EP0070428A2 - Device for connecting and guiding the separate folding elements of a foldable antenna reflector - Google Patents

Device for connecting and guiding the separate folding elements of a foldable antenna reflector Download PDF

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Publication number
EP0070428A2
EP0070428A2 EP82105812A EP82105812A EP0070428A2 EP 0070428 A2 EP0070428 A2 EP 0070428A2 EP 82105812 A EP82105812 A EP 82105812A EP 82105812 A EP82105812 A EP 82105812A EP 0070428 A2 EP0070428 A2 EP 0070428A2
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EP
European Patent Office
Prior art keywords
segments
joints
central panel
folding
antenna reflector
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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
Application number
EP82105812A
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German (de)
French (fr)
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EP0070428A3 (en
EP0070428B1 (en
Inventor
Manfred Westphal
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Dornier System GmbH
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Dornier System GmbH
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Priority to AT82105812T priority Critical patent/ATE31130T1/en
Publication of EP0070428A2 publication Critical patent/EP0070428A2/en
Publication of EP0070428A3 publication Critical patent/EP0070428A3/en
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Publication of EP0070428B1 publication Critical patent/EP0070428B1/en
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    • 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 device for connecting and guiding the individual folding elements of a foldable rigid antenna reflector, consisting of a central panel and folding segments arranged thereon via joints.
  • the disadvantages here are, on the one hand, that a relatively large number of foldable segments and associated joints are required in order to obtain a sufficiently large antenna diameter, and, on the other hand, that the individual segments are only attached or held at the foot ends of the central panel.
  • This one-sided holder does not guarantee an exact end position of the individual segments after they have unfolded, since the individual segments in the holders on the central panel can change relative to one another due to different types of states.
  • There is also a risk that the segments interfere or interfere with each other during the unfolding process for example, due to friction of the segment sheets, summation of the bearing tolerances, etc.) and that this causes the segment sheets to deform or block the unfolding.
  • the advantage of the invention is that the individual segments are connected to one another by at least one connecting rod articulated at their outer ends.
  • the folding segments are guided in a defined manner in the intermediate positions during unfolding and fixed in their end position or end position.
  • the fixation can be carried out by the connecting rod (s) itself or by one or more additional means known per se (e.g. stops and notches).
  • the position and length of the connecting rod (s) and the position of their articulations or connection points at the ends of the folding segments is defined by the start configuration and by the end position of the antenna.
  • the connecting rods bring about an additional rotation of the folding segments about an axis of rotation, which is provided by a simple joint with an axis standing obliquely in space and assigned to each folding segment and arranged on the central panel, or by a double joint.
  • the folding segments and the connecting rods are stretched and fixed to one another.
  • the smallest possible stowage volume required for the initial or start configuration is achieved by special shapes of the joints arranged on the central panel, which pivot the folding segments far inwards when stowed, so that the stowage diameter almost corresponds to the diameter of the central panel.
  • the antenna reflector 1 shown in FIG. 1a is arranged on a holder 2, which is attached to a support (e.g. shuttle), which is tiltable about an axis a, and is attached.
  • a support e.g. shuttle
  • a circular central panel 3 is rigidly attached, on the circumference of which uniformly distributed joints 4 are arranged, which connect individual folding segments 5 at their foot ends.
  • the joints 4 can be single-jointed with oblique axes 10 or double-jointed 11, 12 (FIG. 2a).
  • the folding segments 5 have joints 6 at their corners, to which connecting rods 7 are articulated, which engage in joints 8 arranged at the outer end of each folding segment 5 and connect the folding segments 5 to one another.
  • the individual folding segments 5 are perpendicular to the central panel 3.
  • FIG. 2a, b shows the antenna reflector 1 with partially unfolded folding segments 5 from an oblique view and in the view from above.
  • the folding segments 5 unfold e.g. by a centrally arranged spring drive, not shown, or by means of one or more actuators (likewise not shown in detail). It is assumed that not all folding segments 5 are driven individually by the guiding action of the outer connecting rods 7.
  • the joints 4 arranged on the central panel 3 ensure a defined and simultaneous pivoting and turning of the folding segments 5.
  • the turning is forced by the connecting rods 7 articulated at the outer end of the folding segments 5, the position of which is such that that Joint 8 in the middle of one folding segment 5 connects the joint 6 at the corner of the next folding segment 5.
  • a connecting chain is thereby achieved which, in combination with the joints 4, guides and connects the individual folding segments 5 on the central panel 3 in a defined manner. This avoids complicated interlocks.
  • the positions of the joints 6 and 8 are variable.
  • the folding segments 5 When unfolding, the folding segments 5 rotate about the axes 11, 12, which are perpendicular to one another and are provided by a double joint 4, these being positioned such that, while rotating at the same time (see arrow direction) of the folding segments 5 about the axis 11 (longitudinal axis) a radial unfolding about the axis 12 is possible.
  • the rotation of the folding segments 5 is forced by the outer connecting rods 7.
  • the end position of the unfolded folding segments 5 is reached when the connecting rods 7 with the folding segments 5 form the extended position shown in FIG. 3 and are locked together in this position.
  • adjustable stops 9 are provided on the joints 4 which connect the individual folding segments 5 to the central panel 3. This ensures an exact position of the folding segments 5 in relation to the central panel 3. The position in the circumferential direction and the correct angular position of the individual folding segments 5 is achieved by the connecting rods 7, which fix them in the end position.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)
  • Details Of Aerials (AREA)

