Hannan Saif, Islam Mohammad Tariqul, Almalki Sami H A, Faruque Mohammad Rashed Iqbal, M M Salaheldeen, Islam Md Shabiul
Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia (UKM), 43600, Bangi, Selangor, Malaysia.
Electrical Engineering Department, College of Engineering, University of Ha'il, Ha'il, 81481, Saudi Arabia.
Sci Rep. 2022 Mar 8;12(1):3740. doi: 10.1038/s41598-022-07824-x.
In this paper, a square enclosed split-maze shaped metamaterial absorber is proposed for X and Ku band wireless applications. Two square metal enclosures were introduced around the split-maze structure to make it rotational symmetric and thus insensitive to cross-polarization. The proposed absorber has shown maximum absorptions at 9.33 GHz, 12.83 GHz, 13.86 GHz, and 15.61 GHz with single negative value of permittivity. The absorber is insensitive to the incident angle of applied EM waves for normal and oblique incidence up to 180 degrees. In addition, it was proved co- & cross-polarization insensitive due to the symmetric structure of the patch. A comprehensive equivalent circuit analysis was done to explain the fundamental EM behaviour of the metamaterial structure, and the circuit outputs coincided with the simulation results. Finally, the metamaterial was measured for both unit cell, and the array after fabrication and simulation results were validated. The proposed MMA is suitable for wireless applications in devices, especially for sensing, EM energy harvesting, EM coupling reduction, and antenna gain enhancement purposes.
本文提出了一种用于X和Ku波段无线应用的方形封闭式分裂迷宫形超材料吸波器。在分裂迷宫结构周围引入了两个方形金属外壳，使其具有旋转对称性，从而对交叉极化不敏感。所提出的吸波器在9.33GHz、12.83GHz、13.86GHz和15.61GHz处表现出最大吸收，介电常数为单一负值。该吸波器对于高达180度的垂直和斜入射的外加电磁波入射角不敏感。此外，由于贴片的对称结构，证明了其对共极化和交叉极化不敏感。进行了全面的等效电路分析以解释超材料结构的基本电磁行为，并且电路输出与仿真结果一致。最后，对制造后的超材料单元和阵列进行了测量，并验证了仿真结果。所提出的超材料吸波器适用于设备中的无线应用，特别是用于传感、电磁能量收集、电磁耦合降低和天线增益增强目的。
