Choosing a rational structure and studying the radio and technical characteristics of fabrics for protection from electromagnetic radiation

The research is devoted to topical issues of designing, choosing a rational structure and studying the radio and technical properties of fabrics designed to shield electromagnetic radiation of the radio frequency range. The article shows that single - layer woven structures can provide effective protection against electromagnetic radiation of the radio frequency range due to a high degree of reflection (Cref = 88...99 %). If necessary, by alternating fabrics with different reflection and absorption coefficients in the package, the effect of multiple internal reflection can be realized. The conducted studies have confirmed that the shielding properties of fabrics can be varied by changing the geometry of the cell formed by the conductive threads of the warp and weft. The dependence between the length of the electromagnetic wave and the size of the side of the cell necessary for its reflection is confirmed. For effective shielding, it is proposed to use combined yarns with different percentages of steel fibers and combined electrically conductive threads, which should contain metal wire with low electrical resistance (copper and its alloys, steel). Fabrics with a surface density from 55 to 220 g/m2 have been developed, which have a transmission coefficient equal to or less than -30 dB at a radiation frequency from 300 kHz to 16 GHz.