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The frequency selective surface (FSS) with ultra-wide passband performance and a sharp rejection near the side of the passband is investigated in this paper. The proposed cascaded FSS consists of a 2-D periodic array of square loop aperture (SLA) and an array of bandstop square loop (SL) with different period. Under different incident waves, the proposed second-order FSS and third-order FSS provide...
In order to accurately predict the frequency selective surface (FSS) characteristics in wide band, an improved equivalent circuit model for slot FSS is proposed. Based on modal decomposition equivalent circuit method (MDECM), higher-order waveguide modes have been taken into account for approximating the FSS element aperture field. Taking rectangular slot FSS as example, the ratio of the transformers...
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