A novel Frequency Selective Surface with compact structure and stable responses

A novel bandstop Frequency Selective Surface (FSS) using octagonal fractal structures is presented in this paper. By bending the edges inside and outside, the cell perimeter of the FSS can be effectively elongated, and therefore miniaturize the resonant frequency. And because of the symmetry configuration, the proposed FSS has achieved excellent stability for different polarizations and incident angles. In addition, the miniaturization performance can be further improved by changing the position and number of the inside loops. Each transmission performance is examined by simulation.