A Compact Novel Frequency Selective Surface in X and Ku Bands Applications

In this paper, a new patch type small sized wideband frequency selective surface (FSS) is proposed. The FSS unit cell size is only 6×6 mm
²
which is designed on FR-4 epoxy substrate of thickness 0.8mm. The proposed FSS covers wideband spectrum from 8.1 to 16.1 GHz (66.15%) with reflection coefficient (
$S_{11}$
) near 0 dB and transmission coefficient (
$S_{21}$
) less than −;10 dB. With such small geometry and wideband coverage, the FSS is useful to work in the X band and Ku band while shielding the L, S and C bands for various wireless communication applications.