EP0070428B1 - 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 PDFInfo
- Publication number
- EP0070428B1 EP0070428B1 EP82105812A EP82105812A EP0070428B1 EP 0070428 B1 EP0070428 B1 EP 0070428B1 EP 82105812 A EP82105812 A EP 82105812A EP 82105812 A EP82105812 A EP 82105812A EP 0070428 B1 EP0070428 B1 EP 0070428B1
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- EP
- European Patent Office
- Prior art keywords
- segments
- central panel
- reflector
- antenna reflector
- folding
- 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
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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 foldable concavely curved antenna reflector made of rigid segments with a central panel on which the segments are arranged via two-axis joints in such a way that the individual segments are perpendicular to the central panel in the folded state of the reflector and obliquely from its periphery in the top view of the central panel the center of which are aligned, the outer ends of the segments being connected to one another in an articulated manner.
- the rigid reflectors consisting of foldable segments, such as, for. B. the foldable antenna reflector described in US-PS-31 74 397.
- This reflector has aligned segments in the folded state and connecting links at the outer end of the segments, which are connected to one another by struts arranged on the rear side of the segments.
- the arms of these struts are connected to one another in an articulated manner by means of bolts and can be pulled apart like scissors by means of flexible ropes guided over rollers arranged on angled holding parts, as a result of which the individual segments are brought into the reflector position.
- the disadvantage here is that a relatively large amount of constructive effort (struts, bolts, rollers, ropes, etc.) is necessary to unfold the segments, which, in addition to lost storage volume and any mechanical difficulties that occur when operating the individual elements, in particular in terms of weight, is considerable on the satellites affects.
- 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 from one another due to different types of conditions.
- the segments may interfere or interfere with each other during the unfolding process (e.g. due to friction of the segment sheets, summation of the bearing tolerances, etc.) and thereby a deformation of the segment sheets or blocking of 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 done 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 simple due to the simple arrangement of each folding segment and arranged on the central panel Joint with an oblique axis in space or by a double joint is given.
- 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. 1 a is arranged on a holder 2, which is attached to a support (for example, shuttle), which is tiltable about an axis a, and is attached.
- a support for example, shuttle
- a circularly designed 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. After loosening a starting bracket not shown in the figures, the folding segments 5 unfold z. B. by a centrally arranged spring drive, not shown, or by means of one or more actuators (also 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 the joint 8 in the middle of one folding segment 5, the joint 6 connects 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, provided by a double joint 4, these being positioned such that, when the folding segments 5 are rotated at the same time (see arrow direction) 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
Description
Die Erfindung betrifft einen faltbaren konkav gekrümmten Antennenreflektor aus starren Segmenten mit einem Zentralpanel, an dem über Zweiachsgelenke die Segmente derartig angeordnet sind, daß im gefalteten Zustand des Reflektors die einzelnen Segmente senkrecht auf dem Zentralpanel und in der Draufsicht auf das Zentralpanel schräg von dessen Peripherie zu dessen Mitte ausgerichtet sind, wobei die äußeren Enden der Segmente gelenkig miteinender verbunden sind.The invention relates to a foldable concavely curved antenna reflector made of rigid segments with a central panel on which the segments are arranged via two-axis joints in such a way that the individual segments are perpendicular to the central panel in the folded state of the reflector and obliquely from its periphery in the top view of the central panel the center of which are aligned, the outer ends of the segments being connected to one another in an articulated manner.
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 there are certain limits to the size of the antennas due to the existing space transport systems, such as Ariane and Shuttle, which are primarily due to the size of the available standing payload 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 mesh reflector and the rigid reflector composed of foldable segments, the mesh reflector being disregarded here because of the high accuracy requirements.
Für die aus faltbaren Segmenten bestehenden starren Reflektoren sind verschiedene Konfigurationen bekannt, wie z. B. der in der US-PS-31 74 397 beschriebene faltbare Antennenreflektor. Dieser Reflektor weist im gefalteten Zustand ausgerichtete Segmente und am äußeren Ende der Segmente Verbindungsglieder auf, die durch auf der Rückseite der Segmente angeordnete Verstrebungen miteinander verbunden sind. Die Arme dieser Verstrebungen sind durch Bolzen miteinander gelenkig verbunden und mittels über an abgewinkelten Halteteilen angeordneten Rollen geführten flexiblen Seilen scherenartig auseinanderziehbar, wodurch die einzelnen Segmente in die Reflektorstellung gebracht werden. Nachteilig ist dabei, daß zur Entfaltung der Segmente ein relativ großer konstruktiver Aufwand (Verstrebungen, Bolzen, Rollen, Seile u. a.) notwendig ist, der sich neben verlorenem Stauvolumen und eventuell auftretenden mechanischen Schwierigkeiten beim Betätigen der einzelnen Elemente, insbesondere gewichtsmäßig, auf den Satelliten erheblich auswirkt.Various configurations are known for the rigid reflectors consisting of foldable segments, such as, for. B. the foldable antenna reflector described in US-PS-31 74 397. This reflector has aligned segments in the folded state and connecting links at the outer end of the segments, which are connected to one another by struts arranged on the rear side of the segments. The arms of these struts are connected to one another in an articulated manner by means of bolts and can be pulled apart like scissors by means of flexible ropes guided over rollers arranged on angled holding parts, as a result of which the individual segments are brought into the reflector position. The disadvantage here is that a relatively large amount of constructive effort (struts, bolts, rollers, ropes, etc.) is necessary to unfold the segments, which, in addition to lost storage volume and any mechanical difficulties that occur when operating the individual elements, in particular in terms of weight, is considerable on the satellites affects.
