Transparent Antenna Mesh Pattern for Optical Transparency
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Solution Overview
Problem
Existing thin-film antennas on transparent surfaces face a compromise between optical transparency and conductivity, leading to reduced antenna performance and visibility issues when attempting to be both undetectable and efficient.
Innovation Solution
A transparent antenna design featuring conductive and non-conductive regions with a geometry that maintains at least 50% average optical transparency in both, using a pattern of micro-wires and a fill pattern of non-conductive material to mask visibility, achieved through flexographic printing and electroless plating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick layer of conductive material is used to improve antenna conductivity, then antenna performance is improved, but optical transparency deteriorates
Solution Approach 1:
The antenna is segmented into a mesh pattern of conductive material distributed across the transparent surface. This segmentation allows the conductive elements to be thin enough to maintain transparency while collectively providing sufficient conductivity for antenna function. The mesh structure divides the conductive material into many small segments that together form the antenna pattern.
Solution Approach 2:
The conductive material is applied with varying local properties - the mesh lines have sufficient conductivity for antenna operation, while the spaces between lines maintain high transparency. The local quality of the conductive material is optimized to provide just enough conductivity in the antenna regions while preserving optical clarity in the overall structure.
2Illumination intensity
If a thin layer of conductive material is used to improve optical transparency, then transparency is improved, but antenna conductivity deteriorates
Solution Approach 1:
The antenna functionality is achieved through segmentation into a mesh pattern where many thin conductive segments collectively provide the necessary conductivity. Each individual segment can be very thin to maintain transparency, but the cumulative effect of all segments in the antenna pattern provides sufficient electrical conductivity for proper antenna operation.
Solution Approach 2:
The antenna structure uses a composite approach combining transparent substrate material with a mesh pattern of conductive material. This composite structure integrates the optical properties of the transparent substrate with the electrical properties of the conductive mesh, achieving both transparency and conductivity in a single integrated design.
3Reliability
If conductive material is applied in a dense pattern to improve conductivity, then antenna performance is improved, but visibility of the antenna increases
Solution Approach 1:
The conductive material is segmented into a mesh pattern with distributed spacing, which reduces the visibility of individual conductive elements while maintaining overall antenna functionality. The segmentation creates a pattern that is less visually detectable than a solid continuous conductor, as the gaps between mesh elements break up the visual continuity.
Solution Approach 2:
The conductive material in the mesh pattern can be treated with reflective or absorptive coatings that match the surrounding transparent surface characteristics. This color/reflectivity matching reduces the visual contrast between the conductive elements and the background, making the antenna less detectable while preserving its electrical functionality.
4Difficulty of detecting and measuring
If conductive material is applied in a sparse pattern to reduce visibility, then transparency is improved, but antenna conductivity deteriorates
Solution Approach 1:
The mesh pattern segments the conductive material into numerous distributed elements that collectively provide sufficient conductivity despite the sparse appearance of individual elements. The segmentation allows the antenna to function with lower visual impact while maintaining electrical performance through the cumulative effect of many small conductive paths.
Solution Approach 2:
The antenna design transitions from considering only the two-dimensional spacing of conductive elements to incorporating the third dimension of mesh depth and layering. By optimizing the mesh structure in multiple dimensions, the design achieves sufficient conductivity through the combined effect of numerous thin conductive paths rather than relying on thick individual conductors.
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 allows for a visually undetectable antenna on transparent surfaces while maintaining sufficient conductivity, enhancing both optical transparency and antenna performance by ensuring the average transparency in conductive and non-conductive regions differs by no more than 10%, thus improving visibility and efficiency.
Implementation Method 1
a conductive material disposed on a surface of the substrate in one or more conductive regions, wherein a geometry of the conductive regions defines an antenna pattern
Implementation Method 2
a non-conductive material disposed on the surface of the substrate in a fill pattern including one or more non-conductive regions... the transparent antenna is configured so that an average optical transparency in the conductive regions differs from the average optical transparency in the non-conductive regions by no more than 10%
Data Source
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AI summary
A transparent antenna includes a conductive material disposed on a surface of a non-opaque substrate in one or more conductive regions, wherein a geometry of the conductive regions defines an antenna pattern. A non-conductive material is disposed on the surface of the substrate in a fill pattern which is an inverse of the antenna pattern. An average optical transparency in the conductive regions and the non-conductive regions is at least 50%, and the average optical transparency in the conductive regions differs from that of the non-conductive regions by no more than 10%.