Design and Characterization of a Dual-Band Metamaterial Absorber Based on Destructive Interferences

Abstract

Abstract-We present the design, characterization, and experimental verification of a dual-band metamaterial absorber (MA) in the microwave frequencies. The proposed MA consists of a metallic gammadion-shaped structure and a complete metal layer, separated by a dielectric spacer. The results show that the proposed MA has two absorption peaks at nearly 5.6 GHz and 6 GHz with absorption rates of 97% and 99%, respectively. The interference theory is used to investigate the physical mechanism of the proposed MA. The experimental results are in good agreement with the theoretical predictions. Furthermore, it is verified by simulations that the absorption of the proposed MA is almost insensitive to the incident wave polarization and oblique incident angle for the both TM and TE modes. This MA has broad prospect of potential applications.

Design and analysis of a compact ultrathin polarization‐ and incident angle‐independent triple band metamaterial absorber

“…In addition to the single band, dualband and multiband absorbers are reported by researchers. In line of this, Jamilan et al and Kaur et al, presented a dual‐band metamaterial absorber but the size of unit cell is extremely large. Moreover, absorber reported in Reference , fulfills the demand of compact size, however equivalent circuit modeling of the absorber for better insight of the design is not illustrated.…”

“…Subsequently, equivalent circuit model of the proposed absorber is drawn with the help of surface current distributions and electric field distributions. The comparison between proposed absorber and other available designs in References are given in Table . From Table 1, it is confirmed that the proposed design in very prominent structure in terms of size, thickness, high peak absorption, and ease of fabrication.…”

“…6 Nowadays, microwave absorbers have been extensively investigated from few gigahertz to optical frequency ranges for various potential applications. In the past few years, significant research has been carried out in the design of single band, 7 dual band, [8][9][10] and multiband. [11][12][13][14][15][16] Author Dincer et al 7 analyzed the properties of single band absorber theoretically, numerically, and experimentally.…”

A Dual-Band Compact Metamaterial Absorber with Fractal Geometry

“…In this paper, an ultra-thin fractal MA cell, first illustrated by the authors in Reference [9], is presented for dual-band operation within the UHF range. Even if other dual-band/multi-band MA configurations can be found in literature [10][11][12][13][14][15][16][17], this is the first example working at UHF frequencies.…”

“…Unlike other multi-band MAs [10][11][12][13][14][15][16][17], the proposed fractal MA-cell allows to achieve closer absorbing peaks. Furthermore, the adopted single-layer structure offers reduced thickness ( λ/107) and very small unit cells ( 0.4λ), with λ being the free-space wavelength at the smaller resonant frequency.…”