Vehicle Radar Antenna Layout With Metasurfaces for Wider Peripheral Sensing
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Solution Overview
Problem
Current radar systems in 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, energy consumption, and the need for precise positioning amidst deformation of body parts.
Innovation Solution
A radar system comprising two directional antennas with metasurfaces positioned on adjacent body parts, operating in a high frequency range (e.g., 77 GHz), connected via waveguides, allowing for improved detection field and spatial resolution, and enabling continuous operation even with body part deformation, by optimizing antenna placement and reducing waveguide length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the number of radars is increased to increase peripheral detection volume, then the detection coverage is improved, but the cost increases
Solution Approach 1:
A single radar device performs multiple functions by detecting objects in different spatial zones using multiple beam directions. The radar alternates between first and second beam directions to monitor different zones, eliminating the need for separate radar units for each zone while maintaining comprehensive coverage.
Solution Approach 2:
The radar device dynamically switches between different beam directions (first and second directions) to adaptively monitor different spatial zones. This dynamic beam switching allows one radar to replace multiple static radars, reducing overall system cost while maintaining comprehensive detection coverage.
2Volume of moving object
If the number of radars is increased to increase peripheral detection volume, then the detection coverage is improved, but the energy consumption increases
Solution Approach 1:
A single radar device performs multiple functions by detecting objects in different spatial zones using multiple beam directions. The radar alternates between first and second beam directions to monitor different zones, eliminating the need for separate radar units for each zone while maintaining comprehensive coverage.
Solution Approach 2:
The radar device dynamically switches between different beam directions (first and second directions) to adaptively monitor different spatial zones. This dynamic beam switching allows one radar to replace multiple static radars, reducing overall system cost while maintaining comprehensive detection coverage.
3Volume of moving object
If the number of radars is increased to increase peripheral detection volume, then the detection coverage is improved, but the available mounting area becomes insufficient
Solution Approach 1:
A single radar device performs multiple functions by detecting objects in different spatial zones using multiple beam directions. The radar alternates between first and second beam directions to monitor different zones, eliminating the need for separate radar units for each zone while maintaining comprehensive coverage.
4Area of moving object
If radars are miniaturized to fit limited mounting area, then the mounting feasibility is improved, but the spatial resolution deteriorates
Solution Approach 1:
The system uses different beam directions (first and second directions) from a single miniaturized radar to achieve comprehensive spatial coverage. By changing the beam direction parameter, the system compensates for the reduced physical size, maintaining effective detection capability without requiring larger antenna apertures.
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
Enhances detection range and spatial resolution, reduces energy consumption, and facilitates more efficient implementation in vehicles by allowing for better integration and reduced repair costs through flexible antenna placement and shared electronic units.
Implementation Method 1
a first reflective cavity reflecting electromagnetic waves wherein a first metasurface is positioned
Implementation Method 2
said first antenna being configured to be connected to the electronic unit via a first waveguide and to transmit an electromagnetic wave, transmitted by the electronic unit and propagated via the first waveguide
Implementation Method 3
a first metasurface is positioned, said first antenna being configured to be connected to the electronic unit via a first waveguide and to transmit an electromagnetic wave, transmitted by the electronic unit and propagated via the first waveguide, in a first predetermined direction
Data Source
AI summary
Radar system for a motor vehicle includes an electronic unit configured to transmit and receive an electromagnetic wave in a predetermined frequency range, a first directional antenna which is arranged on a first body part of the vehicle and has a first cavity reflecting electromagnetic waves, wherein a first metasurface is positioned, a second directional antenna which is arranged on a second body part and has a second cavity reflecting electromagnetic waves wherein a second metasurface is positioned, said second antenna being configured for connection to the electronic unit via a second waveguide and for transmitting an electromagnetic wave transmitted by the electronic unit and propagated via the second waveguide in a second predetermined direction and/or for propagating a received electromagnetic wave to the electronic unit via the second waveguide.