Design of A Wave-Absorbing Frequency Selective Surface Unit

In this paper, a wave-absorbing frequency selective surface (AFSS) with low frequency transmission/high frequency absorption is proposed. By reducing the RCS of the antenna system without affecting the radiation performance, the radar stealth effect can be improved. This unit adopts the method of proportionally loading the frequency selection structure on the metal reflection surface of the absorber unit, so that it has a frequency selection function without affecting the effect of the microwave absorption.