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Applications of Split-Ring Resonances on Multi-Band Frequency Selective Surfaces

Multi-band frequency selective surfaces (FSSs) are proposed by utilizing the split-ring resonators (SRRs) as the basic unit cells. The magnetic resonance of SRRs, which makes an additional dip in the reflection and transmission spectrums of FSSs, is discussed based on the equivalent circuit method and the simulation models. Because of the electric and the magnetic resonances of the single SRR as well as the coupling between periodically arrayed SRRs, the multi-band properties of FSSs are realized. Finally, the dependence of the geometrical parameters of SRRs on the resonance frequencies of FSSs is investigated.