EP0252247B1 - Faltbarer konkav gekrümmter Antennenreflektor - Google Patents

Faltbarer konkav gekrümmter Antennenreflektor Download PDF

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Publication number
EP0252247B1
EP0252247B1 EP87106919A EP87106919A EP0252247B1 EP 0252247 B1 EP0252247 B1 EP 0252247B1 EP 87106919 A EP87106919 A EP 87106919A EP 87106919 A EP87106919 A EP 87106919A EP 0252247 B1 EP0252247 B1 EP 0252247B1
Authority
EP
European Patent Office
Prior art keywords
segments
antenna reflector
concave surface
central panel
reflector
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.)
Expired - Lifetime
Application number
EP87106919A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0252247A1 (de
Inventor
Manfred Ing.-Grad. Westphal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dornier GmbH
Original Assignee
Dornier GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dornier GmbH filed Critical Dornier GmbH
Publication of EP0252247A1 publication Critical patent/EP0252247A1/de
Application granted granted Critical
Publication of EP0252247B1 publication Critical patent/EP0252247B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
    • H01Q15/161—Collapsible reflectors
    • H01Q15/162—Collapsible reflectors composed of a plurality of rigid panels

Definitions

  • the invention relates to a foldable concavely curved antenna reflector according to the preamble of claim 1.
  • CFRP carbon fiber reinforced plastics
  • Such antenna reflectors are known, for example, from US Pat. No. 3,699,576 and US Pat. No. 3,715,760, in which the segments are pivotably arranged on a central panel at single-axis joints. In the former, the segments are partially supported on their rear surfaces by a small lattice work. In both embodiments, the individual segments are connected to one another by hinges, which supports the folding and unfolding of the individual segments.
  • JS Archer Advanced sunflower antenna concept development
  • a foldable rotationally symmetrical radiation reflector which is formed by a number of pivotable segments arranged around the axis of symmetry.
  • the segments are brought from the unfolded position to the folded state in the same way by rotating in the same direction around their respective assigned axes of rotation parallel to the axis of symmetry and at the same time pivoting upward towards the respective axis of rotation.
  • the transition from the folded to the unfolded state is achieved by the direct reversal of these simultaneously rotating and pivoting movements.
  • the disadvantage here is that the folding and unfolding of the segments is only possible by means of a complicated rotating and swiveling mechanism, which also adversely affects the accuracy of the deployed antenna. Furthermore, a stiffening strut of the folding segments to the fixed central body is very difficult to attach.
  • a network reflector in which a central housing has a mechanism for unfolding very narrow, flexible ribs.
  • the ribs are arranged around the circumference of the housing and are unwound from the housing when a worm drive is actuated by a motor, and are pulled and tensioned into the reflector position via wires which are connected to a spindle arranged under the ribs.
  • a sawtooth shape of the housing circumference is due to the tangential rib arrangement. Neither the ribs nor the sawtooth-shaped housing serve as a reflector, but an additional reflector network is required, which has to be stretched between the ribs but has a low contour accuracy.
  • a foldable antenna reflector in which the articulated connection of the outer ends of adjacent segments via an approximately in the middle of the outer end of one segment attacking connecting rod.
  • the joint connecting the segments to the central panel is a two-axis joint (similar to DE-OS 31 28 978), on which a drive serving to unfold the reflector acts in such a way that the segment is pivoted radially outward.
  • the necessary high positional accuracy of the segments can only be achieved with additional mechanical means.
  • guide rods on the head sides are necessary, which the Synchronize the rotary movement of the segments and additionally ensure the required contour accuracy when unfolded.
  • the mechanics used here require great accuracy and are very complex.
  • the object of the invention is to design an antenna reflector so that its segments can be unfolded from a compactly folded state by simple mechanics.
  • the segments should only be pivotable about an axis of rotation and can be opened synchronously by a central drive.
  • the segments When unfolded, the segments should be fixed with sufficient stability and accuracy, easy to adjust and evenly aligned when folded, and there should also be space between the segments for additional stiffeners.
  • the advantage of the invention is that the mechanism is reduced by the circular saw-shaped design of the central panel and the non-coupled segments, and the rotational and pivoting movement of the segments to one only is limited.
  • By simplifying the folding mechanism a very high level of contour accuracy is achieved in the unfolded state with good segment stiffening and a high packing density in the folded state.
  • With the decoupled arrangement of the segments they can be individually adjusted to the target contour.
  • the reduction in the components required for this results in considerable weight savings.
  • On the central panel which is in the form of a sawtooth or saw blade, two uniaxial joints are arranged on the obliquely inward edges, the axes of which are almost parallel to the edges and around which the segments connected by these joints to the central panel are folded.
