Reflector-Shaped Antenna for Corridor-Aligned Object Detection
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Solution Overview
Problem
Existing antenna devices for detecting object movement in the automotive field face challenges in achieving accurate detection due to the need for specific conditions and the presence of external noise, which affects the reliability and sensitivity of sensors.
Innovation Solution
An improved antenna device with a reflector configured to spatially narrow electromagnetic waves in the vertical direction and widen them in the horizontal direction, mounted on a substrate, allowing for adjustable detection corridors and reduced external noise by eliminating gaps between the reflector and substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reflector is used to narrow electromagnetic waves in the vertical direction, then detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The reflector is designed with a curved surface having different radii of curvature in orthogonal directions. The first radius of curvature (R1) in the vertical direction is smaller than the second radius of curvature (R2) in the horizontal direction, creating an elliptical or cylindrical curvature profile. This curvature configuration focuses electromagnetic waves in the vertical direction to improve detection accuracy while maintaining a relatively simple single-piece structure that avoids complex multi-component assemblies.
2Reliability
If the reflector is mounted on the substrate, then external noise is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The reflector is integrated directly with the substrate as a single unified structure, eliminating the need for separate mounting operations. The reflector appears to be formed as an integral part of the substrate or firmly bonded thereto, which reduces external noise by eliminating gaps between separate components while avoiding the manufacturing precision issues associated with separate mounting processes.
3Adaptability or versatility
If the reflector geometry is adjusted for specific corridors, then adaptability is improved, but the device complexity increases
Solution Approach 1:
The reflector's geometric parameters, specifically the radii of curvature (R1 and R2), are varied to create different beam spreading characteristics. By adjusting these curvature parameters, the antenna device can be adapted to different corridor geometries and detection requirements. This parameter adjustment approach provides versatility for different applications while maintaining a simple single-piece reflector structure that avoids increasing overall device complexity.
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
This configuration enhances detection accuracy by adjusting the spread of electromagnetic waves to match specific vehicle corridors, reducing misdetections and improving sensor reliability and usability.
Implementation Method 1
a reflector (104) configured for reflecting the electromagnetic waves emitted from the antenna element (102)
Data Source
AI summary
An antenna device (100) includes an antenna element (102) for emitting and receiving electromagnetic waves, a reflector (104) for reflecting the electromagnetic waves emitted from the antenna element (102), and a substrate (106) on which the antenna element (102) and the reflector (104) are positioned. The substrate (106) defines a main extension plane (108) extending along a horizontal direction (Y) and a lateral direction (X), wherein a vertical direction (Z) extends perpendicular to the horizontal direction (Y) and the lateral direction (X), and thus perpendicular to the main extension plane (108). The reflector (104) has a concave shape (112) in the vertical direction (Z) thereby spatially narrowing in the vertical direction (Z) the electromagnetic waves emitted by the antenna element (102), and has a convex shape (110) in the horizontal direction (Y) thereby spatially widening in the horizontal direction (Y) the electromagnetic waves emitted by the antenna element (102).