Asymmetric three-dimensional metamaterial absorber for microwave application

2022 International Applied Computational Electromagnetics Society Symposium (ACES-China)(2022)

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Abstract
In this paper, an asymmetric three-dimensional metamaterial absorber (3D-MA) for microwave application is presented. The designed 3D-MA is composed of a hollow vertical periodic crossed mesh array. Two metal split ring resonators (SRRs) of different sizes are printed on the substrate. The asymmetric mechanism is deeply analyzed and discussed from the perspective of the equivalent circuit. The final simulation results show that the designed 3D-MA can achieve broadband absorption with absorptivity over 80% in the frequency range of 1.84-2.8 GHz and 2.9-3.72 GHz when the electromagnetic wave is incident along the z direction. However, when the electromagnetic wave is incident from the reverse side, the incoming energy is near-total reflected. The calculated results of the equivalent circuit model agree well with the electromagnetic simulation results. The designed 3D-MA has great potential applications in the field of radar asymmetric recognition, detection, and stealth.
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Key words
three-dimensional metamaterial absorber,split ring resonators,equivalent circuit model,radar asymmetric recognition
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