Radar Cover Thickness Profiling to Minimize Beam Refraction
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Solution Overview
Problem
The refraction of radar radio waves due to the curved shape of vehicle front parts, such as the radiator grille, affects the uniform transmission and reception of radar waves, leading to reduced detection accuracy.
Innovation Solution
A cover device with a cover part that has an incidence section gradually increasing in thickness away from the central axis of the radar beam, designed to minimize phase differences caused by refraction, using layers with different dielectric permittivities and a mesh layer to optimize radio wave penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a curved shape is used for the vehicle front part (radiator grille), then the external feature and aerodynamic performance are improved, but refraction of radar radio waves occurs leading to reduced detection accuracy
Solution Approach 1:
The cover part is designed with non-uniform thickness distribution, where the thickness varies in the direction away from the central axis of radio waves. This local variation in geometric property compensates for the refraction caused by the curved vehicle front shape, allowing different regions of the cover to serve different functional purposes while maintaining overall aesthetic appearance.
Solution Approach 2:
The cover part is constructed using composite material structure consisting of multiple layers with different dielectric permittivities. This composite structure enables control over radio wave propagation characteristics, allowing the cover to maintain its external shape while minimizing refraction effects through careful selection and arrangement of materials with complementary electromagnetic properties.
2Ease of manufacture
If a cover part with uniform thickness is used, then manufacturing is simplified, but phase difference due to refraction increases reducing radar detection accuracy
Solution Approach 1:
The cover part is designed with non-uniform thickness distribution, where the thickness varies in the direction away from the central axis of radio waves. This local variation in geometric property compensates for the refraction caused by the curved vehicle front shape, allowing different regions of the cover to serve different functional purposes while maintaining overall aesthetic appearance.
Solution Approach 2:
The thickness parameter of the cover part is deliberately varied as a function of position relative to the central axis. By changing this geometric parameter systematically, the design compensates for refraction effects without requiring complex multi-component assemblies, thus balancing manufacturing feasibility with performance requirements.
3Measurement precision
If layers with different dielectric permittivities are used, then refraction compensation is improved, but device complexity increases
Solution Approach 1:
The cover part is constructed using composite material structure consisting of multiple layers with different dielectric permittivities. This composite structure enables control over radio wave propagation characteristics, allowing the cover to maintain its external shape while minimizing refraction effects through careful selection and arrangement of materials with complementary electromagnetic properties.
Solution Approach 2:
The cover part is divided into multiple layers, each potentially serving different functional purposes. This segmentation allows independent optimization of each layer's properties while maintaining overall system performance, and facilitates modular manufacturing and assembly processes.
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 cover device effectively reduces refraction and penetration loss of radar radio waves, thereby improving detection accuracy and maintaining the external shape of the vehicle.
Implementation Method 1
a cover part disposed to allow the radio waves to be incident from the radio wave generator and having an incidence section configured to be gradually increased in thicknesses in directions away from a central axis of the radio waves
Implementation Method 2
the incidence section of the cover part may be configured such that the thicknesses thereof are determined in the directions away from the central axis of the radio waves, according to relative dielectric permittivity determined by a material of the cover part and an incidence angle of the radio waves
Data Source
AI summary
A cover device for reducing refraction of radar radio waves includes a radio wave generator configured to generate radio waves, and a cover part disposed to allow the radio waves to be incident from the radio wave generator and having an incidence section configured to be gradually increased in thicknesses in directions away from a central axis of the radio waves, thereby improving a detection accuracy through a radar by minimizing a phase difference due to refraction of a beam emitted from the radar.