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A Dual-Band Sine-Square FSS Design

Ferreira, D. ; Cuinas, I. ; Caldeirinha, Rafael ; Fernandes, T.

A Dual-Band Sine-Square FSS Design, Proc European Conf. on Antennas & Propagation - EUCAP, Davos, Switzerland, Vol. 1, pp. 1 - 5, April, 2016.

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Abstract
This paper proposes a new frequency selective surface (FSS) based on the combination of four sinusoidal-waveform like shapes, each formed by the combination of two semi-circles, for an overall arrangement similar to a square shape. The proposed design was simulated and evaluated through a commercial electromagnetic (EM) simulation software. The sine-square FSS has a relatively simple design, yet provides a dual band frequency response, with narrow bandwidths compared to classical designs, and with a relatively stable angular behavior of up to at least 45º. It was shown that the second resonance frequency can, within a limited range, be independently controlled from the first resonance frequency band. Both band reject and band pass variants, as well as possible active/tunable implementations of this FSS design, were evaluated and are discussed in this paper.