Preparation and Characterization of Pyramidal-shaped EM-wave Absorbers Produced by Smoked Roof-tile Process

Abstract

EM-wave absorbers were prepared by a smoked roof-tile process. The shape of the absorbers was in pyramidal form, where the height was adjusted in the range of 100 to 200 mm. The roof-tile process produced a carbon-coated surface layer on the pyramidal-shaped substrate, which exhibited good electrical conductivity and led to good EM-wave absorption in the microwave frequency range. It is possible to adjust the center frequency of the absorption by changing the height of the pyramid. In addition, the absorbers exhibited strong resistance to high-power incident EM-waves, and the environmental stability in ambient atmosphere is expected.