Radar Cover Shield Structure With Drainage Gaps for Wet Conditions
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Solution Overview
Problem
Existing electromagnetic shields with projecting strips face challenges in water drainage, leading to decreased performance when water accumulates on their surface, affecting the attenuation of electromagnetic waves.
Innovation Solution
The electromagnetic shield features a plate-shaped base with projecting strip portions and spaces that act as gaps or holes, allowing water to drain easily by providing a drainage path, thereby maintaining the shield's performance even when water is present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If projecting strips are formed on the surface of the electromagnetic shield to improve electromagnetic wave attenuation, then the shielding performance is improved, but water accumulates on the surface leading to decreased performance
Solution Approach 1:
The electromagnetic shield incorporates a porous structure with through-holes formed in the projecting strips. This porous design allows water to drain through the structure rather than accumulating on the surface, while the projecting strips maintain their electromagnetic wave scattering and attenuation functions. The through-holes create drainage paths that eliminate the harmful effect of water accumulation.
Solution Approach 2:
The projecting strips are segmented by forming through-holes within them, dividing the solid strip structure into sections with internal passageways. This segmentation creates multiple drainage routes for water to escape, preventing water pooling while preserving the electromagnetic shielding functionality of the strip structure.
2Object-affected harmful factors
If the surface is made flat to facilitate water drainage, then water drainage is improved, but electromagnetic wave attenuation performance decreases
Solution Approach 1:
The electromagnetic shield employs different surface characteristics in different locations: the projecting strips provide local scattering and attenuation of electromagnetic waves, while the through-holes in these strips provide local drainage pathways. This local differentiation of functions allows both electromagnetic wave attenuation and water drainage to be achieved simultaneously without compromising either performance.
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 design effectively facilitates water drainage, preventing water accumulation and ensuring consistent electromagnetic shielding performance, even in wet conditions.
Implementation Method 1
scattering bodies made of a second dielectric material and each having a particular shape are cyclically arranged in a matrix made of a first dielectric material
Implementation Method 2
the diffused reflection structure diffusely reflects an incident wave from a radar device to disperse the energy of the incident wave
Implementation Method 3
the electromagnetic shield includes a dielectric
Data Source
AI summary
An electromagnetic shield includes a plate-shaped base having a first surface and a second surface. The first surface is a surface configured to allow an electromagnetic wave to be incident on the first surface. The second surface is distant from the first surface and extends along the first surface. The electromagnetic shield includes projecting strip portions. The electromagnetic shield includes a dielectric. The electromagnetic shield has a space forming either a gap or a hole, and the gap or the hole is in contact with the projecting strip portion along a direction intersecting with a longitudinal direction of the projecting strip portion.