Vehicle Window Member with Segmented Radio-Wave Transmissivity
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Solution Overview
Problem
Existing window technologies do not effectively consider radio-wave transmissivity, particularly for high-frequency bands used in next-generation communications and radar systems, leading to inefficiencies in signal transmission and reception through glass sheets.
Innovation Solution
A window member with a laminated glass structure comprising a first region and a second region, where the second region has higher radio-wave transmissivity than the first region, utilizing a radio-wave transmitting material with less reflection and absorption, enhancing the transmission and reception of millimeter waves and other electromagnetic signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a glass sheet is used for the front glass or window member, then visibility and aesthetic appearance are improved, but radio-wave transmissivity deteriorates due to reflection and absorption
Solution Approach 1:
The glass sheet is divided into a first region (peripheral portion) and a second region (central portion), where each region has different radio-wave transmissivity characteristics. The second region has higher radio-wave transmissivity than the first region, allowing selective optimization of different areas for different functions.
Solution Approach 2:
Different regions of the glass sheet are assigned different properties: the first region (peripheral) maintains standard glass characteristics for structural integrity and visibility, while the second region (central) is optimized for high radio-wave transmissivity to support radar and communication functions.
2Object-affected harmful factors
If a continuous Ag layer is coated on the glass substrate, then reflection resistance is improved, but radio-wave absorption increases
Solution Approach 1:
The Ag layer is applied selectively only to the first region (peripheral portion) of the glass sheet, not the entire surface. This localized application provides reflection resistance where needed for structural integrity while leaving the second region (central portion) free of Ag layer to maintain high radio-wave transmissivity.
Solution Approach 2:
The coating structure is segmented into regions: the first region receives the Ag layer for reflection resistance, while the second region remains uncoated or has minimal coating to preserve radio-wave transmission properties.
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 significantly improves radio-wave transmissivity, reducing signal loss and enhancing the performance of information devices like millimeter wave radars and communication systems by minimizing reflection and absorption, thus improving safety and communication capabilities.
Implementation Method 1
a second region B having higher radio-wave transmissivity than the first region A... the radio-wave transmitting material 30... enhancing the transmission and reception of millimeter waves and other electromagnetic signals
Data Source
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AI summary
This window member, i.e., a vehicle window glass (1), is provided with a transparent substrate, and in plan view of the window member, the transparent substrate itself includes a first region (A), and a second region (B) having a radio wave transmissivity that is higher than that of the first region (A).