Frequency Selective Surface with Wide Passband and Stopband Performance Operating in L/S Band

Frequency selective surface (FSS) with wide passband and ultra-wide stopband performance is investigated in this paper. The proposed cascaded FSS consists of three metallic layers and multilayer dielectric substrates. A novel inductive layer with the shape of spiral meander line is proposed to synthesize a large inductance to increase the bandwidth of passband. The constituting elements in cascaded structure are non-resonant during the operation band, thus, high order modes are avoided effectively in a wide frequency range. Finally, a flat passband from 1.84 to 2.40 GHz (insertion loss less than 0.86 dB) and an ultra-wide reflection band of 25.1 GHz (transmission coefficients lower than -20 dB) are achieved. This proposed cascaded FSS is a promising candidate for the applications of spatial filter and anti-interference.