Evaluation of the Efficiency of Two-Layer Fabrics for Electromagnetic Shielding

Abstract

The need to protect people and sensitive electronic and electrical devices from the detrimental effects of electromagnetic radiation (EMR) is a pressing issue across various sectors, including medical equipment, aviation, telecommunications, electronics, and electrical engineering. Insufficient EMI protection can pose serious risks to the safety, reliability and operational efficiency of various industries and economic sectors. The study aims to assess the efficacy of applying two-layer fabrics for EMR shielding with the frequency range from 2 to 17 GHz. The findings suggest that the use of two-layer packages of shielding fabrics is effective only when the steel fiber content is relatively low. As the mass of steel fibers in the fabric significantly increases, due to a denser arrangement of the yarns containing them, the addition of layers does not considerably affect the ability to reflect EMR. Experimental results indicate that as the steel mass increases to 18 g/m2 of fabric, the effect of adding layers entirely diminishes. The most plausible explanation for this effect is a substantial increase in the influence of multiple re-reflection of electromagnetic waves in packages formed from such fabrics. The obtained results will contribute to the development of shielding fabrics and packages based on them, aiming to provide optimal protection within specified frequency ranges, taking while considering the specific operational requirements.

Keywords

• steel fiber
• electromagnetic radiation
• double-layer fabrics
• anti-static yarn
• reflection coefficient
• transmission coefficient
• shielding efficiency