EP3326237A1 - Ensemble de réflecteurs d'antennes électromagnétiques - Google Patents
Ensemble de réflecteurs d'antennes électromagnétiquesInfo
- Publication number
- EP3326237A1 EP3326237A1 EP16736217.7A EP16736217A EP3326237A1 EP 3326237 A1 EP3326237 A1 EP 3326237A1 EP 16736217 A EP16736217 A EP 16736217A EP 3326237 A1 EP3326237 A1 EP 3326237A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflectors
- fiber
- composite material
- tubular structure
- resin composite
- 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
- H01Q1/12—Supports; Mounting means
- H01Q1/1207—Supports; Mounting means for fastening a rigid aerial element
- H01Q1/1228—Supports; Mounting means for fastening a rigid aerial element on a boom
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/288—Satellite antennas
Definitions
- the present invention relates to sets of reflectors for electromagnetic antennas. Although not exclusively, it is particularly suitable for implementation in artificial communication satellites.
- Electromagnetic antenna reflector assemblies are already known comprising two shell-shaped reflectors, secured to one another by means of a common support.
- the two reflectors and said common support can even be made in a single molding piece.
- these known antenna reflector assemblies are mechanically and thermally coupled to one another via said common support, so that the thermoelastic deformations of one are transmitted to the other and all the thermoelastic deformations of the reflectors can combine to amplify their negative effects on the performance of the associated antennas.
- these known antenna reflector assemblies must have a common high mass carrier and may only include reflectors of identical technology.
- the known antenna reflector assemblies are made according to particular antenna configurations, which can not be adapted to different configurations.
- the assembly comprising at least two electromagnetic antenna reflectors, said reflectors having the shape of shells and said shells being borne by a common support, is remarkable in that:
- said shells are made of a fiber-resin composite material
- said common support is a tubular structure consisting of fiber-resin composite tube sections assembled to each other;
- said shells are individually fastened to said tubular structure by means of spacer tabs.
- the shells and the common support are made of fiber-resin composite material, in particular based on carbon fibers and epoxy resin, said assembly may be light, especially since said shells may be thin, while preserving excellent mechanical properties;
- the common support is in the form of a tubular assembly, it is easily adaptable to a plurality of different configurations;
- spacers preferably also made of fiber-resin composite material, are interposed between said shells and the common support, the thermal and mechanical couplings between said shells by means of the common support are practically eliminated;
- one of the reflectors in the set can work in a frequency band below the Ka band, while another reflector is working in the latter band or in the Q / V band.
- the shell of the reflector can be perforated, which further lowers the mass and makes it insensitive to acoustic stresses.
- said pipe sections of the tubular structures are assembled to one another by means of sleeves, also of fiber-resin composite material, to which they are fixed by gluing.
- the spacer tabs may also be made of a composite fiber-resin material and have the shape of a bracket whose branch is glued to the convex face of the corresponding shell and whose other branch is glued to a tube section of the tubular structure. Such a spacer tab makes it possible to maintain a gap between the reflector shell and the tubular structure and thus to decouple said reflector shell from the latter.
- said tubular structure in the case where said set of reflectors is mounted on the body of an artificial satellite so as to be able to occupy a folded position and then an extended position, it is advantageous for said tubular structure to comprise at least one arm allowing the articulation of said set of reflectors on said satellite body.
- Figure 1 is a rear view of an embodiment of the set of antenna reflectors according to the present invention, to see the common support and the convex rear face of said reflectors.
- Figure 2 is also a rear view of an alternative embodiment of the set of antenna reflectors according to the present invention.
- FIGS. 3, 4 and 5 illustrate examples of assembly sleeve for the pipe sections of the common supports of the reflector assemblies of FIGS. 1 and 2.
- Figure 6 shows, in schematic section, a spacer tab connecting the convex rear face of a reflector to a tube section of the common support.
- FIG. 7 illustrates a nonlimiting exemplary embodiment of the perforated structure of an antenna shell working in a frequency band below the Ka band.
- the exemplary embodiments R1 and R2 of sets of electromagnetic antenna reflectors each comprise a tubular structure S 1 or S 2 constituted by the assembly of tube sections T of fiber-composite composite material.
- resin for example based on carbon fibers and epoxy resin.
- the pipe sections T are assembled to one another by means of casing sleeves M, also made of fiber-resin composite material, in which the ends of the pipe sections T are nested and glued together.
- the casing sleeves M may also be made of a composite material based on carbon fibers and epoxy resin and may have different shapes.
- casing sleeves M respectively adapted to the assembly of two sections of tube T at right angles, to the assembly of two sections of FIG. obtuse angle tube T and the assembly of three sections of tube T.
- other types of sleeves M than those illustrated in Figures 4, 5 and 6 can be used.
- the tubular structures S1 and S2 serve as a common support for at least two antenna reflectors.
