ANALYSIS OF THE PYRAMID ELECTROMAGNETIC-WAVE ABSORBER - AN APPROXIMATED MODEL AND ITS APPLICATION OF TE WAVE

No detailed analysis has been available on the return loss characteris tics of a pyramidal electromagnetic wave absorber. Therefore, an appro ximate analysis method for the pyramidal absorber has not been establi shed in a rigorous sense. In this paper, the return loss characteristi cs for the normal incident on the pyramidal absorber are derived by th e numerical simulation based on the spatial network method. Also, as a n approximate method for the wave absorber that can approximate the ob tained results well, a method called the synthesized capacitance model is proposed. By comparison of the numerical results by the two method s, it is found that the approximate results by the synthesized capacit ance model provide more accurate results than those by the previous ap proximate models. Further, by means of the synthesized capacitance mod el for the normal incidence, the oblique incidence characteristics of the TE wave were computed and the results agreed well with the measure d data.