The invention belongs to the technical field of a
microwave technology and an aircraft
stealth technology, and discloses a dual-band
wave absorption frequency
selective surface system, a design methodand an aircraft. The dual-band
wave absorption frequency
selective surface system is provided with a
dielectric support plate, resistant thin film square rings and a circular-groove frequency
selective surface, wherein the resistant thin film square rings are periodically arranged on an upper surface of the
dielectric support plate, the circular-groove frequency selective surface is arranged on alower surface of the
dielectric support plate and comprises a
dielectric plate and a
metal layer, the
metal layer is arranged on an upper surface of the
dielectric plate, the thickness of the
metal layer is not considered, and circular grooves are periodically formed in the metal layer. By the dual-band
wave absorption frequency selective surface
system, k-band wave transparent / dual-band wave absorption can be achieved, an array pattern is compact, and good stability is achieved under an
oblique incidence condition; the dual-band wave
absorption frequency selective surface system is simple instructure; compared with a multi-layer structure, the dual-band wave
absorption frequency selective surface system is only provided with the upper-layer resistant film, the intermediate-layer dielectric support plate and the lower-layer frequency selective surface, and is lighter and is lower in profile; and a
transition band between the wave transparent band and the wave
absorption band is small, and the wave
absorption effect is good.