Progresses in metamaterials for advanced low-frequency perfect absorbers: a brief review

Do Thuy Chi, Bui Xuan Khuyen, Bui Son Tung, Vu Dinh Lam, Liang Yao Chen and YoungPak Lee

Journal of Electromagnetic Waves and Applications, 2020, vol. 34, issue 17, 2251-2265

Abstract: In recent years, the exotic capability of metamaterials to absorb perfectly electromagnetic wave has induced potentially many practical purposes, especially, the rapid growth of 5G/6G telecommunication systems. Therefore, the perfect metamaterial absorbers have been reduced in a fast way to several hundred times smaller than the working wavelength. However, it is still a big obstacle to obtain the real low-frequency perfect absorbers (LFPAs), since the absorption frequency and the physical size are two conflicting requirements. To overcome this limitation, we review rather briefly the existing optimization strategies for LFPAs, by which the merits of geometrical optimization and the hybridization with parasitic elements will be highlighted. In addition, to be more feasible in electronic devices, the studies on flexible LFPA are also mentioned. Especially, we focus on recent investigations, which use inkjet-printing as an advanced fabrication technique to create the cost-efficient, printable and flexible LFPA.

Date: 2020
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DOI: 10.1080/09205071.2020.1820385

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