Shielding effectiveness evaluation of metallized and polypyrrole-coated fabrics

Materials for electromagnetic shielding are increasingly needed to protect electronic devices from interference problems and to avoid dangerous effects on human health due to electromagnetic radiation. Several shielding applications require solutions that textiles can suitably fulfill. Here the electromagnetic interference shielding of metallized, PPy-coated woven and non-woven polyester fabrics is provided in the frequency range 100—1000 MHz, measuring the insertion losses produced by these conductive fabrics in a dual TEM cell. From the insertion loss data, the shielding effectiveness, and the reflection and absorption coefficients are estimated.