Multi-mode Radar Antenna Segmented Arrays
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Solution Overview
Problem
Current radar antenna designs for vehicles lack the capability to efficiently operate in both steerable and imaging modes simultaneously, limiting their effectiveness in detecting and localizing objects at varying ranges and angles, especially in complex scenarios like highway intersections.
Innovation Solution
A multi-mode radar antenna design featuring distinct sets of transmitting antennas for steerable and imaging modes, with specific spacings and configurations to achieve high angular resolution and wide field of view, combined with a receiving antenna section for comprehensive signal reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single radar antenna is used for both steerable and imaging modes, then device complexity is reduced, but measurement precision and angular resolution deteriorate
Solution Approach 1:
The transmitting antenna section is segmented into three distinct groups: a first plurality for steerable mode, a second plurality for imaging mode, and a third plurality for both modes. Each group has specific spacing configurations (1.5λ for steerable, 0.5λ for imaging) optimized for its function, allowing simultaneous operation with high angular resolution without requiring multiple separate radar units
Solution Approach 2:
The third plurality of transmitting antennas serves dual functionality by being configured to transmit both imaging mode signals and steerable mode signals. This multi-functional design allows a single antenna system to perform both imaging and steerable operations, reducing the total number of radars needed while maintaining measurement precision through proper signal separation and processing
2Reliability
If antenna elements are spaced at 1.5λ for steerable mode, then long-range detection capability is improved, but wide field of view for imaging is limited
Solution Approach 1:
Different regions of the transmitting antenna section have different spacing characteristics optimized for their specific function: the first and third pluralities use 1.5λ spacing for long-range steerable detection, while the second plurality uses 0.5λ spacing for wide-field imaging. This local optimization allows each region to excel at its designated task
Solution Approach 2:
The antenna system operates in both azimuth and elevation dimensions with multiple rows and columns of antennas. The vertical spacing of 0.5λ between rows provides wide field of view in elevation for imaging, while the horizontal 1.5λ spacing maintains long-range detection capability in azimuth for steerable mode
3Adaptability or versatility
If multiple transmitting antenna groups with different spacings are used, then operational flexibility is improved, but device complexity increases
Solution Approach 1:
Three different antenna groups with different spacing configurations are merged into a single integrated transmitting antenna section. The first plurality (1.5λ spacing), second plurality (0.5λ spacing), and third plurality (dual-mode) work together as one unified system, controlled by a single radar device, reducing operational complexity compared to using separate radar units for each mode
Data Source
AI summary
A multi-mode radar antenna apparatus is provided. The apparatus includes a transmitting antenna section comprising a first plurality of transmitting antennas configured to a transmit a steerable mode signal, a second plurality of transmitting antennas configured to a transmit an imaging mode signal, and a third plurality of transmitting antennas configured to a transmit an imaging mode signal and a steerable mode signal, and a receiving antenna section comprising a plurality of receiving antennas.