Slot Antenna Structure for Wide-Angle Radar With Reduced Angle Error
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Solution Overview
Problem
Current vehicle radar antennas struggle to meet both wide-angle and wide-band characteristics, which are essential for accurate object detection and autonomous driving, leading to inaccuracies in angle measurement.
Innovation Solution
An antenna structure with a conductive upper layer and a conductive lower layer, featuring adjacent slot patterns and protruding waveguides, which enhance angular resolution by mitigating angle errors and improving gain deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional antenna designs are used, then either wide-angle or wide-band characteristics can be achieved, but not both simultaneously
Solution Approach 1:
The antenna is divided into multiple independent slot elements (first slot, second slot, third slot, fourth slot) arranged in a specific geometric pattern. Each slot can be independently optimized for different frequency bands while collectively providing wide-angle coverage. The segmentation allows each element to contribute to different aspects of the performance requirements.
Solution Approach 2:
The antenna employs asymmetric slot configurations where slots of different lengths and orientations are positioned at specific locations. The first and second slots have different dimensions from the third and fourth slots, creating asymmetric radiation patterns that when combined provide both wide-angle and wide-band characteristics. This asymmetry enables independent optimization of different frequency responses.
2Measurement precision
If commercially available vehicle antennas are used, then manufacturing simplicity is maintained, but angle measurement accuracy deteriorates
Solution Approach 1:
Multiple slot elements are merged into a single integrated antenna structure that functions as one unified device. The first, second, third, and fourth slots are combined in a specific geometric arrangement to achieve wide-angle and wide-band characteristics simultaneously. This merging approach provides enhanced angle detection accuracy while maintaining a relatively simple overall structure that can be manufactured using conventional techniques.
3Adaptability or versatility
If single-slot antenna patterns are used, then manufacturing complexity is reduced, but angular resolution and gain deviation performance deteriorate
Solution Approach 1:
The multi-slot antenna structure serves multiple functions simultaneously: it provides wide-angle coverage, achieves wide-band operation, and delivers high angular resolution. The same geometric arrangement of slots that provides wide-angle characteristics also enables precise angle detection and maintains gain deviation performance across different frequency bands, making the structure universally applicable for advanced vehicle radar systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The structure achieves both wide-angle and wide-band characteristics, reducing angle errors and enhancing the accuracy of object detection, thereby supporting advanced vehicle radar systems.
Implementation Method 1
a waveguide connected to the feeding hole and disposed on the feeding hole, and tightly contacting between the printed circuit board and the conductive upper layer
Implementation Method 2
an antenna slot pattern connected with the feeding pad through a waveguide and vertically opened to radiate or receive the RF signal
Data Source
AI summary
According to an embodiment, an antenna structure comprises a printed circuit board including an integrated circuit processing a radio frequency (RF) signal, a feeding line connected to the integrated circuit, and a feeding pad connected to the feeding line to transfer the RF signal and a conductive upper layer including an antenna slot pattern connected with the feeding pad through a waveguide and vertically opened to radiate or receive the RF signal. The conductive upper layer further includes an adjacent slot pattern around the antenna slot pattern.