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Electromagnetic Interference Shielding Anisotropy of Unidirectional CFRP Composites
1Interdisciplinary Graduate School of Science and Technology, Shinshu University, Ueda 386-8567, Japan.
Materials (Basel, Switzerland)
|April 30, 2021
Summary
Carbon fiber-reinforced polymer (CFRP) composites exhibit anisotropic electromagnetic interference (EMI) shielding. This study developed a formula to predict shielding performance based on fiber orientation, aiding in designing directional EMI shielding products.
Area of Science:
- Materials Science
- Electromagnetics
- Composite Materials
Background:
- Carbon fiber-reinforced polymer (CFRP) composites are crucial for their mechanical strength and electromagnetic interference (EMI) shielding capabilities.
- Growing concerns about electromagnetic pollution drive research into advanced EMI shielding solutions.
- Understanding the anisotropic nature of CFRP shielding is vital for effective application.
Purpose of the Study:
- To investigate the electromagnetic interference (EMI) shielding anisotropy in carbon fiber-reinforced polymer (CFRP) composites.
- To develop a predictive model for EMI shielding performance based on fiber orientation.
- To clarify the underlying mechanisms of EMI shielding anisotropy in CFRP materials.
Main Methods:
- Utilized a free-space measurement setup to evaluate EMI shielding performance.
- Measured electrical conductivity variations in unidirectional CFRP composites concerning fiber orientation angles.
- Compared free-space measurements with the coaxial transmission line method.
Main Results:
- Demonstrated significant EMI shielding anisotropy in unidirectional CFRP composites.
- Established a theoretical formula that accurately predicts EMI shielding values across different carbon fiber orientation angles.
- Observed high consistency between experimental data and the predictions of the theoretical formula.
Conclusions:
- The study clarifies the mechanism behind EMI shielding anisotropy in CFRP composites.
- A validated theoretical formula enables the prediction of shielding performance based on fiber orientation.
- Findings facilitate the design of CFRP-based EMI shielding products with controllable shielding direction and frequency.
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