Vehicle Radar Antenna Layout With Metasurfaces for Wider Coverage
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Solution Overview
Problem
Current radar systems for motor vehicles face challenges in increasing peripheral detection volume and spatial resolution while minimizing cost and energy consumption, particularly in autonomous and electric vehicles, due to the limitations of multiple radar units and their interference, as well as the need for precise positioning to maintain functionality amidst bodywork deformations.
Innovation Solution
A radar system comprising directional antennas with metasurfaces and waveguides, operating in a high frequency range (e.g., 77 GHz) and strategically arranged on a bodywork part made of plastic, with a configuration that allows for efficient electromagnetic wave emission and reception, optimizing detection cones and reducing interference and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the number of radars is increased to improve peripheral detection volume, then the detection coverage is improved, but the cost and energy consumption increase
Solution Approach 1:
The patent combines multiple radar functions (transmission and reception) into a single integrated radar unit. The radar system includes a transmitter that emits electromagnetic waves and multiple receivers that detect reflected waves from different directions, allowing the single unit to perform the detection functions of multiple separate radars, thereby reducing energy consumption and cost while maintaining comprehensive peripheral detection coverage.
2Volume of moving object
If the number of radars is increased to improve peripheral detection volume, then the detection coverage is improved, but the device complexity increases
Solution Approach 1:
The patent integrates multiple receiver antennas and processing functions into a single radar device. The system includes a transmitter and multiple receivers that can be arranged in different spatial configurations, allowing one integrated unit to replace multiple separate radar devices while reducing overall system complexity and the need for multiple radiofrequency tracks.
Solution Approach 2:
The radar system is designed with multi-functional capabilities, where a single radar unit can perform both transmission and multiple reception functions simultaneously. The receivers can detect electromagnetic waves from different directions and distances, enabling the single device to fulfill the roles of multiple specialized radar units for various detection purposes.
3Area of moving object
If radars are miniaturized to fit limited surface area, then the available installation space is reduced, but the spatial resolution decreases
Solution Approach 1:
The patent utilizes three-dimensional spatial arrangement of receiver antennas around the vehicle bodywork, extending detection capabilities beyond a single plane. By positioning receivers at different locations and orientations on the vehicle surface, the system achieves comprehensive spatial coverage and maintains high resolution detection without requiring increased surface area for each individual radar unit.
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 enhances the detection of objects and persons around the vehicle with improved spatial resolution and reduced energy consumption, facilitating the implementation of radar systems in autonomous vehicles by optimizing antenna placement and frequency usage, thereby improving detection precision and range without increasing costs or energy consumption.
Implementation Method 1
a first directional antenna (300a) comprising a first reflective cavity (400a) reflecting electromagnetic waves wherein a first metasurface (500a) is positioned
Implementation Method 2
a first metasurface (500a) is positioned, said first antenna being configured to be connected to the electronic unit via a first waveguide
Implementation Method 3
said first antenna being configured to be connected to the electronic unit via a first waveguide and to transmit an electromagnetic wave, emitted by the electronic unit and propagated via the first waveguide
Implementation Method 4
a radar system for a motor vehicle comprising: an electronic unit (900) configured to transmit and receive an electromagnetic wave
Data Source
AI summary
Radar system (200) for a motor vehicle includes an electronic unit (900) configured to transmit and receive an electromagnetic wave in a predetermined frequency range, a first directional antenna (300a) comprising a first reflective cavity (400a) reflecting electromagnetic waves, in which a first metasurface (500a) is positioned, a second directional antenna (300b) comprising a second reflective cavity (400b) reflecting electromagnetic waves, in which a second metasurface (500b) is positioned.