Automatic-resilient, reconfigurable, satellite-borne and expandable antenna

A self-rebound, space-borne technology, applied in antennas, folded antennas, electrical components, etc., can solve the problems of poor reflector shape and surface accuracy, and achieve the effects of improved accuracy, alleviation of thermal deformation, and simple structure.

Active Publication Date: 2017-09-29
XIDIAN UNIV
6 Cites 14 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: the flexibility required for the thin-walled radiation ribs of the e...
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Method used

After variable body parabolic radiation rib once regulates energization and heats up, unfolds gradually, and film reflection surface rotates gradually under the traction of six variable body parabolic radiation ribs; Temperature, the secondary variant of the variable body parabolic radiating rib, along the width direction, that is, the overall antenna is shrunk axially, and becomes a corrugated plate shape, which increases the bending stiffness of the variable body parabolic radiating rib. The forming method of the metal reflective layer and the film layer on the reflective surface of the film is to use the film surface coated with the metal reflective layer to form a paraboloid at one time by thermoplastic hot pressin...
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Abstract

The invention belongs to the technical field of an antenna, and discloses an automatic-resilient, reconfigurable, satellite-borne and expandable antenna. The automatic-resilient, reconfigurable, satellite-borne and expandable antenna is provided with a central cylinder, a plurality of variable parabolic radiation ribs and a thin film reflection surface, wherein the plurality of variable parabolic radiation ribs are wound around the central cylinder, and the thin film reflection surface is folded among the variable parabolic radiation ribs which are in winding states in an annular concave-convex shape. With the adoption of the variable parabolic radiation ribs manufactured from an enhanced polymer, an expansion structure is only provided with the variable parabolic radiation ribs and the carbon fiber central cylinder which can be wound, the automatic-resilient, reconfigurable, satellite-borne and expandable antenna is simple in structure, the automatic-resilient function can be achieved, a complicated folding and unfolding structure comprising the central cylinder and a gear transmission mechanism of a traditional winding rib antenna is not needed, and the service reliability of the antenna is improved; a shape memory actuator layer is attached onto a back surface of a reflection film, deformation trends under a space thermal radiation effect offset with each other, thermal deformation of a film surface under the space thermal radiation effect is effectively reduced, and the on-rail accuracy of the reflection film surface is improved; and by employing a honeycomb structure, and the weight of the antenna also can be effectively reduced.

Application Domain

Collapsable antennas means

Technology Topic

Central cylinderSatellite +11

Image

  • Automatic-resilient, reconfigurable, satellite-borne and expandable antenna
  • Automatic-resilient, reconfigurable, satellite-borne and expandable antenna
  • Automatic-resilient, reconfigurable, satellite-borne and expandable antenna

Examples

  • Experimental program(1)

Example Embodiment

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0020] The application principle of the present invention will be described in detail below with reference to the accompanying drawings.
[0021] like figure 1 As shown, the self-resilient reconfigurable spaceborne deployable antenna provided by the embodiment of the present invention includes: a central wheel barrel 1 , a variable-volume parabolic radiation rib 2 , and a thin-film reflecting surface 3 .
[0022] The variable-volume parabolic radiating rib 2 is wound around the central drum 1, and the film reflective surface 3 is closed between the variable-volume parabolic radiating ribs 2 in the winding state in an annular concave-convex shape.
[0023] The variable volume parabolic radiating rib 2 is designed and manufactured with three-way shape memory polymer material, and the film reflective surface 3 is divided into three layers, such as figure 2 As shown, it includes a metal reflective layer 3-1, a film layer 3-2, and a shape memory actuator layer 3-3. The metal reflective layer 3-1 and the film layer 3-2 use the film surface coated with the metal reflective layer to form a paraboloid once by thermoplastic hot pressing; the shape memory actuator layer 3-3 is printed on the back of the film reflective surface 3. The shape memory actuator layer structure type is as follows image 3 shown.
[0024] The working principle of the present invention:
[0025] After the variable-volume parabolic radiating rib is energized and heated up at one time, it gradually unfolds, and the film reflecting surface is gradually rotated and unfolded under the traction of the six variable-volume parabolic radiating ribs; Variant The secondary variant of the parabolic radiating rib, along the width direction, that is, the overall antenna is axially folded into a corrugated plate shape, which increases the flexural rigidity of the variable-body parabolic radiating rib. The metal reflective layer and the film layer of the film reflective surface are formed by using the film surface coated with the metal reflective layer to form a paraboloid at one time by thermoplastic hot pressing, and the precision reaches the target precision of 50μm. Then, the formed film is placed on a high-precision substrate, and the shape memory actuator layer is printed on the back of the film by an integrated injection molding manufacturing method. The shape memory actuator layer adopts a honeycomb structure, and each honeycomb is connected by a shape memory hinge. The thermal deformation trend of the shape memory hinge and the membrane surface under the action of thermal radiation in space cancels each other, thereby effectively reducing the thermal radiation of the membrane surface in space. Under the action of thermal deformation, the purpose of improving the orbital shape of the film surface is achieved.
[0026] The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

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