Deployable Space Antenna Structure With Degradable Support Layer
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Solution Overview
Problem
Space structures, such as antennas, face challenges in deployment due to material limitations and environmental conditions in space, leading to size and strength constraints that compromise beam patterns and deployment mechanisms.
Innovation Solution
A satellite base structure with a degradable layer that can withstand deployment forces and degrade in space environments, allowing for transition from a stored to a deployed configuration, and potentially reducing mass post-deployment, while using shape memory composite materials and support structures for flexibility and conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rigid metal antennas are used for space deployment, then structural strength and reliability are improved, but size and mass increase exponentially, compromising launch logistics and satellite payload capacity
Solution Approach 1:
The patent employs thin-film flexible antenna structures that can be folded or rolled into compact configurations for launch, then deployed to full size in space. The flexible substrate and conductive patterns maintain electrical functionality while enabling drastic mass and volume reduction compared to rigid metal antennas.
Solution Approach 2:
The antenna structure is designed to be folded or rolled into a nested compact form factor that fits within the limited satellite payload volume. The conductive traces and substrate are arranged to allow multi-layer nesting while maintaining structural integrity and electrical connectivity during stowed configuration.
2Weight of stationary object
If antenna size is reduced to fit within satellite constraints, then launch logistics are improved, but beam pattern performance is compromised or narrowed
Solution Approach 1:
The flexible antenna design allows the radiating elements to achieve optimal geometric configurations for desired beam patterns while maintaining a compact stowed form. The thin-film substrate enables precise control of element spacing and orientation to preserve radiation characteristics despite reduced overall size.
Solution Approach 2:
The patent utilizes three-dimensional folding and rolling configurations that pack the antenna elements efficiently in compact volumes while maintaining the two-dimensional radiating aperture geometry necessary for proper beam patterns. The deployment mechanism transitions from compact 3D storage to extended 2D operational configuration.
3Volume of moving object
If deployable configurations are implemented for conventional antennas, then stowability during launch is improved, but material construction limitations and deployment complexity increase
Solution Approach 1:
The flexible antenna structure inherently provides its own deployment mechanism through elastic recovery or simple mechanical actuation, eliminating the need for complex rigid mechanical deployment systems. The flexible substrate and conductive traces are arranged to allow passive or active deployment while maintaining structural integrity.
Solution Approach 2:
The antenna structure transitions dynamically between stowed and deployed configurations using flexible joints, hinges, or elastic recovery mechanisms. The design allows the structure to adapt its geometry during deployment while maintaining electrical functionality throughout the transition, reducing the need for complex locking or positioning mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient deployment and reduced mass of space structures by utilizing degradable layers and shape memory composites to maintain structural integrity during deployment and minimize post-deployment interference, while maintaining antenna performance.
Implementation Method 1
The degradable layer may comprise a layer degradable in outer space, such as in contact with atomic oxygen and/or radiation
Implementation Method 2
The degradable layer may comprise a layer degradable in outer space, such as in contact with atomic oxygen and/or radiation
Implementation Method 3
Exemplary embodiments may include a shape memory composite material. The shape memory composite material may include a conductive material to act as an antenna
Data Source
AI summary
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.