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Multilayered salt water with high optical transparency for EMI shielding applications
Duy Tung Phan1, Chang Won Jung2
1Graduate School of Nano IT Design Fusion, Seoul National University of Science and Technology, Seoul, 01811, South Korea.
Scientific Reports
|December 10, 2020
Summary
New multilayered structures using salt water offer excellent optical transparency and electromagnetic interference (EMI) shielding. This breakthrough benefits visual observation in sensitive applications like aerospace and military.
Area of Science:
- Materials Science
- Optics
- Electromagnetics
Background:
- Achieving simultaneous high optical transparency and electromagnetic interference (EMI) shielding is challenging for visual observation applications.
- Conventional materials struggle to meet both optical and shielding requirements for demanding environments like military and aerospace.
Purpose of the Study:
- To develop novel multilayered structures for effective EMI shielding with high optical transparency.
- To investigate the performance of salt water-based structures for simultaneous optical and EMI shielding capabilities.
Main Methods:
- Fabrication of multilayered structures using clear substrates (acrylic and glass) with an internal salt water layer.
- Measurement of optical transparency (OT) and electromagnetic shielding effectiveness (SE) in the X-band.
- Parametric studies involving salt water layer thickness and salinity to optimize performance.
Main Results:
- Achieved optical transparency exceeding 90% with negligible impact on visual observation.
- Demonstrated EMI shielding effectiveness (SE) greater than 20 dB in the 7.5–8.5 GHz X-band.
- Showed significant enhancement in SE with increased salt water thickness and salinity, improving both OT and SE simultaneously.
Conclusions:
- Multilayered salt water structures present a promising solution for simultaneous high optical transparency and EMI shielding.
- The proposed structures are suitable for EMI shielding in visual observation applications, particularly in aerospace and military contexts.
- Tuning salt water salinity and layer thickness offers a viable method to enhance both optical and shielding performance.