Abstract

This invention relates to an improvement in a collapsible antenna reflector with rigid, collapsible elements for high accuracy of contour, composed of a central panel and collapsible segments mounted thereto by means of joints, the improvement comprising means mounting the individual collapsible segments (5) so that in their collapsed state their contour curvature is equidirectional, with the individual collapsible segments being mounted perpendicularly to the central panel and being arranged from its periphery obliquely to the antenna axis.

Description

Die Erfindung betrifft eine Vorrichtung zur Verbindung und Führung der einzelnen Faltelemente eines faltbaren starren Antennenreflektors, bestehend aus einem Zentralpanel und daran über Gelenke angeordnete Faltsegmente.The invention relates to a device for connecting and guiding the individual folding elements of a foldable rigid antenna reflector, consisting of a central panel and folding segments arranged thereon via joints.

Die Entwicklung in der Raumfahrt führt zu immer leistungsfähigeren Antennensystemen hin, wobei diesen eine zentrale Bedeutung zukommt, wie beispielsweise in den Bereichen Kommunikation, Navigation, Fernerkundung und Energieübertragung.The development in space travel leads to increasingly powerful antenna systems, whereby these are of central importance, such as in the areas of communication, navigation, remote sensing and energy transmission.

Diese steigenden Anforderungen führen zu Antennen mit höherer Konturgenauigkeit und grösserem Durchmesser. Durch die Verwendung von kohlenstoffaserverstärktem Kunststoff (CFK) und starren Reflektorschalen konnte die Konturgenauigkeit zwar stark verbessert werden, jedoch sind der Grösse der Antennen aufgrund der vorhandenen Raumtransport-Systeme, wie Ariane und Shuttle, gewisse Grenzen gesetzt, welche primär durch die Grösse des zur Verfügung stehenden Nutzlastraumes bestimmt sind. Diese Grenzen sind nur überschreitbar, wenn die Antennen während des Transports gefaltet sind und erst im Orbit entfaltet werden. Hierzu gibt es prinzipiell zwei Alternativen, den Netzreflektor und den aus faltbaren Segmenten zusammengesetzten starren Reflektor, wobei der Netzreflektor wegen der hohen Genauigkeitsanforderungen hier ausser Betracht bleibt.These increasing requirements lead to antennas with a higher contour accuracy and a larger diameter. By using carbon fiber reinforced plastic (CFRP) and rigid reflector shells, the contour accuracy could be greatly improved, but the size of the antennas due to the existing space transport systems, such as Ariane and Shuttle, have certain limits, which are primarily due to the size of the available standing utility load space are determined. These limits can only be exceeded if the antennas are folded during transport and are only deployed in orbit. There are basically two alternatives to this, the network reflector and the rigid reflector composed of foldable segments, the network reflector being disregarded here because of the high accuracy requirements.

