Antenna Device Virtual Arrays Angular Resolution
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Solution Overview
Problem
Existing antenna devices require separate configurations for detecting objects at narrow and wide angles, leading to device enlargement and complexity.
Innovation Solution
An antenna device with multiple transmission antennas and reception antennas arranged at specific distances and widths, forming virtual arrays with different reception antenna distances, allowing for efficient detection of objects at various angles with a simple configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate antenna configurations are used for detecting objects at narrow and wide angles, then detection accuracy for different angles is improved, but device size and complexity increase
Solution Approach 1:
The patent combines multiple transmission antennas and reception antennas into a single integrated array configuration. The transmission antennas are arranged at a reference distance, and reception antennas with different aperture widths are positioned at specific distances to simultaneously achieve narrow-angle and wide-angle detection capabilities without requiring separate antenna systems.
Solution Approach 2:
The antenna array is designed to perform multiple functions: it can detect objects at both narrow angles and wide angles using the same physical structure. By adjusting the aperture widths and positions of reception antennas, the system achieves versatile detection capabilities across different angular ranges without needing separate specialized configurations.
2Measurement precision
If separate antenna configurations are used for detecting objects at narrow and wide angles, then detection accuracy for different angles is improved, but device size increases
Solution Approach 1:
The patent utilizes the aperture width dimension as an additional degree of freedom to achieve different detection angles. Instead of expanding the device area with separate antenna arrays, it varies the aperture widths of reception antennas within the same physical footprint, enabling narrow-angle and wide-angle detection without increasing the overall device area.
Solution Approach 2:
Different reception antennas are assigned different aperture widths tailored to specific detection requirements. Some reception antennas have larger apertures for wide-angle detection while others have smaller apertures for narrow-angle detection, optimizing local characteristics to achieve global detection coverage without expanding device size.
Data Source
AI summary
Transmission antennas are aligned at a reference distance along a preset direction of alignment. The aperture width of a first reception antenna in the direction of alignment is set to a first width which is less than the reference distance. Second reception antennas each have an aperture width in the direction of alignment set to a second width which is the first width or less and are aligned at a distance which is less than the reference distance along the direction of alignment. The distance between the position of the center of the first reception antenna and the phase center of a second reception antennal located closest to the first reception antenna among the second reception antennas is set to a length that is greater than or equal to the value obtained by multiplying the reference distance by the value obtained by subtracting 1 from the number of transmission antennas.