EP0068137B1 - Entfaltbarer Antennen-Netzreflektor - Google Patents

Entfaltbarer Antennen-Netzreflektor Download PDF

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Publication number
EP0068137B1
EP0068137B1 EP82104444A EP82104444A EP0068137B1 EP 0068137 B1 EP0068137 B1 EP 0068137B1 EP 82104444 A EP82104444 A EP 82104444A EP 82104444 A EP82104444 A EP 82104444A EP 0068137 B1 EP0068137 B1 EP 0068137B1
Authority
EP
European Patent Office
Prior art keywords
knee
rope
way
levers
ribs
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
Application number
EP82104444A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0068137A1 (de
Inventor
Herbert Imbiel
Henning Herbig
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.)
Airbus Defence and Space GmbH
Original Assignee
Messerschmitt Bolkow Blohm AG
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 Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Publication of EP0068137A1 publication Critical patent/EP0068137A1/de
Application granted granted Critical
Publication of EP0068137B1 publication Critical patent/EP0068137B1/de
Expired 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

Definitions

  • the invention relates to a deployable antenna network reflector, in which a reflector network is stretched between articulated, radially diverging in the unfolded state, stiff ribs.
  • Antenna reflectors of this type are used primarily in space travel, since it is important to accommodate as much payload as possible in a limited transport volume.
  • the antennas are therefore transported in the folded state and only unfolded after reaching orbit.
  • a wide variety of constructions for such folding antennas are already known, each of which has specially adapted deployment mechanisms (see Journal of Flight Science and Space Research, 4 (1980), No. 5, pages 255 to 267).
  • a deployable offset reflector is described with the features mentioned at the beginning (loc. Cit. Page 264), which is deployed in two successive phases. First of all, there are the flexible cross connectors between the rib ends, which are under tension in the folded state and, after unleashing, initiate the unfolding of the reflector by spreading the radial ribs.
  • the invention was therefore based on the object of providing a deployable antenna network reflector, the design of which can withstand high mechanical loads and in which perfect deployment is ensured at all times.
  • the arrangement can be designed such that ropes assigned to a plurality of toggle levers can be actuated together.
  • This has the effect that the entire reflector can be unfolded evenly, so that the reflector network does not come under tension on one side.
  • the toggle levers essential for the unfolding process are preferably attached at a distance from the radially outward-pointing rib ends. They can then be made shorter than if they were attached in the region of the rib ends, and moreover the angles between the two arms of the toggle lever are larger in the folded state, which facilitates the start of the unfolding process.
  • the same purpose is also served by the measure to be regarded as favorable, to provide spacers between the ribs, so that the ribs do not lie directly against one another in the folded state. The greater the initial distance between the ribs, the greater the lever angle and the easier the unfolding process can be initiated.
  • toggle levers that can be bent on one side and engage in the extended position.
  • These outer toggle levers can, in addition, similarly to the already mentioned, toggle levers arranged at a distance from the rib ends, additionally be used to support the unfolding process. For this purpose, provision is also made to allow ropes to engage the knee joints of the toggle levers connecting the rib ends.
  • the network target vector shown in a highly schematic manner in FIG. 1 is designated by 1. Only one half, the other, is shown in detail this results in a mirror-image correspondence.
  • the reflector consists essentially of a central rib 2, on the two sides of which there are three further ribs 3, 4, 5 and a terminating rib 6.
  • the ribs 2 to 5 are reinforced in the manner of a truss perpendicular to the plane of the drawing and are essentially flat, while the end ribs 6 are also reinforced in the manner of a framework, but in the form of a space framework.
  • the ribs are all attached to a mounting block 7, the ribs 3 to 6 can be pivoted. They are preferably made of carbon fiber reinforced plastic and are therefore very light, yet extremely resilient.
  • a first and a second inner toggle lever 8 and 9 are provided, which are articulated on the ribs and whose knee joints 8 'and 9' are engaged in the illustrated lever position, but are bent radially outwards can.
