The analysis of attenuation of electromagnetic field by woven structures based on hybrid fancy yarns

Abstract

In this paper we present an analysis of attenuation by woven structures produced from hybrid yarns. The woven structures have been designed for protection against electromagnetic fields (EMFs). The idea of creating hybrid yarns that may intensively protect against EMFs comes from the analogy discovered between the construction of a fancy bunch yarn and an electric system composed of electro-conductive solenoids on a ferromagnetic material connected in series and then in parallel. The application of hybrid fancy yarn as a weft made of copper as a special effect thread insulated with lacquer and wrapped around a core of steel thread in a textile fabric will enable EMF attenuation as a result of inducing an electromotive force in the special effect thread and magnetizing the core thread. In this way, the designed electric circuit (textile fabric) in the variable primary EMF will be the source of a secondary EMF directed opposite to the direction of the primary field. The fabricated woven structures present electrical and magnetic components of EMF attenuation in some narrow ranges.