3D ultra-wideband high selective bandpass FSS

A new 3D ultra-wideband high selective bandpass frequency selective surface is presented in this paper. Interleaved subwavelength metal frames produce multiple transmission poles, leading to a sharp roll-offs at the edge of passband. The simulation results show that the FSS can achieve 11.8GHz band-width, covering the ultra-wide band from 6GHz to 18GHz. A large Rectangular coefficient indicates the FSS has high frequency selectivity and good suppression ability of the passband to the stopband.