Kaneda Takumi, Ueda Tetsuya
Electrical Engineering and Electronics Department, Kyoto Institute of Technology, 1 Hashigami-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
Nanophotonics. 2022 Apr 7;11(9):2097-2106. doi: 10.1515/nanoph-2021-0783. eCollection 2022 Apr.
Dual-band composite right/left-handed transmission lines with the nonreciprocal phase shift approximately proportional to the operating frequency are proposed and demonstrated by using normally magnetized ferrite microstrip lines. The nonreciprocal phase shift can be dynamically controlled by changing the externally applied dc magnetic field. Dynamic change in the nonreciprocal phase gradient along the line enables us to realize dual-band and unidirectional beam-scanning leaky-wave antennas without suffering from frequency-dependent change in the beam direction. A prototype nonreciprocal metamaterial line using polycrystalline yttrium iron garnet was fabricated and measured for verification of our basic concept.
提出了一种双频复合左右手传输线，其非互易相移近似与工作频率成正比，并通过使用正常磁化的铁氧体微带线进行了演示。通过改变外部施加的直流磁场，可以动态控制非互易相移。沿传输线的非互易相位梯度的动态变化使我们能够实现双频和单向波束扫描漏波天线，而不会受到波束方向上与频率相关的变化的影响。制作并测量了一个使用多晶钇铁石榴石的非互易超材料传输线原型，以验证我们的基本概念。