  • the radially outward-pointing ends of the ribs 2 to 6 are connected to one another by further, outer toggle levers 10 to 13. These are also locked in the position shown and can be bent radially outwards via their knee joints 10 'to 13'.
  • the first rope 14 runs over a first balancing roller 17, the second rope 15 over a second balancing roller 18 and the third rope 16 over a third balancing roller 19.
  • a fourth rope 20 engages with the balancing rollers 18 and 19, which over a fourth balancing roller 21 running. This in turn is engaged by a traction cable 22, on which a traction which is essentially radially inward can be exerted with the aid of a drive (not shown), for example a motor.
  • top surfaces of the ribs 2 to 6 appearing in plan view are parabolically curved perpendicular to the plane of the drawing and, in a first approximation, define a parabolic reflector surface.
  • a fine-meshed, metallic reflector network (not shown) is attached to the ribs, which can be brought into a parabolically curved shape with high approximation, for example by a second, wide-mesh adjustment network arranged underneath and adjustable cross wires connecting the two networks.
  • FIG. 2 the same numbering as in FIG. 1 is used for the same components.
  • the representation is further schematized insofar as the ribs 3 to 6 are only indicated in thin dashed lines and the toggle levers 8 to 13 are shown in thick dashed lines, for reasons of better clarity.
  • the ribs do not lie directly against one another, since they are kept at a certain distance by spacers (not shown).
  • the inner two toggle levers 8 and 9 are thus not completely folded up, so that the unfolding process can be initiated more easily due to the angle that opens between the lever arms. This is done in that the pulling rope 22 exerts a substantially radially inward pull on the compensating roller 21. This is transferred to the compensating rollers 18 and 19 and 17, so that finally a force is exerted on the knee joints of the inner and outer toggle levers 8, 9 and 10 to 12, which tries to bring the toggle lever into the extended position.
  • FIGS. 3 and 4 correspond to those in FIGS. 1 and 2.
  • the corresponding numbers have therefore been adopted.
  • the arrangement differs from that of FIGS. 1 and 2 essentially in that the inner toggle levers now only have one on their knee joints 8 'and 9 'Attacking rope 23, which runs over a compensating roller 24, are put under tension, with the aid of a tension rope 25.
  • the outer toggle levers 10 to 12 shown in dotted lines are not actuated radially from the inside, but via a peripheral tensioning rope 26.
  • rope guides 27 to 30 held on the knee joints of the outer toggle levers 10 to 13 are used, which can be designed as hollow rails provided with grooves, and from which the tensioning rope 26 is guided radially on the outside.
  • 2 to 6 guide rollers 31 to 35 are pivotally attached to the radially outward ends of the ribs, of which the tensioning cable 26, seen in the radial direction, is guided inside.
  • the pulling or tensioning cables 25 and 26 can be put under tension by, for example, motor-driven winding devices 36 and 37, the design of which is not essential to the invention. This happens when the reflector from the folded state shown in FIG. 4 is to be brought into the unfolded and locked state shown in FIG. 3.
  • FIG. 4 corresponds to that of FIG. 2, the numbering of that of FIG. 3. If the reflector is to be unfolded, a pull is simultaneously exerted on the pull cable 25 and the tension cable 26. To stretch the inner toggle levers 8 and 9, actuation of the pull cable 25 would in itself be sufficient, but the deployment process is facilitated and accelerated by additional actuation of the tension cable 26.
  • the compensating rollers 21 and 24 and 17, 18 and 19 shown in FIGS. 1 to 4 have the effect that the tension exerted on the pulling ropes 22 and 25 is passed on evenly to the knee joints of the corresponding toggle levers, so that the unfolding process is also as uniform as possible.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)
  • Details Of Aerials (AREA)
EP82104444A 1981-06-25 1982-05-21 Entfaltbarer Antennen-Netzreflektor Expired EP0068137B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3124907 1981-06-25
DE19813124907 DE3124907A1 (de) 1981-06-25 1981-06-25 "entfaltbarer antennen-netzreflektor"

Publications (2)

Publication Number Publication Date
EP0068137A1 EP0068137A1 (de) 1983-01-05
EP0068137B1 true EP0068137B1 (de) 1986-03-12

Family

ID=6135317

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104444A Expired EP0068137B1 (de) 1981-06-25 1982-05-21 Entfaltbarer Antennen-Netzreflektor

Country Status (4)

