Low-Loss Spoof Surface Plasmon Slow-Wave Transmission Lines With Compact Transition and High Isolation
Low-Loss Spoof Surface Plasmon Slow-Wave Transmission Lines With Compact Transition and High Isolation
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DOI：
10.1109/tmtt.2016.2604807
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发表时间：
2016-10-01
影响因子：
4.3
通讯作者：
Qiu, Cheng-Wei
中科院分区：
文献类型：
--
作者：
Kianinejad, Amin;Chen, Zhi Ning;Qiu, Cheng-Wei
提出并研究了基于对称欺骗表面等离子体（SSP）的慢波传输线（SW-TL），该传输线具有紧凑的过渡、低欧姆损耗和SW-TL之间的低串扰。首先，SSP 单元通过等效电路元件进行建模。所提出的等效电路模型对于 SW-TL 与其他微波电路的集成很有吸引力。由于具有对称性，SW-TL 很容易通过紧凑型模式转换器实现，提供从导波到欺骗微波等离子体激元的渐变阻抗、动量和偏振匹配。然后，仿真研究和实验验证了所提出的 SSP SW-TL 的欧姆损耗仅为传统同类产品的一半。之后，所提出的 SSP SW-TL 之间的低互耦合得到了数值和实验的证实，并显示比传统微带 TL 之间的互耦合低 10 dB。所提出的低损耗、高度隔离和紧凑的 SW-TL 以及可靠的电路模型使得能够在微波技术中进一步开发有前途的欺骗等离子体激元模式。
The symmetric spoof surface plasmon (SSP)-based slow-wave transmission line (SW-TL) with compact transition, low ohmic loss, and low crosstalk between SW-TLs is proposed and investigated. First, the SSP cells are modeled by equivalent circuit elements. The proposed equivalent circuit model is appealing for the integration of SW-TLs with other microwave circuits. With the symmetricity, the SW-TLs are readily realized by a compact mode converter providing gradual impedance, momentum, and polarization matching from guided waves to spoof microwave plasmons. Then, simulation studies and experiments verify that the proposed SSP SW-TL features as low as half the ohmic loss of the traditional counterparts. After that, the low mutual coupling between the proposed SSP SW-TLs is numerically and experimentally substantiated and showed to be up to 10 dB lower than that between conventional microstrip TLs. The proposed low loss, highly isolated and compact SW-TL along with the reliable circuit model enables the further exploitation of promising spoof plasmon modes in microwave technology.