Design of Bandstop Frequency-Selective Structure Based on Corrugated Structure

In this paper, we propose a novel design of bandstop frequency-selective structure with ultra-wide stopband based on corrugated structure. The proposed three-dimensional (3-D) structure is a periodic structure composed of narrow metal strip lines printed on regular triangular prisms. The effects of structural parameters on stopband performance are investigated. The simulation results show that the -10 dB fractional bandwidth (FBW) of stopband is 80%, and the angular stability of the structural response is up to 60 degrees for both TE and TM polarization. Moreover, the period of the corrugated structure is 0.2λ, and the thickness along the wave propagation is 0.26λ.