Für die aus faltbaren Segmenten bestehenden starren Antennen sind verschiedene Konfigurationen bekannt; z.B. wie die von der Fa. Thomson Ramo Willdridge (TRW) entwickelten und in den Veröffentlichungen NASA Conference Publication 2118 "Large Space Systems Technology" - 1979, 7.-8.11.1979, Seite 38 bis 41 und LSST 1st Annual Development Review "Advanced Sunflower Antenna" Concept Development 7.-8.11.1979r Seite 34 bis 58 beschrieben.Various configurations are known for the rigid antennas consisting of foldable segments; for example, such as those developed by the company Thomson Ramo Willdridge (TRW) and in the publications NASA Conference Publication 2118 "L arge Space Systems Technology" - st 1979, the seventh-11.8.1979, page 38 to 41 and LSST 1 Annual Development Review. "Advanced Sunflower Antenna" Concept Development November 7-8, 1979 r page 34 to 58.

Nachteilig ist hierbei zum einen, dass eine relativ grosse Anzahl von faltbaren Segmenten und zugehörigen Gelenken benötigt wird, um einen ausreichend grossen Antennendurchmesser zu erhalten und zum anderen, dass die einzelnen Segmente nur an ihren Fußenden am Zentralpanel befestigt bzw. gehalten sind. Durch diese einseitige Halterung ist eine genaue Endlage der einzelnen Segmente nach ihrer Entfaltung nicht gewährleistet, da sich die einzelnen Segmente in den Halterüngen am Zentralpanel durch verschieden geartete Zustände zueinander verändern können. Auch besteht die Gefahr, dass sich die Segmente während des Entfaltvorgangs gegeneinander stören oder behindern (z.B. durch Reibung der Segmentblätter, Summierung der Lagertoleranzen u.a.) und dadurch eine Deformierung der Segmentblätter oder Blockierung des Entfaltens hervorgerufen wird.The disadvantages here are, on the one hand, that a relatively large number of foldable segments and associated joints are required in order to obtain a sufficiently large antenna diameter, and, on the other hand, that the individual segments are only attached or held at the foot ends of the central panel. This one-sided holder does not guarantee an exact end position of the individual segments after they have unfolded, since the individual segments in the holders on the central panel can change relative to one another due to different types of states. There is also a risk that the segments interfere or interfere with each other during the unfolding process (for example, due to friction of the segment sheets, summation of the bearing tolerances, etc.) and that this causes the segment sheets to deform or block the unfolding.

Davon ausgehend ist es Aufgabe der Erfindung, eine Vorrichtung zu schaffen, mit der die einzelnen Segmente miteinander verbunden sind, derart, dass die Segmente während des Entfaltvorganges und in ihrer Endlage bzw. Endstellung miteinander verbunden und fixiert sind, um dadurch die Konturgenauigkeit und Formstabilität des Antennenreflektors und den Verriegelungsaufwand der einzelnen Segmente zu optimieren.Based on this, it is an object of the invention to provide a device with which the individual segments are connected to one another in such a way that the segments are connected and fixed to one another during the unfolding process and in their end position or end position, in order thereby to ensure the contour accuracy and dimensional stability of the To optimize the antenna reflector and the locking effort of the individual segments.

Zur Lösung der gestellten Aufgabe sind erfindungsgemäss die kennzeichnenden Merkmale von Anspruch 1 und die der ihm folgenden Unteransprüche vorgesehen.To achieve the object, the characterizing features of claim 1 and the subclaims that follow it are provided according to the invention.

