Predictive Analysis of the Electromagnetic Shields Effectiveness

This paper presents a predictive analysis of the electromagnetic attenuation effectiveness for conductive textile materials obtained by coating with polypyrrole, conductive paste-based aluminum, nickel, copper, silver, and graphene oxide. The predictive analysis was provided by the multiple regression modeling of the effectiveness of electromagnetic attenuation at 5 MHz, respective 700 MHz frequency depending on independent variables such as mass (M [g/m2]) and thickness (δ [mm]) of the fabric coated with the conductive paste by screen printing. Usually, flexible electromagnetic shields, based on textile materials, are necessary for shielding electric fields, representing a potential reference for cables and filters and ensuring the return path of parasitic currents. Protection against the harmful action of electromagnetic fields can be achieved using textile screens based on conductive coatings that ensure the reflection of the waves when they meet the surface, respectively, the absorption of the waves. In general, the wave representing the incident electromagnetic field propagates in the direction of the screen, undergoing a reflection at contact with the screen, then repeated internal reflections inside it, part of the wave being transmitted into the protected space.