A Dual Polarized Super-Wideband Frequency Selective Surface with Equivalent Circuit Model

A new single layered Frequency Selective Surface (FSS) with very simple unit cell geometry is proposed in this work. The FSS unit cell is composed of square patch with symmetric square slots in a 4×4 array to cover the super wideband (SWB) from 3.1 GHz to 34.78 GHz (11.22:1) that equivalents fractional bandwidth of 167.26%. The unit cell dimension of the FSS is 0.165λ
L
×0.165λ
L
only where λ
L
means the lower cut off frequency of FSS spectrum. The proposed FSS is having bandwidth to dimension ratio 6143.62 and offers similar responses in both the TE & TM modes of polarization. The working band of proposed FSS covers commercial ultra-wideband, WiMAX, ISM bands, WLAN bands, S-C-X-Ku-Ka bands, and 5G NR bands which makes it useful for many present and futuristic wireless communication technologies.