Transparent Mesh Antenna Layers for Multi-Band AR Glasses
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Solution Overview
Problem
Existing transparent antenna designs struggle to support both mmWave and lower frequency bands, lacking optical invisibility and compactness necessary for integration into devices like augmented reality glasses.
Innovation Solution
A transparent combination antenna system utilizing multiple layers of transparent conductive mesh, with varying pitches to accommodate both high and low frequency antennas, allowing them to operate on the same substrate, such as an AR glass lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing transparent antenna designs are used, then optical transparency is maintained, but the ability to support both mmWave and lower frequency bands is lost
Solution Approach 1:
The antenna system is divided into multiple independent transparent mesh layers, each optimized for specific frequency bands. The first mesh layer supports lower frequency bands (sub-6 GHz) while the second mesh layer supports mmWave frequencies (above 24 GHz). Each layer can be independently designed and tuned to maintain optical transparency while providing frequency-specific functionality, thus resolving the contradiction between versatility and transparency.
Solution Approach 2:
The patent employs composite transparent mesh structures combining different mesh configurations, materials, and geometries across multiple layers. By stacking transparent meshes with varying pitches, conductivities, and patterns, the system achieves multi-band frequency support while maintaining overall optical transparency. The composite structure allows each layer to contribute differently to the electromagnetic spectrum coverage without compromising the transparent appearance.
2Adaptability or versatility
If multiple frequency bands are supported, then bandwidth is expanded, but device size increases
Solution Approach 1:
The patent transitions from planar single-layer antenna designs to multi-layer stacked configurations, utilizing the vertical dimension to accommodate multiple frequency bands. By stacking transparent mesh layers at different heights with appropriate spacing, the system expands bandwidth capabilities without increasing the horizontal footprint. This vertical stacking approach allows sub-6 GHz and mmWave antennas to coexist in a compact form factor suitable for AR glasses.
Solution Approach 2:
The antenna system implements a nested structure where multiple frequency band antennas are integrated within a compact stacked arrangement. The transparent meshes are nested vertically with smaller pitch features in upper layers and larger pitch features in lower layers, allowing higher frequency mmWave antennas to be positioned above lower frequency sub-6 GHz antennas. This nesting enables multi-band functionality within a minimal device footprint.
3Reliability
If transparent conductive mesh is used, then optical invisibility is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent systematically varies key parameters of the transparent mesh layers including pitch size, wire diameter, material composition, and layer spacing to optimize both optical transparency and electromagnetic performance for different frequency bands. By controlling these parameters across multiple layers, the system achieves the desired balance between transparency and multi-band functionality while providing a scalable manufacturing approach where each layer can be independently fabricated and then assembled.
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 system achieves improved wireless features by expanding bandwidth to both sub 6 GHz and above 24 GHz spectra, providing high data rates and capacity with a small footprint, while maintaining optical transparency for integration into compact devices.
Implementation Method 1
a first transparent antenna layer 102 that acts as a sub 6 GHz antenna and a second transparent antenna layer 104 that acts as a mmWave antenna
Implementation Method 2
resonance across various frequencies of the transparent combination antenna system versus standard transparent antenna systems
Data Source
AI summary
A transparent combination antenna is disclosed that provides bandwidth at both sub 6 GHz and the above 24 GHz spectra. For example, the transparent combination antenna can include a first layer of transparent conductive material, and a second layer of transparent conductive material. In some implementations, both of the first layer and the second layer can have different pitches. Additionally, in some implementations, a substrate may be positioned in between the first layer and the second layer. Various other systems are also disclosed.