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Dual-band microwave absorption properties of metamaterial absorber composed of split ring resonator on carbonyl iron powder composites

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Abstract

This study investigated the dual-band absorption properties of metamaterial absorbers composed of a split ring resonator (SRR) on a grounded magnetic substrate. Polymer composites of carbonyl iron powders (CIP) of high permeability and magnetic loss were used as the substrate material. Computational tools were used to model the interaction between electromagnetic waves and materials with the SRR structure. For perpendicular polarization with an electric field (E) perpendicular to the SRR gap, dualband absorption peaks are predicted in the simulation result of reflection loss. Magnetic resonance resulting from antiparallel currents between the SRR and the ground plane is observed at the frequencies of two absorption peaks. The first strong absorption peak at the lower frequency (3.3 GHz) is due to magnetic resonance at the wire part of the SRR. The second absorption peak at the higher frequency (7.2 GHz) is due to magnetic resonance at the SRR split gap. The decreased capacitance with increased gap spacing moves the second absorption frequency to higher frequencies, while the first absorption peak is invariant with gap spacing. In the case of dual gaps at the opposite sides of the SRR, a single absorption peak is predicted due to the elimination of low-frequency resonance. For parallel polarization with the E-field parallel to the SRR gap, a single absorption peak is predicted, corresponding to magnetic resonance at the SRR wire.

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Authors and Affiliations

  1. Department of Advanced Materials Engineering, Chungbuk National University, Cheongju, 361-763, Korea

    Jun-Hee Lim, Yo-Han Ryu & Sung-Soo Kim

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  1. Jun-Hee Lim
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  2. Yo-Han Ryu
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  3. Sung-Soo Kim
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Correspondence to Sung-Soo Kim.

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Lim, JH., Ryu, YH. & Kim, SS. Dual-band microwave absorption properties of metamaterial absorber composed of split ring resonator on carbonyl iron powder composites. Electron. Mater. Lett. 11, 447–451 (2015). https://doi.org/10.1007/s13391-015-4358-9

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  • DOI: https://doi.org/10.1007/s13391-015-4358-9

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