Glide Symmetry to Prevent the Lowest Stopband of Printed Corrugated Transmission Lines
Glide Symmetry to Prevent the Lowest Stopband of Printed Corrugated Transmission Lines
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DOI：
10.1109/lmwc.2018.2858228
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发表时间：
2018-09-01
影响因子：
3
通讯作者：
Quevedo-Teruel, O.
中科院分区：
文献类型：
--
作者：
Padilla, P.;Herran, L. F.;Quevedo-Teruel, O.
在这封信中，我们证明了可以通过使用滑动对称性来控制印刷双面平行带线的色散特性。滑动对称性是通过双面线的两个条带中的波纹引入的。我们证明，滑翔对称性消除了第一和第二传播模式之间的阻带，并产生更高的传播常数，保持其线性度以及基础引导技术的宽带性质。因此，滑移对称双面线可以设计成在超宽频率范围内具有高等效折射率。这些特殊的特性已经过数值和实验验证。最后，我们通过特定设计（具有滤波特性的滑动对称双面平行带状线）展示了该技术的可能性。潜在的应用是低色散漏波天线以及机电可调谐移相器和滤波器。
In this letter, we demonstrate that the dispersion properties of printed double-sided parallel-strip lines can be controlled by using glide symmetry. Glide symmetry is introduced in with corrugations in both strips of a double-sided line. We demonstrate that glide symmetry eliminates the stopband between first and second propagating modes and yields to a higher propagation constant, preserving its linearity, and the broadband nature of the underlying guiding technology. Thus, the glide-symmetric doublesided line can be designed to possess a high equivalent refractive index in an ultrawide range of frequencies. These exceptional properties have been numerically and experimentally validated. Finally, we demonstrate the possibilities of this technology with a specific design, a glide-symmetric double-sided parallel-strip line with filtering properties. Potential applications are low-dispersive leaky-wave antennas and electromechanical tunable phase shifters and filters.