Vehicle Radar Radome Partition Wall Electromagnetic Compatibility
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Solution Overview
Problem
Conventional radomes for radar sensors in motor vehicles require significant installation space due to the need for separate arrangements of radar beam antennas and feed networks to maintain undisturbed passage of electromagnetic waves, compromising electromagnetic compatibility and increasing production complexity.
Innovation Solution
A radome design with a permeable area for radar waves and an impermeable area, featuring a partition wall with cutouts for conductor tracks, allowing for the co-location of radar wave generation and emission components on a printed circuit board without compromising electromagnetic compatibility, and incorporating adjustable shielding and heating elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antennas and feed network are arranged at a distance from each other to maintain undisturbed radar beam passage, then electromagnetic compatibility is improved, but installation space increases
Solution Approach 1:
The radome is divided into a first area with a radome wall that is permeable to radar waves and a second area that is impermeable to radar waves. The partition wall with cutouts separates these areas, allowing conductor tracks to pass through while maintaining electromagnetic shielding. This segmentation enables antennas to be placed in the permeable area while the feed network remains in the impermeable area, eliminating the need for large separation distances.
Solution Approach 2:
Different areas of the radome have different electromagnetic properties: the first area has a radome wall structure that allows radar wave passage, while the second area provides electromagnetic shielding. The partition wall combines both permeable and impermeable characteristics through its cutout design, creating local quality variations that satisfy both radiation and shielding requirements simultaneously.
2Reliability
If separate wiring is used to connect antenna traces to feed network, then electromagnetic compatibility is improved, but device complexity and production cost increase
Solution Approach 1:
The partition wall integrates multiple functions: it separates the permeable and impermeable areas, provides electromagnetic shielding, and simultaneously serves as a conductor track carrier. The conductor tracks are formed directly on the partition wall, merging the shielding structure and electrical connection structure into a single integrated component, thereby simplifying production and reducing complexity.
Solution Approach 2:
The partition wall performs multiple functions: electromagnetic shielding, structural separation, and electrical connection. By making the partition wall universal, it eliminates the need for separate shielding structures and wiring harnesses, reducing both device complexity and production cost while maintaining electromagnetic compatibility.
3Reliability
If shielding thickness is increased to suppress electromagnetic waves, then electromagnetic compatibility is improved, but installation space increases
Solution Approach 1:
The shielding effectiveness is optimized by adjusting the thickness of the partition wall and the configuration of its cutouts rather than uniformly increasing shielding thickness throughout the radome. This parameter optimization achieves the required electromagnetic compatibility while minimizing the overall radome volume.
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 design reduces installation space, simplifies production, and maintains electromagnetic compatibility, enabling flexible and cost-effective integration of radar sensor components while effectively suppressing unwanted electromagnetic waves.
Implementation Method 1
a partition wall (T), which is arranged in the transition area between the first area and the second area, wherein the partition wall has cutouts (D) for the passage of conductor tracks from the first area into the second area
Implementation Method 2
the radome, preferably the shielding, includes heating means
Data Source
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AI summary
The invention relates to a radome for a radar sensor in a motor vehicle. The radome comprises a first region which is transparent to at least a certain type of electromagnetic waves, in particular radar waves, and a second region which comprises a shield, so that the second region is opaque to the specific type of electromagnetic waves. The invention likewise relates to a radar sensor and to a use thereof.