Stretchable Meta-Skin With Liquid Conductor Tuning
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Solution Overview
Problem
Current meta-materials face challenges in tunability, reversibility, and long-term usability due to rigid substrates and difficulties in changing the shape of metal resonators to tune resonant frequencies, especially when applied to various form factors and frequencies.
Innovation Solution
Development of flexible and stretchable meta-skins with elastomer-based meta-atoms containing liquid conductors, where the shape and thickness of voids and elastomer layers can be mechanically adjusted to tune electromagnetic properties, allowing for broad frequency tuning and cloaking effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rigid substrates are used in meta-materials, then structural stability is improved, but adaptability to different form factors deteriorates
Solution Approach 1:
The patent replaces rigid substrates with flexible elastomeric substrates that can conform to different form factors while maintaining structural integrity. The elastomeric material allows the meta-material to be stretched, bent, and shaped without damage, enabling adaptation to curved surfaces and various geometries while preserving the meta-atom patterns and their electromagnetic functionality.
Solution Approach 2:
The patent introduces mechanically tunable meta-atoms where the resonant frequency can be dynamically adjusted by applying mechanical stress or strain to the elastomeric substrate. This dynamic adjustment capability allows the meta-material to adapt its electromagnetic properties in real-time, resolving the contradiction between structural stability and adaptability to different operational conditions.
2Reliability
If metal resonators are used, then electromagnetic resonance effects are improved, but tunability of resonant frequency deteriorates
Solution Approach 1:
The patent changes the physical parameters of the meta-atoms by deforming the elastomeric substrate, which alters the geometry and spacing of the embedded conductive patterns. This mechanical parameter change directly tunes the resonant frequency of the meta-atoms without requiring replacement of the metal resonators themselves, thus maintaining reliable resonance effects while achieving broad frequency tunability.
Solution Approach 2:
The patent creates dynamically tunable meta-atoms where the resonant frequency can be adjusted in real-time through mechanical actuation of the elastomeric substrate. The conductive patterns embedded in the elastomer can be stretched, compressed, or bent to continuously vary the resonant frequency, providing both reliability of resonance and versatility of tuning.
3Adaptability or versatility
If elastomeric materials with printed meta-material patterns are used, then flexibility is improved, but durability under stretching and bending deteriorates
Solution Approach 1:
The patent merges the substrate and the meta-atom patterns into a unified structure where conductive patterns are embedded within or formed as integral parts of the elastomeric material. This integration eliminates the risk of pattern damage during stretching and bending, as the patterns move flexibly with the substrate rather than being rigidly attached to its surface.
Solution Approach 2:
The patent uses composite material structures combining elastomeric substrates with embedded conductive materials or patterns. The composite design allows the elastomer to provide flexibility and mechanical compliance while the conductive components maintain their electromagnetic functionality, achieving both flexibility and durability through material synergies.
4Adaptability or versatility
If microfluidic manufacturing methods are used to create voids, then reconfigurability is improved, but practical implementation issues arise
Solution Approach 1:
The patent achieves reconfigurability by changing the physical state or properties of materials within the meta-atoms, such as using phase-change materials or liquid crystals that can alter their electromagnetic properties in response to external stimuli. This approach provides practical reconfigurability through material property changes rather than complex structural reconfiguration, improving ease of manufacture while maintaining adaptability.
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 meta-skins demonstrate significant scattering suppression and frequency tuning over a wide range, enabling applications in microwave stealth technology and protection of electronic devices from microwave exposure.
Implementation Method 1
The shapes can be designed for certain effects. One example is scattering of electromagnetic wave.
Implementation Method 2
The shapes can be designed for certain effects. These effects can be tuned or varied by one or more of mechanically stretching the elastomer
Implementation Method 3
tunable frequency selective and cloaking effects
Data Source
AI summary
Systems, methods, and apparatus for meta-materials which are stretchable and tunable using an array of liquid conductor meta-atoms encased in one or more layers of elastomer. Fabrication techniques allow effective manufacture of the metamaterial in a number of form factors for a number of applications, including but not limited to fabrics or wraps around three-dimensional shapes.