Mesh Antenna Layout for Transparent Display Integration
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Solution Overview
Problem
The challenge is to design an antenna for high-frequency communication that can be integrated into display devices with limited space without obstructing the image quality, while maintaining transparency and flexibility, as the radiator may overlap with the display region.
Innovation Solution
The antenna device incorporates a dielectric layer with a radiator and transmission line in a mesh structure, where the transmission line width is an integer multiple of the unit cell width, and includes a signal pad, ground pad, and a dummy pattern to prevent signal loss and improve antenna gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the antenna is integrated into the display device with limited space, then the communication function is achieved, but the radiator overlaps with the display region causing image quality deterioration
Solution Approach 1:
The patent transitions the antenna design from a planar two-dimensional structure to a three-dimensional configuration by positioning the radiator above the display surface. This vertical displacement allows the radiator to operate in a separate spatial dimension, preventing overlap with the display region while maintaining integration with the display device.
Solution Approach 2:
The patent embeds the antenna components within the display device structure by placing the radiator above the display surface and connecting it through a feed line that passes through or along the display device layers. This nesting approach integrates the antenna function within the existing display device form factor without requiring additional external space.
2Reliability
If the transmission line width is increased to reduce signal loss, then the antenna gain is improved, but the transmission line occupies more space in the limited area
Solution Approach 1:
The patent optimizes the transmission line dimensions by setting the width to an integer multiple of the unit cell width and controlling it within a specific range (0.05λ to 0.15λ). This parameter optimization achieves a balance between signal loss reduction and space consumption, allowing effective signal transmission within the limited available area.
Solution Approach 2:
The patent employs a mesh structure for the transmission line where the width is an integer multiple of the unit cell width. This partial filling approach (using integer multiples rather than continuous variation) provides sufficient signal transmission capability while minimizing the overall area occupied by the transmission line.
3Illumination intensity
If the mesh structure unit cell width is decreased to improve transparency, then the display transparency is enhanced, but the transmission line width becomes difficult to control within the allowable error range
Solution Approach 1:
The patent establishes a specific relationship between transmission line width and unit cell width, defining the transmission line width as an integer multiple of the unit cell width within a controlled range (0.05λ to 0.15λ). This parameter relationship provides manufacturing tolerance, allowing transparency to be improved by reducing unit cell size while maintaining manufacturability through the integer multiple relationship.
Solution Approach 2:
The patent uses a discrete integer multiple relationship between transmission line width and unit cell width, which provides built-in tolerance for manufacturing variations. This partial specification (allowing a range of 0.05λ to 0.15λ) accommodates manufacturing precision limitations while still achieving the desired transparency and performance characteristics.
Data Source
AI summary
An antenna device according to an aspect includes a dielectric layer, a radiator formed on the dielectric layer, and a transmission line connected to the radiator on the dielectric layer and formed in a mesh structure which is a set of unit cells defined by a plurality of conductive lines. A width of the transmission line may be an integer multiple of the width of the unit cell, and may be within an allowable error range.