Research of the resonant pyramid microwave absorber based on carbon coated EPS particles

Abstract

In this paper, a resonant pyramid microwave absorber with EPS particles (the particles of Expanded Polystyrene) as the base material was studied. Its wave absorbing property was tested experimentally and the cut-off frequency and cut-off wavelength of the absorber were deduced. The findings show that when the content of carbon black (CB) is 4%vol. and the height of pyramid is 600mm, the wave absorbing property of the absorber can reach its optimal value, which is below -40dB in the frequency range 2.6 ∼ 18GHz.