Radar Housing Barrier Structure for Azimuth Error Suppression
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Solution Overview
Problem
Millimeter wave radars experience performance deterioration when mounted on vehicles due to undesired waves causing interference and errors in azimuth detection, particularly from reflected waves on the bumper and backside radiation.
Innovation Solution
The radar device incorporates a housing with a peripheral edge that includes a barrier part protruding outward from the radome along the antenna surface, which suppresses undesired waves from propagating to the backside and causing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional absorption elements are added to suppress undesired waves, then radar performance is improved, but production cost and device complexity increase
Solution Approach 1:
The housing structure is merged with the wave suppression function by integrating the barrier part directly into the housing peripheral edge. This eliminates the need for separate absorption elements while maintaining the ability to suppress undesired waves and improve radar performance.
Solution Approach 2:
The housing peripheral edge is designed to serve multiple functions: structural support, mounting, and wave suppression. The barrier part protruding from the radome performs the wave suppression function as part of the housing structure, making the housing a multi-functional component that reduces overall device complexity.
2Reliability
If additional absorption elements are added to suppress undesired waves, then radar performance is improved, but production cost increases
Solution Approach 1:
The wave suppression function is combined with the housing structure through the barrier part, eliminating the need for separate absorption elements. This reduces the number of components that need to be manufactured and assembled, thereby lowering production costs while maintaining radar performance.
Solution Approach 2:
The housing peripheral edge is designed to serve multiple functions including structural support and wave suppression. This multi-functionality reduces the total component count and simplifies manufacturing processes, leading to lower production costs.
3Object-generated harmful factors
If the housing peripheral edge is designed with a barrier part, then undesired wave propagation is suppressed, but housing structure complexity increases
Solution Approach 1:
The housing peripheral edge is segmented into different functional zones: the main housing body and the protruding barrier part. This segmentation allows the barrier part to specifically target and suppress undesired wave propagation along the antenna surface while the rest of the housing maintains its structural function.
Solution Approach 2:
The barrier part is strategically positioned at the peripheral edge where undesired waves propagate along the antenna surface. This localized structure provides wave suppression precisely where needed without requiring complex modifications to the entire housing structure.
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 effectively reduces azimuth detection errors without the need for additional absorption elements, thereby lowering production costs and improving radar performance.
Implementation Method 1
The radome is made of a material allowing passage of the radio wave emitted by the antenna portion
Implementation Method 2
a barrier part which protrudes outward from the radome along the antenna surface... suppresses undesired waves from propagating to the backside and causing interference
Data Source
AI summary
A radar device comprises an antenna portion, a radome, and a housing. The antenna portion includes an antenna surface provided with one or more antennas, the antenna emitting a radio wave. The radome is made of a material allowing passage of the radio wave emitted by the antenna portion, and is disposed to face the antenna surface. The housing forms, together with the radome, a space for accommodating the antenna portion. The housing includes a peripheral edge which surrounds the antenna surface and is in contact with the radome, at least part of the peripheral edge includes a barrier part which protrudes outward from the radome along the antenna surface.