Electromagnetically Symmetric Metasurfaces for Wider-Band Waveguides
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Solution Overview
Problem
Existing metasurface structures facing each other lack the necessary design freedom to achieve higher symmetry, particularly in dielectric or partly dielectric materials, limiting their application in achieving mirror-symmetry or glide symmetry for advanced electromagnetic properties.
Innovation Solution
A metasurface arrangement comprising two metasurfaces with periodic or quasi-periodic structures, where one metasurface is in a dielectric material and the other in an electrically conducting material, configured to yield equivalent responses to incident electromagnetic waves, enabling mutual electromagnetical symmetry and allowing for the use of different materials while maintaining desired electric properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metallic structures are used for both metasurfaces to achieve glide symmetry, then electromagnetic symmetry is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent applies the copying principle by creating an electromagnetic copy of the metallic metasurface response using a dielectric metasurface. The dielectric structure is designed to replicate the electromagnetic characteristics of the metallic structure, achieving equivalent symmetry properties without requiring actual metallic components on both sides. This allows one metasurface to be dielectric while the other remains metallic, simplifying manufacturing while preserving the required electromagnetic symmetry for glide reflection properties.
2Ease of manufacture
If different materials are used for the two metasurfaces, then manufacturing ease and cost are improved, but achieving equivalent electromagnetic response becomes more difficult
Solution Approach 1:
The patent employs parameter changes by systematically adjusting the geometric parameters of the dielectric metasurface structures (such as element shape, size, spacing, and arrangement) to compensate for the different material properties compared to metallic structures. By modifying these physical parameters, the dielectric metasurface achieves equivalent electromagnetic response to what would be obtained with metallic structures, enabling different materials to be used while maintaining the required symmetry and performance characteristics.
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
This configuration allows for easier and less expensive manufacturing while retaining desired electric properties, enabling the creation of structures like parallel plate waveguides and Electromagnetic Band Gaps that can stop unwanted propagation, and provides wider bandwidth and lower dispersion, making them suitable for applications such as RF interconnects and lenses.
Implementation Method 1
the periodic or quasi-periodic structure on the first metasurface is configured to yield a first response to an incident electromagnetic wave between the two metasurfaces, and the periodic or quasi-periodic structure on the second metasurface is configured to yield a second response to the incident electromagnetic wave
Data Source
AI summary
The present disclosure relates to a metasurface arrangement including a first metasurface and a second metasurface which run mutually parallel and face each other. Each metasurface includes a corresponding periodic or quasi-periodic structure formed in a respective pattern. The first metasurface is formed in a dielectric material structure and the second metasurface is formed in either a dielectric material structure or in an electrically conducting structure. The periodic or quasi-periodic structure on the first metasurface is configured to yield a first response to an incident electromagnetic wave between the two metasurfaces, and the periodic or quasi-periodic structure on the second metasurface is configured to yield a second response to the incident electromagnetic wave between the two metasurfaces that is equivalent to the first response, thereby rendering the two metasurfaces mutually electromagnetically symmetric.