A Study on Reflectivity of an One Layered Type Wave Absorber for Near and Far Field

Abstract

In this paper, the spatial distribution of the reflectivity of an one layered type wave absorber is analyzed by using FDTD method. The reflectivity from the near field to the far field is examined in the case of changing the distance from the surface of the absorber and the size of it. As a result, it is confirmed that the tendency of the reflectivity converges to a steady value in the far field though it shows intricate behavior in the near field. Moreover, the reflectivity is decreased and the difference between the near field and the far field is increased as the size of the absorber becomes smaller.