  • edges and associated segments depends on the size of the antenna reflector and the available storage space in the carrier.
  • the direction of the edges and the joints arranged thereon and their pivot axes depend on the position of the segments in the folded state.
  • the base edges of the segments are chamfered according to the direction of the axes. This arrangement allows the bearing points of the uniaxial joints to be arranged far apart, as a result of which a high degree of rigidity and positional accuracy is achieved tangential to the central axis of the antenna reflector.
  • the joints can be made correspondingly small.
  • the segments can be provided with ribs or trusses on their rear surfaces in accordance with the storage space available there.
  • Large segments can be divided into sub-segments and connected to each other by a framework.
  • the deployment is advantageously controlled by a centrally arranged drive, the pivoting movement of the sub-segments being transmitted to the segments by linkages and joints (for example knee joints) with a reduction gear in front.
  • the individual sub-segments can be adjusted independently of one another by actuators. Several stops or residues known per se serve to fix them in the folded state. A central fixation by locking the folding linkage is of course possible.
  • FIG. 1 shows a satellite configuration with an antenna reflector 1 mounted on the top, which is folded on the left in the figure in order to find space within a launch vehicle. After starting and leaving the carrier tract, the antenna reflector 1 is unfolded (right figure) and the segments 7 are locked in their desired position.
  • the central panel 2 with its sawtooth or circular saw blade Clearly recognizable contour.
  • the central three-legged sub-reflector tower 17 carries the sub-reflector 18 necessary for feeding the antenna and fixes the folded segments 7 during the starting phase.
  • the pivot axis (s) 6 run almost parallel to the edges of the central panel 2 or to the foot edge of the folding segments 7.
  • the segments 7 are not perpendicular to the central panel 2 in the initial and transport phase, but assume a more or less inclined position (this depends on the shape of the central panel 2).
  • the segments 7 lie within a cylinder which corresponds approximately to the largest diameter of the central panel 2 and are arranged so that their contour curvature is rectified.
  • FIGS. 2a to 2d show individual opening phases of an antenna reflector 1 in an oblique view (above) and in a view from above (below).
  • Figure 2a shows the folded and Figure 2d the unfolded state of the antenna reflector.
  • FIG. 3 shows a section of an antenna reflector 1 in a partially folded (right) and open (left) state in a lateral (top) and bottom (bottom) view.
  • the segments 7 are designed to be self-supporting by means of a folding linkage 8 arranged and acting on their lower surfaces.
  • the segments 7 are unfolded by a central drive 9 arranged under the central panel 2, which acts on the folding linkage 8.
  • a locking device 10 also provided on the underside of the central panel 2.
  • the lock 10 is adjustable so that the desired contour can be adjusted.
  • readjustment and fine adjustment is possible by means of an actuator 11 arranged on the underside of each segment 7.
  • a toggle lever 12, on which the actuator 11 engages additionally permits fine adjustment due to a favorable transmission ratio. These adjustments can be made both earthbound and orbital.
  • the joints 5 and their pivot axis (s) 6 can be seen from the figure (below).
  • the drive 9 is provided with a suitable reduction gear, not shown in the figure.
  • the antenna reflector 1 described in FIG. 3 is reinforced by ribs 13 engaging the central panel 2 and the segments 7, which are pivoted about the pivot axis (s) 6 when unfolding.
  • the actuators 11 on the underside of each individual segment 7 are operatively connected to the ribs 13 via the folding linkage 8 and can move and adjust the segments 7 individually and independently of one another.
  • FIG. 5 shows an antenna reflector 1, similar to that described in FIGS. 3 and 4, with a central panel 2 stiffened by a framework 14, on the edges 4 of which segments 7 composed of sub-segments 15 and connected by means of the joints 5 are arranged.
  • the sub-segments 15 are stiffened by a framework 14.
  • Such a construction is particularly suitable for large antenna reflectors which have a very high contour accuracy.
  • FIG. 6 shows a segment 7 in a lateral view (below) and in a view from below (above), which is stiffened by a framework 14 arranged on the rear.
  • the segment 7 itself consists of three sub-segments 15, which are connected to the framework 14 independently of one another at at least four points. With this arrangement, thermal deformations of the Sub-segments 15 are largely decoupled, whereby the dimensional stability of the framework structure 14 is largely retained.
  • FIG. 7 shows a lock for locking the unfolded, framework-stiffened segments 7 (right figure).
  • the lock primarily consists of a toggle lever 12, the end position of which is held by a shaped spring 16 which extends when the segments 7 are unfolded.
  • segment 7 is in the folded position.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)
EP87106919A 1986-06-27 1987-05-13 Faltbarer konkav gekrümmter Antennenreflektor Expired - Lifetime EP0252247B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863621578 DE3621578A1 (de) 1986-06-27 1986-06-27 Faltbarer konkav gekruemmter antennenreflektor
DE3621578 1986-06-27