Country Link
US (1) US4498087A (enrdf_load_stackoverflow)
EP (1) EP0068137B1 (enrdf_load_stackoverflow)
JP (1) JPS586603A (enrdf_load_stackoverflow)
DE (1) DE3124907A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19818240A1 (de) * 1998-04-23 1999-11-04 Daimler Chrysler Ag Reflektor und Reflektorelement für Antennen zum Einsatz im Weltraum, sowie Verfahren zum Entfalten eines Reflektors

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3338937A1 (de) * 1983-10-27 1985-05-09 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Entfaltbarer antennen-netzreflektor
DE3423526A1 (de) * 1984-06-26 1986-01-02 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Entfaltbarer und wiedereinfaltbarer antennenreflektor
US4780726A (en) * 1984-12-03 1988-10-25 Trw Inc. Depolyable reflector
DE3532851A1 (de) * 1985-09-14 1987-04-16 Messerschmitt Boelkow Blohm Entfalt- und wiedereinfaltbarer antennenreflektor
US4862190A (en) * 1987-05-15 1989-08-29 Trw Inc. Deployable offset dish structure
US4989015A (en) * 1987-10-26 1991-01-29 Hughes Aircraft Company Unfurlable mesh reflector
JPH0452321A (ja) * 1990-06-21 1992-02-20 Misawa Homes Co Ltd 布基礎構築用ブロック
US5864324A (en) * 1996-05-15 1999-01-26 Trw Inc. Telescoping deployable antenna reflector and method of deployment
US6278416B1 (en) * 1999-11-18 2001-08-21 Harris Corporation Surface edge enhancement for space-deployable mesh antenna
FR2841047A1 (fr) * 2002-10-09 2003-12-19 Agence Spatiale Europeenne Reflecteur d'antenne pliable et depliable, notamment pour une antenne de grande envergure destinee a des applications de telecommunications spatiales
US7009578B2 (en) * 2003-11-17 2006-03-07 The Boeing Company Deployable antenna with foldable resilient members
JP6640351B2 (ja) * 2016-06-21 2020-02-05 株式会社Ｑｐｓ研究所 展開アンテナ
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

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535049A (en) * 1945-11-14 1950-12-26 Standard Telephones Cables Ltd Antenna structure
US3286270A (en) * 1964-07-01 1966-11-15 Gen Electric Collapsible parasol-like reflector utilizing flexible honeycomb shell
US3406404A (en) * 1964-10-16 1968-10-15 Ryan Aeronautical Co Furlable and unfurlable member
US3576566A (en) * 1966-10-31 1971-04-27 Hughes Aircraft Co Closed loop antenna reflector supporting structure
US3618111A (en) * 1967-04-28 1971-11-02 Gen Dynamics Corp Expandable truss paraboloidal antenna
US3541569A (en) * 1968-03-08 1970-11-17 Trw Inc Expandable parabolic reflector
US3566346A (en) * 1969-05-19 1971-02-23 Us Navy Transducer array expansion mechanism
US4030102A (en) * 1975-10-23 1977-06-14 Grumman Aerospace Corporation Deployable reflector structure
US4030103A (en) * 1975-12-10 1977-06-14 Lockheed Missiles & Space Company, Inc. Deployable offset paraboloid antenna
FR2486722A1 (fr) * 1980-07-11 1982-01-15 Aerospatiale Reflecteur d'antenne deployable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19818240A1 (de) * 1998-04-23 1999-11-04 Daimler Chrysler Ag Reflektor und Reflektorelement für Antennen zum Einsatz im Weltraum, sowie Verfahren zum Entfalten eines Reflektors
DE19818240C2 (de) * 1998-04-23 2000-06-29 Daimler Chrysler Ag Reflektor und Reflektorelement für Antennen zum Einsatz im Weltraum, sowie Verfahren zum Entfalten eines Reflektors

Also Published As

Publication number Publication date
JPS586603A (ja) 1983-01-14
EP0068137A1 (de) 1983-01-05
JPH0161241B2 (enrdf_load_stackoverflow) 1989-12-27
DE3124907A1 (de) 1983-01-13
DE3124907C2 (enrdf_load_stackoverflow) 1987-12-10
US4498087A (en) 1985-02-05

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