Single-conductor co-planar quasi-symmetry unequal power divider based on spoof surface plasmon polaritons of bow-tie cells
Single-conductor co-planar quasi-symmetry unequal power divider based on spoof surface plasmon polaritons of bow-tie cells
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DOI：
10.1063/1.4966051
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发表时间：
2016-10
期刊：
影响因子：
1.6
通讯作者：
Yongle Wu;Mingxing Li;Guangyou Yan;L. Deng;Yuan’an Liu;Zabih Ghassemlooy
中科院分区：
文献类型：
--
作者：
Yongle Wu;Mingxing Li;Guangyou Yan;L. Deng;Yuan’an Liu;Zabih Ghassemlooy
提出了一种周期槽型领结电池的假表面等离子体激元传输线。利用广义有耗微带理论的分析方法，提取了SSPP、TLS和微带线(MLS)的复传输常数和特性阻抗。实验研究了不同衬底、相同几何构型的SSPPS热释光的特性。然后，为了进行比较，还对两个ML对应体进行了实验，结果表明，在截止频率以下，SSPPS TL对所选衬底的厚度、介电常数和损耗正切的敏感度要比ML对的低。提出了一种基于该SSPPS TL的微波单导体共面准对称不等功分器。为了进行实验验证，设计、制造和测量了0-分贝、2-分贝和5-分贝功分器。仿真和测量结果都证明了不等功率分配器是一种灵活的选择，它具有单导体共面准对称结构、宽带工作以及不同功分比的方便实现等诸多优点。因此，可以预期，所提出的不等功率分配器将启发对SSPP的进一步研究，从而为未来新型平面无源和有源微波元件、电路和系统的设计提供参考。
In this paper, the spoof surface plasmon polaritons (SSPPs) transmission line (TL) of periodical grooved bow-tie cells is proposed. The complex propagation constant and characteristic impedance of the SSPPs TLs and microstrip lines (MLs) are extracted using the analytical method of generalized lossy TL theory. The properties of the SSPPs TLs with different substrates and the same geometrical configuration are experimented. Then, for comparison, two ML counterparts are also experimented, which shows that the SSPPs TL is less sensitive to the thickness, dielectric constant and loss tangent of the chosen substrate below the cutoff frequency, compared with the ML ones. The single-conductor co-planar quasi-symmetry unequal power divider based on this SSPPs TL is presented in microwave frequencies. For experimental validation, the 0-dB, 2-dB, and 5-dB power dividers are designed, fabricated, and measured. Both simulated and measured results verify that the unequal power divider is a flexible option, which offers massive advantages including single-conductor co-planar quasi-symmetry structures, wide-band operation, and convenient implementations of different power-dividing ratios. Hence, it can be expected that the proposed unequal power dividers will inspire further researches on SSPPs for future design of novel planar passive and active microwave components, circuits and systems.