Publications (2)

Publication Number Publication Date
EP0252247A1 EP0252247A1 (de) 1988-01-13
EP0252247B1 true EP0252247B1 (de) 1991-09-25

Family

ID=6303836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87106919A Expired - Lifetime EP0252247B1 (de) 1986-06-27 1987-05-13 Faltbarer konkav gekrümmter Antennenreflektor

Country Status (4)

Country Link
US (1) US4899167A (enrdf_load_stackoverflow)
EP (1) EP0252247B1 (enrdf_load_stackoverflow)
JP (1) JPS637004A (enrdf_load_stackoverflow)
DE (1) DE3621578A1 (enrdf_load_stackoverflow)

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* Cited by examiner, † Cited by third party
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US5237337A (en) * 1991-01-18 1993-08-17 Solar Kinetics, Inc. Method and apparatus for manufacturing and erecting concave metallic membrane type reflectors
ES2039164B1 (es) * 1992-01-30 1997-01-01 Sener Ing & Sist Mecanismo de ajuste de alta precision para el posicionado correcto de estructuras deformables.
US5257034A (en) * 1992-07-29 1993-10-26 Space Systems/Loral, Inc. Collapsible apparatus for forming a paraboloid surface
GB2272331B (en) * 1992-10-31 1996-06-12 Irhad Ali Mirza Collapsible satellite dish antenna
US5446474A (en) * 1994-01-19 1995-08-29 Lockheed Missiles & Space Company, Inc. Redeployable furlable rib reflector
US5488383A (en) * 1994-01-21 1996-01-30 Lockheed Missiles & Space Co., Inc. Method for accurizing mesh fabric reflector panels of a deployable reflector
US5421376A (en) * 1994-01-21 1995-06-06 Lockheed Missiles & Space Co., Inc. Metallized mesh fabric panel construction for RF reflector
DE19500324C1 (de) * 1995-01-07 1996-05-23 Ant Nachrichtentech Antennenreflektor
DE19703346C2 (de) * 1996-05-20 1999-04-01 Endress Hauser Gmbh Co Parabolantenne zur Fokussierung von Sendeimpulsen bei der Messung des Füllstands in geschlossenen Behältern
US5864320A (en) * 1996-08-06 1999-01-26 Space Systems/Loral, Inc. Synchronous rotation dual-axis mechanical hinge assemblies
FR2780820B1 (fr) * 1998-07-02 2000-09-08 Aerospatiale Reflecteur d'antenne elastiquement deformable pour engin spatial et engin spatial comportant un tel reflecteur
US6340956B1 (en) 1999-11-12 2002-01-22 Leland H. Bowen Collapsible impulse radiating antenna
US6625288B1 (en) * 2000-03-31 2003-09-23 Intel Corporation Collapsing paraboloid dish and method
ES2261564T3 (es) * 2002-07-31 2006-11-16 Eads Astrium Gmbh Reflector de antena desplegable.
US7557995B1 (en) 2006-07-11 2009-07-07 Itt Manufacturing Enterprises, Inc. Deployable telescope shade
RU2331994C1 (ru) * 2007-01-22 2008-08-20 Федеральное государственное унитарное предприятие "Научно-производственное объединение прикладной механики им. академика М.Ф. Решетнева" Трансформируемый каркас
US7755564B2 (en) * 2007-10-31 2010-07-13 Communications & Power Industries, Inc. Deployable phasing system for emulating reflective surfaces
GB2492108A (en) * 2011-06-24 2012-12-26 Satellite Holdings Llc An automatically deployed collapsible satellite dish and method of use
US9331394B2 (en) 2011-09-21 2016-05-03 Harris Corporation Reflector systems having stowable rigid panels
FR3015130B1 (fr) * 2013-12-17 2016-01-22 Astrium Sas Structure segmentee, en particulier pour reflecteur d'antenne de satellite, pourvue d'au moins un dispositif de deploiement a parallelogramme
CN204720536U (zh) * 2014-12-25 2015-10-21 黄天生 电控制卫星接收鼎
CN104916897B (zh) * 2014-12-25 2018-09-11 黄天生 一种伸缩式卫星接收鼎
CN104916919B (zh) * 2014-12-25 2017-12-22 黄天生 电控制卫星接收鼎
CN104953229B (zh) * 2014-12-25 2018-06-08 黄天生 一种伸缩式卫星接收鼎
CN104466340A (zh) * 2014-12-25 2015-03-25 郑文艺 一种收拢式天线
CN104925563B (zh) * 2015-05-20 2016-10-19 西安电子科技大学 一种螺旋式展开天线反射面的切割方法及其展开装置
US10153559B1 (en) * 2016-06-23 2018-12-11 Harris Corporation Modular center fed reflector antenna system
IL255390B (en) * 2017-11-01 2022-07-01 Elta Systems Ltd Depolyable antenna refelector
US10516216B2 (en) * 2018-01-12 2019-12-24 Eagle Technology, Llc Deployable reflector antenna system
US10727605B2 (en) 2018-09-05 2020-07-28 Eagle Technology, Llc High operational frequency fixed mesh antenna reflector
US10811759B2 (en) 2018-11-13 2020-10-20 Eagle Technology, Llc Mesh antenna reflector with deployable perimeter
US11139549B2 (en) 2019-01-16 2021-10-05 Eagle Technology, Llc Compact storable extendible member reflector
US10797400B1 (en) 2019-03-14 2020-10-06 Eagle Technology, Llc High compaction ratio reflector antenna with offset optics
US11011821B2 (en) 2019-07-10 2021-05-18 Eagle Technology, Llc Deployable conical space antenna and associated methods
CN111197948A (zh) * 2020-01-06 2020-05-26 浏阳市梦想烟花制作燃放有限公司 一种烟花燃放点火系统用信号发射装置
US11892661B2 (en) * 2020-02-27 2024-02-06 Opterus Research and Development, Inc. Wrinkle free foldable reflectors made with composite materials
AU2022234278A1 (en) * 2021-03-08 2023-09-07 Datapath, Inc. Transportable satellite antenna terminal
US20230220940A1 (en) * 2022-01-07 2023-07-13 Inventions, Plus LLC Disk with adjustable outer diameter
US20230292892A1 (en) * 2023-04-03 2023-09-21 Gyanna Gao Invertible umbrella with canopy sections having blade structures

