Millimetric Fractal Plasmonic Arrays for 5G Window Integration
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Solution Overview
Problem
Existing directional antennas for 5G systems are unable to leverage the smaller size and placement opportunities afforded by higher frequency bands, particularly in scenarios like 5G cell deployments in buildings, where they are cumbersome and aesthetically unappealing for window or wall mounting.
Innovation Solution
A millimetric fractal plasmonic array using a thin-film, optically transparent or translucent sheet with close-packed fractal antenna elements that are electromagnetically coupled through evanescent waves, allowing for a low-profile, unobtrusive installation on windows or other structures, with a non-invasive feed system and beam-steering capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional directional antennas are used for 5G systems, then high gain is achieved, but the antenna size and complexity increase making them unsuitable for window mounting
Solution Approach 1:
The antenna is divided into multiple fractal elements arranged in an array on the window surface. Each element is a small fractal structure that collectively provides high gain when operated together, eliminating the need for a single large complex antenna structure
Solution Approach 2:
Fractal geometry is used where self-similar patterns are nested within themselves at different scales. The antenna elements contain fractal patterns that are repeated at multiple levels of magnification, allowing compact structures that pack high complexity into small window-mounted areas
2Reliability
If traditional directional antennas are used for 5G systems, then high gain is achieved, but the aesthetic appeal and unobtrusiveness are compromised
Solution Approach 1:
The antenna is implemented as a thin-film structure that can be applied directly to window glass surfaces. This thin-film approach makes the antenna nearly invisible from the exterior while maintaining full functionality, completely resolving the aesthetic concern
3Adaptability or versatility
If feed systems are added to traditional antennas, then functionality is improved, but the overall form factor becomes too large for window integration
Solution Approach 1:
The feed system is integrated directly with the fractal antenna elements on the same window plane. The feeding network uses microstrip lines or coplanar waveguides that are printed directly on the window surface, merging the feed system and antenna into a single co-planar structure that requires no additional space
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
Enables a nearly invisible, high-gain antenna solution that can effectively operate at millimetric wavelengths, addressing the physical and aesthetic challenges of traditional antenna systems while supporting 5G frequency allocations without compromising window functionality.
Implementation Method 1
close-packed fractal antenna elements that are electromagnetically coupled through evanescent waves
Implementation Method 2
a thin-film sheet, preferably optically transparent or optically translucent
Data Source
AI summary
Fractal plasmonic arrays are described that operate at millimeter-based wavelengths and that include a thin-film sheet, preferably optically transparent or optically translucent, attached either on the inside or outside of a window or laminated in layers within, adjacent to, or outside a window.