Der Vorteil der Erfindung besteht darin, dass die einzelnen Segmente durch wenigstens einen jeweils an ihren äusseren Enden angelenkten Verbindungsstab miteinander verbunden sind. Dadurch werden die Faltsegmente in den Zwischenstellungen während des Entfaltens definiert geführt und in ihrer Endlage bzw. Endstellung fixiert. Die Fixierung kann dabei durch den bzw. die Verbindungsstäbe selbst oder durch ein oder mehrere an sich bekannte zusätzliche Mittel erfolgen (z.B. Anschläge und Rasten). Die Position und Länge des bzw. der Verbindungsstäbe, sowie die Lage ihrer Anlenkungen bzw. Anschlusspunkte an den Enden der Faltsegmente wird durch die Startkonfiguration und durch die Endstellung der Antenne definiert. Während des Entfaltvorgangs bewirken die Verbindungsstäbe ein zusätzliches Drehen der Faltsegmente um eine Drehachse, die durch ein einem jeden Faltsegment zugeordnetes und am Zentralpanel angeordnetes einfaches Gelenk mit schräg im Raum stehender Achse oder durch ein Doppelgelenk gegeben ist. In der Endlage bzw. Endstellung sind die Faltsegmente und die Verbindungsstäbe gestreckt und zueinander fixiert.The advantage of the invention is that the individual segments are connected to one another by at least one connecting rod articulated at their outer ends. As a result, the folding segments are guided in a defined manner in the intermediate positions during unfolding and fixed in their end position or end position. The fixation can be carried out by the connecting rod (s) itself or by one or more additional means known per se (e.g. stops and notches). The position and length of the connecting rod (s) and the position of their articulations or connection points at the ends of the folding segments is defined by the start configuration and by the end position of the antenna. During the unfolding process, the connecting rods bring about an additional rotation of the folding segments about an axis of rotation, which is provided by a simple joint with an axis standing obliquely in space and assigned to each folding segment and arranged on the central panel, or by a double joint. In the end position or end position, the folding segments and the connecting rods are stretched and fixed to one another.

Ein für die Ausgangs- bzw. Startkonfiguration benötigtes möglichst geringes Stauvolumen wird durch spezielle Formen der am Zentralpanel angeordneten Gelenke erzielt, welche die Faltsegmente im verstauten Zustand weit nach innen schwenken, so dass der Staudurchmesser nahezu dem Durchmesser des Zentralpanels entspricht.The smallest possible stowage volume required for the initial or start configuration is achieved by special shapes of the joints arranged on the central panel, which pivot the folding segments far inwards when stowed, so that the stowage diameter almost corresponds to the diameter of the central panel.

Ausführungsbeispiele sind nachstehend beschrieben und durch Skizzen erläutert.Exemplary embodiments are described below and explained by sketches.

Es zeigen:

  • Fig. 1a, b einen Antennenreflektor mit gefalteten Segmenten,
  • Fig. 2a, b den Antennenreflektor mit teilweise entfalteten Segmenten gemäss Fig. 1a, b,
  • Fig. 3 den Antennenreflektor mit voll in die Endlage bzw. Endstellung entfalteten Segmenten und fixierten Verbindungsstäben gemäss Fig. 1a, b und Fig. 2a, b.
Show it:
  • 1a, b an antenna reflector with folded segments,
  • 2a, b the antenna reflector with partially unfolded segments according to Fig. 1a, b,
  • 3 shows the antenna reflector with segments fully deployed in the end position or end position and fixed connecting rods according to FIGS. 1a, b and 2a, b.

