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Effective equivalent circuits are used for the prediction of resonant and absorbing behavior of cut-wire-based (CW-based) metamaterials. Firstly, an equivalent circuit applicable to electric resonance frequencies of single CW metamaterial arrays is considered. Secondly, the equivalent circuit is extended for prediction of magnetic resonance frequencies of symmetrically paired CW metamaterial arrays and asymmetrically paired CW metamaterial arrays. Finally, since the magnetic resonance of the symmetrically paired CW arrays is analogous to the resonance of the CW metamaterial absorbers, i.e., absorbing behavior of the absorbers, the absorptance peak frequencies of CW metamaterial absorbers are estimated. Close agreement is obtained with numerically obtained values, the difference being typically 4, 6, 4, and 2% for the single CW, symmetrically paired CW, asymmetrically paired CW metamaterials and CW metamaterial absorbers, respectively. The paper concludes with discussions pointing out differences with a previous equivalent circuit and improvements to the proposed equivalent circuits.
Date of Publication: Aug. 2012