利用高ε介电粒子与自由空间阻抗匹配增强三维准各向同性超材料金属网导线的电感

IF 1.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
Takuya Yamaguchi, T. Ishiyama, T. Ueda, T. Itoh
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引用次数: 1

摘要

本文考虑在中心放置具有高ε介电体的类磁偶极子共振的立方体单元胞和具有负介电常数的金属网丝,在微波区构建三维准各向同性超材料。基本上,这种结构由于包含高ε材料而受到低波阻抗的影响。为了降低复合结构的有效介电常数,我们建议在金属网中插入额外的电感。对于沿导线插入的集总电感,对色散图和布洛赫阻抗进行了数值估计,并将其转换为有效介电常数和磁导率。数值模拟结果清楚地显示出在特定频率区域内几乎三维各向同性的传播特性和在左旋区域接近自由空间的布洛赫阻抗增强。在实际配置中,集总电感器被曲线形条带模式所取代。金属图案结构还实现了与自由空间匹配良好的增强布洛赫阻抗。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhancement of inductance along metallic mesh wires in three-dimensional quasi-isotropic metamaterials using high-ε dielectric particles for impedance-matching with free space
In this paper, we consider cube-shaped unit cells including high-ε dielectric cubes under magnetic dipole-like resonance placed at the center and metallic mesh wires for negative permittivity to construct three-dimensional quasi-isotropic metamaterials in the microwave region. Basically, such structures suffer from their low wave impedance due to inclusion of high-ε materials. To reduce effective permittivity of the composite structures, we propose to insert additional inductance into the metallic mesh. For the insertion of lumped inductors along the wires, dispersion diagram and the Bloch-impedance are numerically estimated, and converted to effective permittivity and permeability. The numerical simulation results clearly show almost 3-D isotropic propagation characteristics in a specific frequency region and enhancement of the Bloch-impedance close to free space in the left-handed region. The lumped inductors are replaced by meander-line strip patterns for practical configurations. The metallic patterned structures also achieve the enhanced Bloch impedance that is well-matched to free space.
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来源期刊
EPJ Applied Metamaterials
EPJ Applied Metamaterials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
3.10
自引率
6.20%
发文量
16
审稿时长
8 weeks
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