Abstract:

In order to research the general influence factors of the shielding effectiveness of the fabrics, the model samples of metal yarns with different arrangement mode were prepared. Using shielded chamber, the factors of shielding effectiveness(SE) and reflection coefficients were systematically analyzed within 1~18GHz. It shows that the direction of samples will affect greatly the SE when tested with shielded chamber because of the directionality of EM field. The arrangement distance of metallic yarns is an important factor for SE. SE will decrease with the increase of the arrangement distance. With the sample arrangement distance, the SE of stainless steel blended yarn is similar with that of silver-plated fiber and bare copper wire, but better than that of stainless steel core spun yarn, pure stainless steel filaments and doubling twist yarn samples. The SEs of samples with parallel and grid arrangement are the same when tested with shielded chamber. The laws above are suitable to the reflection coefficience.