Miniaturized frequency selective surface and broadband frequency selective surface design

This paper presents the results of our research in the field of frequency selective surface in recent years. Aiming at the traditional passive frequency selective surface (FSS) in this paper, we mainly do two aspects of research work, which is the research of the small frequency selective surface and the research of the ultra wide band frequency selective surface. The center frequency value of the miniaturized FSS is only 2.47GHz, and the relative size of the unit is only 0.0494λ×0.0494λ and. That is to say, the unit size is less than λ/20. Stop band for the double layer structure FSS we proposed is from 11.03 to 13.98 GHz, with a relative bandwidth 23.6%. Pass band for the three dimensional structure FSS we proposed is from 8.1 to 14.6GHz, with a relative bandwidth 57.3%. The miniaturized FSS structure and wide band FSS structure have high practical application value.