyl sulphide (PPS and PPSF).
- PA polyamide
- ABS acrylonitrile butadiene styrene
- PP polypropylene
- HDPE high density polyethylene
- PTFE polytetrafluoroethylene
- PEEK polyetherimide
- PC polycarbonate
- COC and COP copolymers of cycloolefins
- PE or Rexolite polyphenyl sulphide
- Ceramic materials for example alumina (Al 2 O 3), aluminum nitride (AlN), zirconia (ZrO 2), Barium titanate (BaTiO 3), titanium dioxide ( ⁇ 2), silica, but also all composite materials based on organic and loaded with organic or inorganic dielectric materials (ceramic type). They can also be manufactured by chemical etching or laser engraving.
- the pillars and / or the holes are made directly in the substrate for example by these conventional manufacturing methods.
- a mold would cost between 50 keuros and 100 keuros.
- the dielectric components and / or shroud are advantageously manufactured using additive manufacturing processes characterized by high flexibility, large scale production and low cost manufacturing.
- additive manufacturing processes mention may be made of 3D modeling by melt deposition (or FDM), stereo lithography (SLA), or selective laser sintering.
- SLS acronym for Selective Laser Sintering the dielectrics used are compatible with a minimum signal absorption (estimated at -1 dB per component) and the required mechanical accuracy.
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1502346A FR3043499B1 (fr) | 2015-11-06 | 2015-11-06 | Antenne compacte a faisceau orientable |
PCT/EP2016/076678 WO2017077038A1 (fr) | 2015-11-06 | 2016-11-04 | Antenne compacte à faisceau orientable |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3371852A1 true EP3371852A1 (fr) | 2018-09-12 |
Family
ID=55486724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16790405.1A Pending EP3371852A1 (fr) | 2015-11-06 | 2016-11-04 | Antenne compacte à faisceau orientable |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3371852A1 (fr) |
FR (1) | FR3043499B1 (fr) |
WO (1) | WO2017077038A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3655803B1 (fr) * | 2017-07-18 | 2023-11-08 | Baden-Württemberg Stiftung gGmbH | Procédé de fabrication d'un système d'imagerie et système d'imagerie correspondant |
FR3082362B1 (fr) | 2018-06-12 | 2021-06-11 | Thales Sa | Systeme de depointage a formation de faisceau |
EP4131654A1 (fr) * | 2021-08-03 | 2023-02-08 | Wave Up S.r.l. | Antenne de balayage mécanique à profil bas dotée de lobes de périodicité et lobes latéraux réduits et à domaine de balayage de grande taille |
CN114267956B (zh) * | 2021-12-21 | 2023-06-30 | 中国科学院光电技术研究所 | 亚波长结构透反射超表面器件、波束扫描天线及扫描方法 |
CN115579619B (zh) * | 2022-10-27 | 2023-06-27 | 珠海中科慧智科技有限公司 | 一种双频段高增益天线及其制备方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2570886B1 (fr) * | 1984-09-21 | 1987-11-20 | Thomson Csf | Antenne hyperfrequence a balayage par prismes tournants |
FR3002697B1 (fr) * | 2013-02-22 | 2015-03-06 | Thales Sa | Systeme de deflexion configurable hyperfrequence |
-
2015
- 2015-11-06 FR FR1502346A patent/FR3043499B1/fr active Active
-
2016
- 2016-11-04 EP EP16790405.1A patent/EP3371852A1/fr active Pending
- 2016-11-04 WO PCT/EP2016/076678 patent/WO2017077038A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
FR3043499B1 (fr) | 2017-11-17 |
WO2017077038A1 (fr) | 2017-05-11 |
FR3043499A1 (fr) | 2017-05-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3371852A1 (fr) | Antenne compacte à faisceau orientable | |
EP2415120B1 (fr) | Antenne multicouche a plans paralleles, de type pillbox, et systeme d'antenne correspondant | |
EP2654126B1 (fr) | Antenne mobile directive à commutation de polarisation par déplacement de panneaux rayonnants | |
EP2573872B1 (fr) | Antenne lentille comprenant un composant diélectrique diffractif apte à mettre en forme un front d'onde hyperfréquence . | |
EP3073569B1 (fr) | Matrice de butler compacte, formateur de faisceaux bidimensionnel planaire et antenne plane comportant une telle matrice de butler | |
EP4012834B1 (fr) | Source d'antenne pour une antenne réseau à rayonnement direct, panneau rayonnant et antenne comprenant plusieurs sources d'antenne | |
EP3680982B1 (fr) | Joint tournant radiofrequence rf pour dispositif rotatif de guidage d'ondes rf et dispositif rotatif rf incluant un tel joint | |
FR2930079A1 (fr) | Capteur de rayonnement, notamment pour radar | |
EP3446362B1 (fr) | Systeme de deflexion et de pointage d'un faisceau hyperfrequence | |
EP3840124B1 (fr) | Antenne à onde de fuite en technologie afsiw | |
EP1900064B1 (fr) | Lentille inhomogene a gradient d'indice de type oeil de poisson de maxwell, systeme d'antenne et applications correspondants | |
FR2945674A1 (fr) | Dispositif de depointage du faisceau d'une antenne a balayage de faisceau utilisant le dispositif | |
FR3085234A1 (fr) | Antenne pour emettre et/ou recevoir une onde electromagnetique, et systeme comprenant cette antenne | |
EP4046241B1 (fr) | Antenne-reseau | |
EP3506429B1 (fr) | Formateur de faisceaux quasi-optique, antenne elementaire, systeme antennaire, plateforme et procede de telecommunications associes | |
EP3365943B1 (fr) | Dispositif d'antenne d'aide a l'acquisition et systeme d'antenne pour le suivi d'une cible en mouvement associe | |
WO2023218008A1 (fr) | Antenne faible profil à balayage electronique bidimensionnel | |
FR3082362A1 (fr) | Systeme de depointage a formation de faisceau | |
FR3049070A1 (fr) | Systeme optique hybride a encombrement reduit pour antenne reseau imageur | |
FR2861899A1 (fr) | Antenne-source constituee par une ouverture rayonnante compo rtant un insert | |
EP3075031B1 (fr) | Agencement de structures antennaires pour télécommunications par satellites | |
WO2018091587A1 (fr) | Dispositif de depointage de faisceau par deplacement de rouleaux dielectriques effectifs | |
WO2019020383A1 (fr) | Lentille pour systeme antennaire | |
FR3078831A1 (fr) | Antenne tridimensionnelle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20180530 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20190708 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230517 |