Der aus Fig. 1a ersichtliche Antennenreflektor 1 ist auf einer Halterung 2 angeordnet, welche um eine Achse a kippbar an einem in der Figur nicht näher dargestellten Träger (z.B. Shuttle) befestigt ist. Am sich verjüngenden Ende der Halterung 2 ist ein kreisförmig gestaltetes Zentralpanel 3 starr befestigt, an dessen Umfang gleichmässig verteilte Gelenke 4 angeordnet sind, welche einzelne Faltsegmente 5 an ihren Fußenden verbinden. Die Gelenke 4 können je nach Ausführung des Antennenreflektors 1 einfachgelenkig mit schrägen Achsen 10 oder doppelgelenkig 11, 12 ausgebildet sein (Fig. 2a). Am gegenüberliegenden Kopfende weisen die Faltsegmente 5 an ihren Ecken Gelenke 6 auf, an die Verbindungsstäbe 7 angelenkt sind, welche in am äusseren Ende eines jeden Faltsegments 5 angeordnete Gelenke 8 greifen und die Faltsegmente 5 miteinander verbinden. In der Grund- bzw. Ausgangsposition stehen die einzelnen Faltsegmente 5 zum Zentralpanel 3 senkrecht.The antenna reflector 1 shown in FIG. 1a is arranged on a holder 2, which is attached to a support (e.g. shuttle), which is tiltable about an axis a, and is attached. At the tapered end of the holder 2, a circular central panel 3 is rigidly attached, on the circumference of which uniformly distributed joints 4 are arranged, which connect individual folding segments 5 at their foot ends. Depending on the design of the antenna reflector 1, the joints 4 can be single-jointed with oblique axes 10 or double-jointed 11, 12 (FIG. 2a). At the opposite head end, the folding segments 5 have joints 6 at their corners, to which connecting rods 7 are articulated, which engage in joints 8 arranged at the outer end of each folding segment 5 and connect the folding segments 5 to one another. In the basic or starting position, the individual folding segments 5 are perpendicular to the central panel 3.

Aus Fig. 1b ist die in Fig. 1a erwähnte Senkrechtstellung der gefalteten Faltsegmente 5 zum Zentralpanel 3 sowie die daran angeordneten Gelenke 4, 6, 8 und daran angreifenden Verbindungsstäbe 7 in der Ansicht von oben ersichtlich.From Fig. 1b the vertical position of the folded folding segments 5 to the central panel 3 mentioned in Fig. 1a as well as the joints 4, 6, 8 and connecting rods 7 engaging thereon can be seen in the view from above.

Aus Fig. 2a, b ist der Antennenreflektor 1 mit teilweise entfalteten Faltsegmenten 5 aus einer Schrägsicht und in der Ansicht von oben ersichtlich. Nach Lösen einer in den Figuren nicht näher gezeigten Starthalterung entfalten sich die Faltsegmente 5 z.B. durch einen zentral angeordneten nicht näher gezeigten Federantrieb oder mittels eines oder mehrerer Steller (gleichfalls nicht näher dargestellt). Dabei wird davon ausgegangen, dass durch die Führungswirkung der äusseren Verbindungsstäbe 7 nicht alle Faltsegmente 5 einzeln angetrieben werden.2a, b shows the antenna reflector 1 with partially unfolded folding segments 5 from an oblique view and in the view from above. After loosening a starter not shown in the figures, the folding segments 5 unfold e.g. by a centrally arranged spring drive, not shown, or by means of one or more actuators (likewise not shown in detail). It is assumed that not all folding segments 5 are driven individually by the guiding action of the outer connecting rods 7.

