Reconfigurable MIMO Antenna for CubeSat Swarm Adaptability
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Solution Overview
Problem
Current methods for commanding and configuring CubeSats, particularly in swarms for remote sensing and global reconnaissance, are inadequate due to the need for real-time adjustment of antenna properties to optimize communication capacity and gain in dynamic propagation environments.
Innovation Solution
The development of reconfigurable multiple-input-multiple-output (MIMO) antenna devices with alternating straight-fed and bent-fed patch elements on connected substrates, allowing for adjustable inter-element spacing using a scissor-lift actuator framework, enabling real-time variation of channel capacity and gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed antenna elements are used in CubeSats, then device complexity is reduced, but adaptability to dynamic propagation environments deteriorates
Solution Approach 1:
The patent implements a reconfigurable MIMO antenna system where the inter-element spacing can be dynamically adjusted using a scissor-lift actuator mechanism. This allows the antenna to adapt its configuration in real-time to optimize performance for different propagation environments, directly resolving the contradiction between fixed simplicity and dynamic adaptability.
Solution Approach 2:
The patent changes the physical parameter of inter-element spacing to achieve adaptability. By varying the distance between antenna elements through mechanical actuation, the system can optimize its radiation patterns and channel capacity for different propagation conditions, thereby improving adaptability without requiring complete system redesign.
2Productivity
If inter-element spacing is increased to optimize channel capacity, then communication capacity improves, but antenna device volume increases
Solution Approach 1:
The scissor-lift actuator enables dynamic adjustment of inter-element spacing, allowing the antenna to expand to larger separations when high channel capacity is needed and contract to smaller volumes when size constraints are critical. This dynamic capability resolves the contradiction between maximizing productivity and minimizing volume.
Solution Approach 2:
The scissor-lift mechanism allows the antenna elements to be nested closely together when not in use, minimizing the overall device volume. When channel capacity optimization is required, the elements can be extended outward to achieve larger inter-element spacing, effectively nesting the expanded configuration within a compact form factor.
Data Source
AI summary
Multiple-input-multiple-output (MIMO) antenna devices and methods of using and fabricating the same are provided. A MIMO antenna device can include a plurality of substrates each having an antenna element. The substrates can be provided in connected series and can be attached to a framework. The substrates can have alternating style antenna elements, such that a first substrate can have a straight-fed patch and a second substrate adjacent to the first substrate can have a bent-fed patch and a third substrate adjacent to the second substrate, and on an opposite side of the second substrate than the first substrate is, can have a straight-fed patch and so on.