Compact Feeding Network for Array Radiations of Spoof Surface Plasmon Polaritons.
Compact Feeding Network for Array Radiations of Spoof Surface Plasmon Polaritons.
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用于欺骗表面等离子体激元阵列辐射的紧凑馈电网络
DOI：
10.1038/srep22692
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发表时间：
2016-03-07
影响因子：
4.6
通讯作者：
Cui TJ
中科院分区：
文献类型：
--
作者：
Xu JJ;Yin JY;Zhang HC;Cui TJ
提出了一种用于表面等离子体激元阵列辐射的分束器馈电网络。根据耦合模理论，在一定频率范围内沿单个波导沿着传播的SPP场可以很容易地耦合到具有相同传播常数的两个相邻分支波导中。我们建议在两个分支波导的末端反对称地加载U形粒子，从而显示出馈电网络的高集成度。通过控制U形粒子链产生的线性相位调制，我们从理论和实验上证明了基于束缚模的SPP场可以有效地沿宽边方向辐射到远场。所提出的方法表明，电磁场模式的对称性，可以利用SPP传输网络，提供潜在的解决方案，紧凑的功率分配器和组合器的微波和光学设备和系统。
We propose a splitter feeding network for array radiations of spoof surface plasmon polaritons (SPPs), which are guided by ultrathin corrugated metallic strips. Based on the coupled mode theory, SPP fields along a single waveguide in a certain frequency range can be readily coupled into two adjacent branch waveguides with the same propagation constants. We propose to load U-shaped particles anti-symmetrically at the ends of such two branch waveguides, showing a high integration degree of the feeding network. By controlling linear phase modulations produced by the U-shaped particle chain, we demonstrate theoretically and experimentally that the SPP fields based on bound modes can be efficiently radiated to far fields in broadside direction. The proposed method shows that the symmetry of electromagnetic field modes can be exploited to the SPP transmission network, providing potential solutions to compact power dividers and combiners for microwave and optical devices and systems.