Radar Cover Curved Surface Azimuth Detection
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Solution Overview
Problem
Existing radar apparatuses face challenges in accurately detecting azimuth directions over a wide angular range due to low phase differences between incoming waves received by antenna elements at large angular values.
Innovation Solution
A radar apparatus with a cover member having non-parallel first and second faces, where at least one face is curved along azimuth detection directions, refracting incoming waves to increase phase differences between antenna elements, thereby enhancing direction detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional radar apparatus uses a planar cover member, then the structure is simple and easy to manufacture, but the phase difference between incoming waves received by antenna elements becomes small at large angular values, reducing azimuth detection accuracy
Solution Approach 1:
The cover member is designed with curved surfaces instead of planar surfaces. Specifically, the first face and second face are formed with curved surfaces that have specific radii of curvature, which refract incoming waves to increase the phase difference between antenna elements at large angular values, thereby improving azimuth detection accuracy
Solution Approach 2:
The radii of curvature of the curved surfaces on the cover member are specifically designed to satisfy certain mathematical relationships. By changing the curvature parameters (radii of curvature) of the cover member surfaces, the phase difference characteristics are optimized to maintain high azimuth detection accuracy across a wide angular range
2Measurement precision
If the cover member uses curved surfaces to increase phase difference, then azimuth detection accuracy improves, but manufacturing complexity increases
Solution Approach 1:
The curved surfaces are designed with specific radii of curvature that can be precisely controlled during manufacturing. The mathematical relationships between these radii are established to achieve the desired phase difference characteristics while maintaining manufacturability through standard curved surface fabrication techniques
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 solution improves the accuracy of azimuth direction detection over a wide angular range by increasing phase differences between incoming waves received by the antenna elements, leading to enhanced detection capabilities.
Implementation Method 1
incoming waves which are reflected waves that have been transmitted from the transmitting means and reflected by a target, are refracted at the second face and the first face of the cover member
Data Source
AI summary
A radar apparatus is provided with transmitting means, receiving means, target detection means, azimuth detection means and a cover member. The cover member has a first face and a second face. The first face and second face are not parallel to one another. At least one of the first face and second face is a curved surface which is curved along azimuth detection directions of the azimuth detection means, such as to provide a large phase difference between incoming waves that are received by a plurality of antenna elements and are from within a range of large angular values in the azimuth detection directions of the azimuth detection means.