A Switchable Absorption/Transmission Active Frequency Selective Surface

In this paper, a switchable absorption/transmission active frequency selective surface (AFSS) is presented. It is shown that the AFSS can realize two functions as an electromagnetic absorber and a transmission surface for both TE and TM modes. The proposed design mainly consists of two FSS structure layers with PIN diodes loaded and a dielectric layer. When the diodes are turned on and off, the incident wave can be transmitted and absorbed by AFSS in the frequency range of 9.5 GHz to 10.7 GHz, respectively. The absorptivity and transmittance of the AFSS structure are over 90% The proposed work can be applied in the intelligent radome in future.