Xu Jun Jun, Yin Jia Yuan, Zhang Hao Chi, Cui Tie Jun
State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China.
Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing, 210096, China.
Sci Rep. 2016 Mar 7;6:22692. doi: 10.1038/srep22692.
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.
我们提出了一种用于超表面表面等离激元极化激元（SPP）阵列辐射的功分馈电网络，该网络由超薄波纹金属条引导。基于耦合模理论，在特定频率范围内，沿单个波导的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。我们建议在这两个分支波导的末端反对称加载U形粒子，这显示了馈电网络的高度集成度。通过控制U形粒子链产生的线性相位调制，我们在理论和实验上证明了基于束缚模的SPP场可以在宽边方向有效地辐射到远场。所提出的方法表明，可以利用电磁场模式的对称性来设计SPP传输网络，为微波和光学器件及系统的紧凑型功率分配器和合成器提供了潜在的解决方案。
