The continuous growth of the telecommunications has brought up more connectivity as well as interference, mainly electromagnetic. One way to reduce it is by employing metallic enclosure, however, there are sceneries where metal shielding is not practical due to his weight, rigidity and proneness to corrosion. Conductive polymer has become a promising material to overcome these issues. In this work, a review of the conductive polymers principles is realized as well as the development and evaluation of expanded polystyrene (EPS) doped with copper, zinc and graphite at 9.6 GHz is presented.