Transparent mmW Reflective Structure for Selective 5G Signal Routing
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Solution Overview
Problem
Current 4G communication systems face limitations in ultra-low latency and ultra-high connection, necessitating the development of 5G technologies that can handle increased data traffic and provide faster wireless networks for next-generation technologies like virtual reality and IoT, while existing repeater systems for millimeter wave (mmW) communication are costly and lack frequency selectivity.
Innovation Solution
A millimeter wave (mmW) reflective structure, reflection-directed structure, and transmission structure utilizing a transparent substrate with conductive patterns in a matrix format, allowing for frequency selective reflection and transmission of mmW while maintaining high visible light transmittance, thereby addressing the limitations of existing repeater systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional repeater systems are used for mmW communication, then signal coverage can be extended, but production costs increase and frequency selectivity is lost
Solution Approach 1:
The repeater system is segmented into multiple independent unit cells, each with its own conductive pattern. This allows the large-scale system to be manufactured using standard PCB techniques rather than requiring expensive custom fabrication, thereby reducing production costs while maintaining signal coverage through the collective effect of all unit cells
Solution Approach 2:
The conductive patterns in each unit cell are designed with specific geometric parameters (size, shape, spacing) that are tuned to resonate at particular mmW frequencies. This frequency-selective parameter design enables the system to extend coverage only for desired frequency bands while rejecting others, providing both cost-effective manufacturing and frequency selectivity
2Reliability
If conventional repeater systems are used for mmW communication, then signal coverage can be extended, but frequency selectivity is lost
Solution Approach 1:
Each unit cell contains conductive patterns with locally optimized geometric properties (different sizes, shapes, and configurations) that are specifically designed to respond to certain frequency ranges. This local quality variation across unit cells enables the overall system to achieve frequency selectivity while maintaining broad signal coverage through the combined response of all cells
Solution Approach 2:
The conductive patterns within unit cells employ asymmetric geometric designs rather than symmetric configurations. This asymmetry creates frequency-dependent resonance characteristics that provide frequency selectivity, allowing the system to differentiate between desired and undesired frequencies while still extending coverage across multiple bands
3Reliability
If conductive patterns are added to transparent substrate for mmW reflection, then mmW reflection capability is improved, but visible light transmittance may decrease
Solution Approach 1:
The conductive patterns are designed with dimensions (length and width) that are large enough to effectively interact with and reflect mmW signals, but the overall pattern density and line thickness are optimized so that the structure remains visually transparent. This dimensional optimization allows the same structure to be effective for both mmW reflection and visible light transmission by operating at different scales
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 proposed structures effectively reflect and direct mmW signals with high selectivity, reducing production costs and visual recognition, while maintaining high transmittance of visible light, thus enabling efficient mmW communication and supporting the demands of 5G networks.
Implementation Method 1
a millimeter wave (mmW) reflective structure configured to reflect incident millimeter waves
Implementation Method 2
Transmittance of visible light in the mmW reflective structure may be about 70% or more
Data Source
AI summary
A millimeter-wave reflective structure configured to reflect incident millimeter waves includes: a transparent substrate defining unit cells in the form of a matrix, the transparent substrate having an upper surface; and conductive patterns arranged in the unit cells on the transparent substrate, each of the conductive patterns having a hollow rectangular shape.