The invention relates to a frequency selective surface structure with wide
passband and ultra-wide
stopband. The frequency
selective surface structure comprises a fine square ring array layer, a spiral
meander line array layer and a thick square ring array layer, wherein the fine square ring array layer is etched on an upper surface inner side
dielectric plate, the spiral
meander line array layer is etched on an intermediate
metal layer lower side
dielectric plate, the thick square ring array layer is etched on a lower surface outer side
dielectric plate, an upper side foam material interlayer is further arranged between the upper surface inner side
dielectric plate and the intermediate
metal layer lower side
dielectric plate, and a lower side foam material interlayer is further arranged between the intermediate
metal layer lower side
dielectric plate and the lower surface outer side dielectric plate. The frequency
selective surface structure has the advantages of
small unit size, small thickness,
low transmission loss, wide
passband, good out-of-
band rejection, further has the beneficial effects of ultra-wide
stopband, wide electromagnetic wave scanning angular domain and stable scanning along
azimuth angle of
frequency response, and can be widely applied to antenna
housing design in platforms such as radars,
satellite communication and aircrafts.