- the tubular structure S 1 of FIG. 1 carries two reflectors A1 and A2, whereas the tubular structure S2 of FIG. 2 bears three reflectors A1, A2 and A3.
- Each of the reflectors A1, A2 and A3 is constituted by a thin shell C of fiber-resin composite material (see FIG. 6), preferably made of a carbon fiber-epoxy resin composite material.
- the structure of its thin shell C may be solid or perforated.
- the days of said shell may be formed by meshes m formed in the interlacing of the strands of fibers F constituting said shell.
- the fiber locks F of the fiber interlacing forming its shell C do not provide any mesh between them. so that said shell is full.
- each of the reflectors A 1, A2, A3 are individually fastened to the tubular structures S1 and S2 by means of spacer tabs E.
- the spacer tabs E have the form of bracket whose one branch is glued to the convex face f of the corresponding shell C and whose other branch is glued to a tube section T of the structure S1 or S2.
- the spacer tabs E are made of a fiber-resin composite material, preferably based on carbon fibers and epoxy resin, and they maintain a gap e between the structure S 1, S 2 and the shell C.
- the spacer tabs E may comprise an opposite reinforcement angle r, made of fiber-resin composite material, bonded to said convex face f of the corresponding shell C.
- the sets of reflectors R 1 and R 2 may comprise an arm B 1 or B 2, forming part of the tubular structure S 1 or S 2 and intended to allow the articulation of said sets of reflectors on the body of a artificial satellite.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Aviation & Aerospace Engineering (AREA)
- Aerials With Secondary Devices (AREA)
- Details Of Aerials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1501553A FR3039326B1 (fr) | 2015-07-22 | 2015-07-22 | Ensemble de reflecteurs d'antennes electromagnetiques |
| PCT/FR2016/000103 WO2017013310A1 (fr) | 2015-07-22 | 2016-06-23 | Ensemble de réflecteurs d'antennes électromagnétiques |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3326237A1 true EP3326237A1 (fr) | 2018-05-30 |
| EP3326237C0 EP3326237C0 (fr) | 2023-08-02 |
| EP3326237B1 EP3326237B1 (fr) | 2023-08-02 |
Family
ID=55072703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16736217.7A Active EP3326237B1 (fr) | 2015-07-22 | 2016-06-23 | Ensemble de réflecteurs d'antennes électromagnétiques |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US10367245B2 (fr) |
| EP (1) | EP3326237B1 (fr) |
| CA (1) | CA2991526C (fr) |
| ES (1) | ES2958399T3 (fr) |
| FR (1) | FR3039326B1 (fr) |
| WO (1) | WO2017013310A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3084007B1 (fr) | 2018-07-19 | 2022-01-14 | Arianegroup Sas | Piece de liaison thermodurcissable partiellement polymerisee et procedes de fabrication et d'assemblage d'une telle piece de liaison |
| FR3086018B1 (fr) | 2018-09-18 | 2021-05-21 | Arianegroup Sas | Dispositif de liaison modulaire verrouillable |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6049312A (en) * | 1998-02-11 | 2000-04-11 | Space Systems/Loral, Inc. | Antenna system with plural reflectors |
| US6140978A (en) * | 1999-09-08 | 2000-10-31 | Harris Corporation | Dual band hybrid solid/dichroic antenna reflector |
| US7113145B1 (en) * | 2005-05-23 | 2006-09-26 | Valmont Industries, Inc. | Antenna mounting bracket assembly |
| US9680229B2 (en) * | 2013-06-28 | 2017-06-13 | The Boeing Company | Modular reflector assembly for a reflector antenna |
| FR3015787B1 (fr) | 2013-12-23 | 2017-06-09 | Thales Sa | Procede pour definir la structure d'une antenne en bande ka |
-
2015
- 2015-07-22 FR FR1501553A patent/FR3039326B1/fr active Active
-
2016
- 2016-06-23 ES ES16736217T patent/ES2958399T3/es active Active
- 2016-06-23 US US15/742,389 patent/US10367245B2/en active Active
- 2016-06-23 WO PCT/FR2016/000103 patent/WO2017013310A1/fr not_active Ceased
- 2016-06-23 CA CA2991526A patent/CA2991526C/fr active Active
- 2016-06-23 EP EP16736217.7A patent/EP3326237B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US20180198187A1 (en) | 2018-07-12 |
| EP3326237C0 (fr) | 2023-08-02 |
| CA2991526C (fr) | 2023-10-31 |
| WO2017013310A1 (fr) | 2017-01-26 |
| US10367245B2 (en) | 2019-07-30 |
| FR3039326B1 (fr) | 2017-08-18 |
| ES2958399T3 (es) | 2024-02-08 |
| EP3326237B1 (fr) | 2023-08-02 |
| CA2991526A1 (fr) | 2017-01-26 |
| FR3039326A1 (fr) | 2017-01-27 |
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