Andere bekannte Konfigurationen von starren Antennen mit faltbaren Segmenten sind z. B. die von der Fa. Thomson Ramo Willdridge (TRW) entwickelten; sie sind in den Veröffentlichungen NASA Conference Publication 2118 "Large Space Systems Technology" - -1979,7.-8.11.1979, Seite 38 bis 41 und LSST ist Annual Development Review "Advanced Sunflower Antenna" Concept Development 7.-8.11.1979, Seite 34 bis 58 beschrieben.Other known configurations of rigid antennas with foldable segments are e.g. B. those developed by Thomson Ramo Willdridge (TRW); they are in NASA Conference Publication 2118 "Large Space Systems Technology" - -1979.7.-8.11.1979, pages 38 to 41 and LSST is Annual Development Review "Advanced Sunflower Antenna" Concept Development 7.-8.11.1979, Pages 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 Halterungen 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 from one another due to different types of conditions. There is also the risk that the segments may interfere or interfere with each other during the unfolding process (e.g. due to friction of the segment sheets, summation of the bearing tolerances, etc.) and thereby a deformation of the segment sheets or blocking of 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.Proceeding from 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 vorgesehen. Eine vorteilhafte Weiterbildung ergibt sich aus dem Unteranspruch.To achieve the object, the characterizing features of
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 done 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 simple due to the simple arrangement of each folding segment and arranged on the central panel Joint with an oblique axis in space or by a double joint is given. 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.
- 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
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
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
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 Verbindungsstäbe 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
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 high contour accuracy in the unfolded state of the
Claims (2)
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 |
|---|---|---|---|
| DE3128926A DE3128926C2 (en) | 1981-07-22 | 1981-07-22 | Foldable concave curved antenna reflector made of rigid segments |
| DE3128926 | 1981-07-22 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0070428A2 EP0070428A2 (en) | 1983-01-26 |
| EP0070428A3 EP0070428A3 (en) | 1984-03-28 |
| EP0070428B1 true EP0070428B1 (en) | 1987-11-25 |
Family
ID=6137461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82105812A Expired EP0070428B1 (en) | 1981-07-22 | 1982-06-30 | Device for connecting and guiding the separate folding elements of a foldable antenna reflector |
Country Status (7)
| Country | Link |
|---|---|
| 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) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3621578A1 (en) * | 1986-06-27 | 1988-01-07 | Dornier System Gmbh | FOLDABLE CONCAVE CURVED ANTENNA REFLECTOR |
| US5104211A (en) * | 1987-04-09 | 1992-04-14 | Harris Corp. | Splined radial panel solar concentrator |
| 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 |
| DE60211508T2 (en) * | 2002-07-31 | 2006-11-30 | Eads Astrium Gmbh | Deployable antenna reflector |
| 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 |
| CN104953229B (en) * | 2014-12-25 | 2018-06-08 | 黄天生 | A kind of telescopic satellite reception ancient cooking vessel |
| 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 (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2806134A (en) * | 1949-08-27 | 1957-09-10 | Tarcici Adnan | Collapsible reflectors |
| DE840231C (en) * | 1949-09-17 | 1952-05-29 | Leitz Ernst Gmbh | Collapsible reflector, in particular for photographic lighting purposes |
| US3064534A (en) * | 1960-04-13 | 1962-11-20 | United Aircraft Corp | Reflector for space vehicle |
| US3174397A (en) * | 1962-09-10 | 1965-03-23 | Rayan Aeronautical Co | Deployment mechanism for satellite mirror structure |
| US3618111A (en) * | 1967-04-28 | 1971-11-02 | Gen Dynamics Corp | Expandable truss paraboloidal antenna |
| 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 |
| US4030102A (en) * | 1975-10-23 | 1977-06-14 | Grumman Aerospace Corporation | Deployable reflector structure |
-
1981
- 1981-07-22 DE DE3128926A patent/DE3128926C2/en not_active Expired
-
1982
- 1982-06-30 AT AT82105812T patent/ATE31130T1/en not_active IP Right Cessation
- 1982-06-30 EP EP82105812A patent/EP0070428B1/en not_active Expired
- 1982-07-12 US US06/397,093 patent/US4511901A/en not_active Expired - Fee Related
- 1982-07-19 CA CA000407563A patent/CA1196719A/en not_active Expired
- 1982-07-21 JP JP57125955A patent/JPS5825701A/en active Granted
- 1982-07-21 ES ES1982280866U patent/ES280866Y/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0161242B2 (en) | 1989-12-27 |
| ES280866U (en) | 1985-06-16 |
| CA1196719A (en) | 1985-11-12 |
| DE3128926C2 (en) | 1985-05-02 |
| EP0070428A2 (en) | 1983-01-26 |
| JPS5825701A (en) | 1983-02-16 |
| EP0070428A3 (en) | 1984-03-28 |
| ES280866Y (en) | 1986-04-01 |
| DE3128926A1 (en) | 1983-02-10 |
| ATE31130T1 (en) | 1987-12-15 |
| US4511901A (en) | 1985-04-16 |
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