A miniaturized FSS based on tortuous structure design

Abstract

A miniaturized frequency selective surface (FSS) composed of wire grid and tortuous pattern of cross-dipole element has been proposed to realize a first-order band-pass response. Resonant frequency of the proposed FSS can be adjusted by changing tortuous factor of the cross-dipole element. Sharper one-side roll-off characteristic and better resonant frequency angular stability can be obtained by the proposed FSS with a larger tortuous factor. Also, by cascading the proposed FSS of different tortuous factors, a dual-band frequency filter property can be obtained. The proposed FSS is analyzed by equivalent circuit method and full-wave simulations.