Analysis of multiple wedges electromagnetic wave absorbers

Abstract

To improve the re∞ection performance of absorbers used in anechoic chambers, several difierent electromagnetic wave absorber geometries similar to conventional wedge absorber structures are proposed in this study. Design basics are examined by using the re∞ection and absorption of electromagnetic waves. The return loss characteristics of each absorber structure which is illuminated by a TE polarized plane wave have been obtained using well-known simulation software for several incidence angles. Comparisons of the simulation results of the conventional wedge and proposed absorbers are presented. The results show that new absorber shapes provide better absorption characteristics than a conventional wedge across almost all frequency ranges especially for normal and near normal incidence cases.