Vehicle Window Glass Antenna Density Layout Across Shielded Regions
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Solution Overview
Problem
Conventional window glass antennas with wide hollowed-out portions in conductive films compromise antenna functionality while attempting to improve appearance by making the conductive body area narrower.
Innovation Solution
A window glass design featuring a planar antenna with a hollowed-out portion that has a higher conductor density over the light shielding region and a lower conductor density over the transmission region, ensuring both improved appearance and functional antenna performance by optimizing the overlap areas and conductor densities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the hollowed-out portion in the conductive film is made wide to improve appearance, then the window glass appearance is improved, but the conductive body area becomes narrow making it difficult to ensure antenna functions
Solution Approach 1:
The patent applies different conductor densities in different regions of the planar antenna. The first conductor part overlapping the light shielding region has a first conductor density, while the second conductor part overlapping the transmission region has a second conductor density that is lower than the first. This local differentiation allows the antenna to maintain sufficient conductive area for reliable antenna functions in the transmission region while achieving improved appearance through the light shielding region design.
2Shape
If the hollowed-out portion is made wide to make the conductive body area narrower, then the appearance is improved, but the antenna area becomes insufficient
Solution Approach 1:
The patent changes the conductor density parameter across different regions of the planar antenna. By setting the second conductor density lower than the first conductor density, the patent optimizes the balance between appearance and antenna area. This parameter change allows sufficient conductive body area to be maintained for antenna functionality while achieving the desired appearance improvement through strategic hollowed-out portion design.
Data Source
AI summary
A window glass for a vehicle including a glass plate, a light shielding layer on the glass plate and a planar antenna including a planar conductor with a hollowed-out portion with at least one hole, wherein, when a region including the light shielding layer is assumed as a light shielding region; and a region including no light shielding layer is assumed as a transmission region, the planar antenna is arranged to lie across a boundary between the light shielding region and the transmission region, and has a first conductor part overlapping the light shielding region and a second conductor part overlapping the transmission region, and, wherein, when an area of overlap of the planar antenna with the light shielding region is assumed as a first overlap area; an area of overlap of the planar antenna with the transmission region is assumed as a second overlap area.