Oblique incidence-insensitive metamaterial absorber using strong magnetic coupling resonance for low-frequency microwave absorption

Wentao YangSchool of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, People’s Republic of China

Xi ZengSchool of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, People’s Republic of China

Lei ZhengSchool of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, People’s Republic of China

https://orcid.org/0000-0002-7016-6423

Xian WangSchool of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, People’s Republic of ChinaCorrespondence[email protected]

Rongzhou GongSchool of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, People’s Republic of China

Abstract

In this work, we presented an oblique incidence-insensitive metamaterial absorber (MA) based on the strong magnetic coupling resonance using the printed circuit board process, and the spacer is produced by a typical magnetic absorber material (MAM). As for reflection loss (RL) at oblique angles, it can achieve high-efficiency absorption for both transverse-electric (TE) and transverse-magnetic (TM) polarizations with a wide angular range from 0° to 60° in the low frequency of 2.33 GHz to 3.44 GHz. In addition, the magnetic coupling mechanism of the metamaterial absorber was deeply analyzed. Comparing the results of the simulation and experiment, it displays excellent absorption performance of the proposed absorber in TE and TM modes under large oblique incidence angles.

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Oblique incidence-insensitive metamaterial absorber using strong magnetic coupling resonance for low-frequency microwave absorption

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Oblique incidence-insensitive metamaterial absorber using strong magnetic coupling resonance for low-frequency microwave absorption

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