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US3064534A (en) * 1960-04-13 1962-11-20 United Aircraft Corp Reflector for space vehicle
US3541569A (en) * 1968-03-08 1970-11-17 Trw Inc Expandable parabolic reflector
US3699576A (en) * 1970-07-07 1972-10-17 Fairchild Industries Collapsible reflector
US3715760A (en) * 1971-04-07 1973-02-06 Trw Inc Rigid collapsible dish structure
US4315265A (en) * 1980-06-11 1982-02-09 Trw Inc. Rigid collapsible dish structure
DE8121533U1 (de) * 1981-07-22 1982-02-11 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Falt- und entfaltbarer strahlungsreflektor
DE3128926C2 (de) * 1981-07-22 1985-05-02 Dornier System Gmbh, 7990 Friedrichshafen Faltbarer konkav gekrümmter Antennenreflektor aus starren Segmenten
DE3128978C2 (de) * 1981-07-22 1987-01-08 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Faltbarer, rotationssymmetrischer Strahlungsreflektor
US4529277A (en) * 1982-04-28 1985-07-16 British Aerospace Public Limited Company Foldable reflector
US4780726A (en) * 1984-12-03 1988-10-25 Trw Inc. Depolyable reflector

Also Published As

Publication number Publication date
DE3621578C2 (enrdf_load_stackoverflow) 1988-12-01
JPS637004A (ja) 1988-01-12
EP0252247A1 (de) 1988-01-13
DE3621578A1 (de) 1988-01-07
US4899167A (en) 1990-02-06

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