Rotatable Rack Antenna Array for Inverse Synthetic Aperture Radar
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Solution Overview
Problem
Inverse synthetic aperture radars are limited by the complexity and size of existing antenna arrays, making them difficult to use and operate, especially in generating imagery through opaque surfaces or in adverse weather conditions.
Innovation Solution
An antenna array with a plurality of racks, each configured with adjustable antenna elements that can be rotated relative to each other, allowing for customizable azimuthal and elevational orientations, reducing complexity and size while maintaining ease of use and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed orientation antenna array is used, then the structure is simpler, but the adaptability to different imaging conditions is reduced
Solution Approach 1:
The patent implements adjustable racks that allow antenna elements to be repositioned between fixed orientations (0°, 45°, 90°, 135°) to adapt to different imaging conditions. This dynamic reconfiguration capability enables the system to switch between various scan patterns and coverage areas without requiring a completely different antenna array design, thus improving adaptability while maintaining manageable complexity through discrete positioning options.
Solution Approach 2:
The antenna array is divided into multiple independent racks, each containing specific antenna elements oriented at different angles. This segmentation allows individual racks to be adjusted independently to optimize imaging for different conditions, while the modular structure keeps the overall system complexity manageable through standardized reusable components.
2Ease of operation
If manually adjustable antenna elements are implemented, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent provides manually adjustable racks that enable operators to reposition antenna elements between predetermined fixed orientations. This dynamic adjustment capability improves ease of operation by allowing direct manual control, while the limitation to discrete fixed positions (0°, 45°, 90°, 135°) prevents the system from becoming overly complex by avoiding continuous adjustment mechanisms.
3Adaptability or versatility
If racks are rotated relative to each other, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent implements racks that can be rotated relative to each other to create different scan patterns and coverage areas. This dynamic reconfiguration capability significantly improves adaptability to various imaging conditions. The complexity is managed by providing fixed rotational positions rather than continuous adjustment, allowing operators to select from predetermined orientations that optimize different imaging scenarios.
Solution Approach 2:
The antenna array is segmented into multiple independently rotatable racks, each contributing to the overall scan pattern. This segmentation allows flexible combination of different rack orientations to create customized imaging patterns, while the modular design keeps the rotation mechanism complexity manageable through standardized interfaces and components.
Data Source
AI summary
According to one embodiment, an antenna array includes a plurality of racks that are each configured with a plurality of antenna elements. Each rack may be rotated relative to the other racks through an axis that is generally parallel to the axis of other racks. Each antenna element within each rack has an axial orientation that is generally similar to and has an elevational orientation that is individually adjustable relative to one another.