ANALYSIS OF PYRAMID EM WAVE ABSORBER BY FDTD METHOD AND COMPARING WITH CAPACITANCE AND HOMOGENIZATION METHODS

Abstract

In this paper, we model an array of pyramid electromag- netic wave absorbers and calculate the return loss of this array using the FDTD method. For modeling the frequency dependent of the ab- sorber, the Debye model is used. In doing so, a 3 × 3structure of nine pyramid absorber is chosen instead of the array. The results are compared with capacitance and homogenization methods using aver- age values for ε [10]. The results clearly show that the FDTD is an accurate method for calculating the return loss of an array of pyramid absorbers as compared with three other existing methods, and can be used to simulate the array of pyramid absorbers with different sizes in a wide range of frequencies.