S-parameters of flexible electromagnetic radiation shields with Fe-Ni system coating

The results of studies of 2.0−17.0 GHz frequency responses of S11 and S21 values of flexible electromagnetic radiation shields made of metallized polymer film, on the surface of which a coating of the Fe-Ni system is applied by electron beam evaporation, are presented. It has been experimentally established that an alloy in the Fe-Ni system containing 56 wt. % (~ 57 at. %) Fe and 44 wt. % (~ 43 at. %) Ni is azeotropic one. Such composition corresponds to the minimum temperature at which the total vapor pressure reaches 10 Pa. It has been determined that by applying of the Fe-Ni system coating with the specified content of components to the surface of a metallized polymer film, it is possible to reduce S11 value by a maximum of 5.0 dB and S21 value by a maximum of 6.7 dB in the frequency range of 2.0−17.0 GHz of this film.