Metapaper: A frequency selective surface wallpaper for the attenuation of Wi-Fi signals

This paper presents a wallpaper filtering electromagnetic waves used in Wi-Fi transmissions. It is made of a frequency selective surface (FSS) printed on a paper substrate. The printing of conductive inks is done using industrial printing techniques. The FSS shows attenuation better than 25 dB for the first Wi-Fi band and better than 24 dB for the second one. The FSS pattern designed for this purpose is insensitive to the polarization and to the incidence angle of the electromagnetic waves up to ±60°.