Während des Entfaltvorganges gewährleisten die am Zentralpanel 3 angeordneten Gelenke 4 ein definiertes und gleichzeitiges Schwenken und Drehen der Faltsegmente 5. Dabei wird das Drehen durch die am äusseren Ende der Faltsegmente 5 angelenkten Verbi-ndungsstäbe 7 erzwungen, deren Position so getroffen ist, dass jeweils das Gelenk 8 in der Mitte des einen Faltsegments 5 das Gelenk 6 an der Ecke des nächsten Faltsegments 5 verbindet. Dadurch wird eine Verbindungskette erzielt, die in Kombination mit den Gelenken 4 die einzelnen Faltsegmente 5 am Zentralpanel 3 definiert führt und verbindet. Komplizierte Verriegelungen werden dadurch vermieden. Alternativ hierzu sind die Positionen der Gelenke 6 und 8 variabel. Beim Entfalten drehen die Faltsegmente 5 um die durch ein Doppelgelenk 4 gegebenen senkrecht zueinanderstehenden Achsen 11, 12, wobei diese so positioniert sind, dass bei gleichzeitigem Drehen (siehe Pfeilrichtung) der Faltsegmente 5 um die Achse 11 (Längsachse) ein radiales Entfalten um die Achse 12 möglich ist. Dabei wird die Drehung der Faltsegmente 5 durch die äusseren Verbindungsstäbe 7 erzwungen. Die Endstellung der entfalteten Faltsegmente 5 ist dann erreicht, wenn die Verbindungsstäbe 7 mit den Faltsegmenten 5 die aus Fig. 3 ersichtliche gestreckte Lage bilden und in dieser Stellung miteinander verriegelt sind.During the unfolding process, the joints 4 arranged on the central panel 3 ensure a defined and simultaneous pivoting and turning of the folding segments 5. The turning is forced by the connecting rods 7 articulated at the outer end of the folding segments 5, the position of which is such that that Joint 8 in the middle of one folding segment 5 connects the joint 6 at the corner of the next folding segment 5. A connecting chain is thereby achieved which, in combination with the joints 4, guides and connects the individual folding segments 5 on the central panel 3 in a defined manner. This avoids complicated interlocks. Alternatively, the positions of the joints 6 and 8 are variable. When unfolding, the folding segments 5 rotate about the axes 11, 12, which are perpendicular to one another and are provided by a double joint 4, these being positioned such that, while rotating at the same time (see arrow direction) of the folding segments 5 about the axis 11 (longitudinal axis) a radial unfolding about the axis 12 is possible. The rotation of the folding segments 5 is forced by the outer connecting rods 7. The end position of the unfolded folding segments 5 is reached when the connecting rods 7 with the folding segments 5 form the extended position shown in FIG. 3 and are locked together in this position.

Zur Erzielung einer hohen Konturgenauigkeit im entfalteten Zustand des Antennenreflektors 1 bzw. seiner Faltsegmente 5 sind an den Gelenken 4, welche die einzelnen Faltsegmente 5 mit dem Zentralpanel 3 verbinden, justierbare Anschläge 9 vorgesehen. Dadurch ist eine genaue Position der Faltsegmente 5 in Relation zum Zentralpanel 3 gewährleistet. Die Position in Umfangsrichtung, sowie die richtige Winkellage der einzelnen Faltsegmente 5 wird durch die Verbindungstäbe 7 erzielt, die diese in der Endstellung fixieren.In order to achieve a high contour accuracy in the unfolded state of the antenna reflector 1 or its folding segments 5, adjustable stops 9 are provided on the joints 4 which connect the individual folding segments 5 to the central panel 3. This ensures an exact position of the folding segments 5 in relation to the central panel 3. The position in the circumferential direction and the correct angular position of the individual folding segments 5 is achieved by the connecting rods 7, which fix them in the end position.

Claims (3)

1. Vorrichtung zur Verbindung und Führung der einzelnen Faltelemente eines faltbaren starren Antennenreflektors, bestehend aus einem Zentralpanel und daran über Gelenke angeordnete Faltsegmente, dadurch gekennzeichnet, dass die äusseren Enden der Faltsegmente (5) über daran angeordnete Gelenke (6, 8) durch wenigstens einen Verbindungsstab (7) miteinander verbunden sind, der die einzelnen Faltsegmente (5) beim Entfalten definiert führt und in der Endstellung fixiert.1. Device for connecting and guiding the individual folding elements of a foldable rigid antenna reflector, consisting of a central panel and folding segments arranged thereon via joints, characterized in that the outer ends of the folding segments (5) via hinges (6, 8) arranged thereon by at least one Connecting rod (7) are connected to one another, which guides the individual folding segments (5) in a defined manner when unfolding and fixes them in the end position. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die am Zentralpanel (3) angeordneten Gelenke als mit schräger Raumachse (10) angreifende Einachsgelenke (4) ausgebildet sind.2. Device according to claim 1, characterized in that the joints arranged on the central panel (3) are designed as single-axis joints (4) engaging with an inclined spatial axis (10). 3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die am Zentralpanel (3) angeordneten Gelenke als Zweiachsgelenke (10) ausgebildet sind.3. Device according to claim 1, characterized in that the joints arranged on the central panel (3) are designed as two-axis joints (10).
EP82105812A 1981-07-22 1982-06-30 Device for connecting and guiding the separate folding elements of a foldable antenna reflector Expired EP0070428B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82105812T ATE31130T1 (en) 1981-07-22 1982-06-30 DEVICE FOR CONNECTING AND GUIDING THE INDIVIDUAL FOLDING ELEMENTS OF A FOLDABLE RIGID ANTENNA REFLECTOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3128926 1981-07-22
DE3128926A DE3128926C2 (en) 1981-07-22 1981-07-22 Foldable concave curved antenna reflector made of rigid segments

