Design of a multilayer wideband absorber based on frequency selective surface.

This paper presents a broadband absorber consisting of three frequency selective surfaces (FSS) layers. The FSS layers consist of four identical rectangles and two circular arcs, a prototype is fabricated, and measurements are performed in an anechoic chamber to validate the proposed design method. The consistency of the simulation and measurement results verifies the analysis and design principle. The simulation results show that the absorption of the proposed absorber is greater than 80% in the frequency range of 3.8–11.9 GHz, while the relative absorption bandwidth is 103%. Meanwhile, the absorption of TE and TM waves hardly changes when the incident angle rises to 25°. [ABSTRACT FROM AUTHOR]