Zoomable Array-Fed Reflector Antenna for Beam Reconfiguration
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Solution Overview
Problem
AFR antennas lack flexibility to adapt to dynamically changing mission requirements, as their static configurations are not suitable for varying power needs and beamforming complexities, limiting their effectiveness in different applications.
Innovation Solution
A zoomable AFR antenna assembly with a telescopic arm mechanism that moves the reflector relative to the feed array, allowing for reconfiguration between fully focused, defocused, and partially defocused configurations, along with a control system for optimizing the reflector's shape based on mission requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a static AFR antenna configuration is used, then the structure is simple and reliable, but it cannot adapt to dynamically changing mission requirements
Solution Approach 1:
The patent applies the dynamics principle by making the reflector position adjustable relative to the feed array through a telescopic arm mechanism. This allows the antenna to transition between focused and defocused configurations dynamically, enabling adaptation to different mission requirements such as power pooling and beamforming complexity without changing the physical antenna structure.
Solution Approach 2:
The patent changes the key parameter of reflector-to-feed-array distance to achieve different operational modes. By adjusting this distance parameter, the antenna can operate in fully focused, partially defocused, or fully defocused modes, thereby changing its beamforming characteristics and power distribution without modifying the antenna components themselves.
2Adaptability or versatility
If the reflector position is fixed relative to the feed array, then the antenna structure is stable, but it cannot reconfigure for different beamforming requirements
Solution Approach 1:
The telescopic arm mechanism provides controlled dynamic adjustment of the reflector position while maintaining structural stability during operation. The mechanism allows intentional position changes for reconfiguration while providing stable positioning at each configured state, resolving the contradiction between stability and reconfigurability.
3Adaptability or versatility
If a zoomable reflector mechanism is added to enable reconfiguration, then adaptability to different mission requirements is improved, but the device complexity increases
Solution Approach 1:
The telescopic arm provides a relatively simple mechanical dynamic adjustment mechanism compared to alternative reconfiguration approaches. It enables in-orbit flexibility for changing between focused and defocused modes while maintaining reasonable structural simplicity, making it suitable for satellite applications where mass and complexity are critical constraints.
Data Source
AI summary
An Array-Fed Reflector (AFR) antenna assembly is provided comprising an AFR antenna comprising a feed array a reflector, and a mechanism for moving a position of the reflector relative to a position of the feed array such that a focal region of the reflector is movable with respect to the position of the feed array.