Vehicle Radar Antenna Polarization Separation for Angle Detection
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Solution Overview
Problem
Conventional vehicle-mounted radar antennas face difficulties in accurately detecting the position of obstacles due to their complex configurations and inability to independently grasp polarization components in multiple directions, particularly the Z-axis direction, which hinders precise estimation of azimuth and elevation angles.
Innovation Solution
A moving object mounted radar antenna system with a simple configuration, featuring an antenna substrate with separate first and second antenna elements that receive polarization components in parallel and perpendicular directions, respectively, and a separation portion to electrically isolate them, allowing for independent processing of these components to estimate the position of obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an array antenna with multiple antenna elements is used to detect azimuth angle, then measurement precision of obstacle position is improved, but device complexity increases
Solution Approach 1:
The antenna is divided into two distinct antenna elements with different polarization directions. The first antenna element receives polarization components in a first direction, while the second antenna element receives polarization components in a second direction perpendicular to the first. This segmentation allows each element to be optimized for specific polarization reception, achieving accurate position detection without requiring a complex array antenna configuration.
2Adaptability or versatility
If multiple antenna elements are arranged to detect wide range obstacles, then adaptability of detection coverage is improved, but device complexity increases
Solution Approach 1:
Each antenna element is designed with specific local quality characteristics - the first antenna element is optimized for receiving polarization components in the first direction, while the second antenna element is optimized for the second direction. This local quality differentiation allows the antenna system to achieve wide-range detection capability through polarization diversity rather than through complex spatial arrangement of multiple elements.
3Ease of manufacture
If conventional radar antenna configuration is used, then manufacturing simplicity is maintained, but measurement precision of obstacle position deteriorates
Solution Approach 1:
The antenna is segmented into two independent antenna elements with distinct polarization reception capabilities. This segmentation enables accurate azimuth and elevation angle detection by processing signals from both elements, while maintaining manufacturing simplicity because each element can be designed and fabricated using conventional techniques without requiring complex array structures.
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
Enables accurate detection of azimuth and elevation angles with a simplified configuration, reducing processing load and expanding the viewing angle of the radar antenna.
Implementation Method 1
a first antenna element that is allowed to receive a polarization component in a first polarization direction parallel to the main flat surface
Implementation Method 2
a second antenna element that is allowed to receive a polarization component in a second polarization direction perpendicular to the main flat surface
Data Source
AI summary
Provided is a moving object mounted radar antenna including an antenna substrate that includes a main flat surface facing an object, a first antenna element that is allowed to receive a polarization component in a first polarization direction parallel to the main flat surface, a second antenna element that is allowed to receive a polarization component in a second polarization direction perpendicular to the main flat surface, and a separation portion that electrically separates the first antenna element and the second antenna element. Each of the first antenna element, the second antenna element, and the separation portion being provided on the antenna substrate.