Compactable structures for deployment in space
Systems and methods described herein include collapsible and deployable antenna structures. The antenna structures may include any combination of shape memory composites, inflatable envelopes, and/or degradable materials.
1. An antenna, comprising: a base structure comprising a shape memory material for supporting the antenna; a conductive material as part of the base structure, the conductive material creating an antenna form geometry; a degradable material contacting the base structure, the degradable material degradable by a presence of atomic oxygen or solar radiation; and a support structure for assisting in a deployment of the antenna, wherein the support structure comprises a flexible thin film configured to create a dielectric membrane, wherein the antenna comprises a stored configuration configured to fit within a reduced volume and a deployed configuration configured to fit within an increased volume, wherein the increased volume is greater than the reduced volume.
2. The antenna of claim 1 , wherein the base structure comprises a shape memory composite.
3. The antenna of claim 2 , wherein the antenna form geometry is an omnidirectional antenna for free space communications between ground stations and spacecraft or between spacecraft.
4. The antenna of claim 2 , wherein the antenna form geometry is a quadrifilar helical antenna or a biconical antenna.
5. The antenna of claim 4 , wherein the support structure defines an envelope creating an interior cavity, wherein the envelope creates a gas semi-impermeable surface around the interior cavity.
6. The antenna of claim 5 , further comprising an inflation system to supply a material to the interior cavity and inflate the envelope.
7. The antenna of claim 6 , further comprising a vent configured to release the material from the interior cavity after inflation of the envelope.
8. The antenna of claim 7 , wherein the conductive material is positioned on a surface of the base structure.
9. The antenna of claim 8 , wherein the base structure, support structure, and conductive material are each dynamically deformable to permit the antenna to be configured in the stored configuration and transition to the deployed configuration.
10. The antenna of claim 9 , wherein the support structure is coupled to the base structure such that inflation of the envelope positions the base structure in a desired configuration.
11. The antenna of claim 10 , wherein the support structure is configured to degrade over 1 to 5 days in the presence of atomic oxygen or solar radiation.
12. The antenna of claim 10 , further comprising a degradable layer over at least a portion of the conductive material.
13. The antenna of claim 12 , further comprising a housing configured to apply a force on the base structure to maintain the base structure in the stored configuration.
14. An antenna, comprising:
a base structure comprising a shape memory material for supporting the antenna;
a conductive material as part of the base structure, the conductive material creating an antenna form geometry;
a degradable material contacting the base structure, the degradable material degradable by a presence of atomic oxygen or solar radiation; and
a support structure for assisting in the deployment of the antenna, wherein the support structure creates an envelope defining an interior cavity and creates a gas semi-impermeable surface around the interior cavity,
wherein the antenna comprises a stored configuration configured to fit within a reduced volume and a deployed configuration configured to fit within an increased volume, wherein the increased volume is greater than the reduced volume.
15. The antenna of claim 14 , wherein the base structure comprises a shape memory composite.
16. The antenna of claim 14 , further comprising an inflation system to supply a material to the interior cavity and inflate the envelope.
17. The antenna of claim 16 , further comprising a vent configured to release the material from the interior cavity after inflation of the envelope.
18. The antenna of claim 14 , wherein the conductive material is positioned on a surface of the base structure.
19. The antenna of claim 14 , wherein the base structure, support structure, and conductive material are each dynamically deformable to permit the antenna to be configured in the stored configuration and transition to the deployed configuration.
20. The antenna of claim 14 , wherein the support structure is coupled to the base structure such that inflation of the envelope positions the base structure in a desired configuration.