Publications (3)

Publication Number Publication Date
EP0070428A2 true EP0070428A2 (en) 1983-01-26
EP0070428A3 EP0070428A3 (en) 1984-03-28
EP0070428B1 EP0070428B1 (en) 1987-11-25

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EP82105812A Expired EP0070428B1 (en) 1981-07-22 1982-06-30 Device for connecting and guiding the separate folding elements of a foldable antenna reflector

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US (1) US4511901A (en)
EP (1) EP0070428B1 (en)
JP (1) JPS5825701A (en)
AT (1) ATE31130T1 (en)
CA (1) CA1196719A (en)
DE (1) DE3128926C2 (en)
ES (1) ES280866Y (en)

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CN104953229A (en) * 2014-12-25 2015-09-30 黄天生 Retractable satellite receiving pot

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US4841305A (en) * 1988-02-01 1989-06-20 Dalsat, Inc. Method of sectioning an antennae reflector
JPH04306319A (en) * 1991-01-11 1992-10-29 Misawa Homes Co Ltd Foundation construction
US5255006A (en) * 1991-08-29 1993-10-19 Space Systems/Loral, Inc. Collapsible apparatus for forming a dish shaped surface
US5257034A (en) * 1992-07-29 1993-10-26 Space Systems/Loral, Inc. Collapsible apparatus for forming a paraboloid surface
DE19818240C2 (en) * 1998-04-23 2000-06-29 Daimler Chrysler Ag Reflector and reflector element for antennas for use in space, and method for unfolding a reflector
ES2261564T3 (en) * 2002-07-31 2006-11-16 Eads Astrium Gmbh REFLECTOR OF DISPLAYABLE ANTENNA.
US7557995B1 (en) 2006-07-11 2009-07-07 Itt Manufacturing Enterprises, Inc. Deployable telescope shade
FR2974787B1 (en) * 2011-05-05 2014-11-28 Thales Sa DEVICE FOR PROTECTING A MULTIFACEAL OPTICAL INSTRUMENT
US9331394B2 (en) 2011-09-21 2016-05-03 Harris Corporation Reflector systems having stowable rigid panels
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

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EP0252247A1 (en) * 1986-06-27 1988-01-13 Dornier Gmbh Collapsible antenna reflector with a concave surface
CN104953229A (en) * 2014-12-25 2015-09-30 黄天生 Retractable satellite receiving pot
CN104953229B (en) * 2014-12-25 2018-06-08 黄天生 A kind of telescopic satellite reception ancient cooking vessel

Also Published As

Publication number Publication date
JPS5825701A (en) 1983-02-16
US4511901A (en) 1985-04-16
EP0070428A3 (en) 1984-03-28
ES280866U (en) 1985-06-16
ES280866Y (en) 1986-04-01
JPH0161242B2 (en) 1989-12-27
DE3128926A1 (en) 1983-02-10
EP0070428B1 (en) 1987-11-25
DE3128926C2 (en) 1985-05-02
ATE31130T1 (en) 1987-12-15
CA1196719A (en) 1985-11-12

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