Continuous leaky-wave scanning using periodically modulated spoof plasmonic waveguide.
Continuous leaky-wave scanning using periodically modulated spoof plasmonic waveguide.
复制标题
使用周期性调制欺骗等离子体波导进行连续漏波扫描
DOI：
10.1038/srep29600
复制
发表时间：
2016-07-12
影响因子：
4.6
通讯作者：
Cui TJ
中科院分区：
文献类型：
--
作者：
Kong GS;Ma HF;Cai BG;Cui TJ
由均匀波纹金属条制成的等离子体波导可以支持和引导高约束的欺骗表面等离子体激元（SSPP）。在这里，我们提出了由非均匀波纹金属条组成的经调制的等离子体激元波导，以将SSPP转换为辐射波，其中辐射的主光束可以随着频率的变化而连续地转向。为了提高等离子体激元波导在宽边的辐射效率，进一步提出了一种非对称等离子体激元波导，以减少反射，实现连续漏波扫描。数值模拟和实验结果表明，该方法可以大大提高漏波天线的辐射效率，使漏波辐射主波束从后象限转向前象限，通过宽边方向，这是普通漏波天线难以实现的。
The plasmonic waveguide made of uniform corrugated metallic strip can support and guide spoof surface plasmon polaritons (SSPPs) with high confinements. Here, we propose periodically-modulated plasmonic waveguide composed of non-uniform corrugated metallic strip to convert SSPPs to radiating waves, in which the main beam of radiations can steer continuously as the frequency changes. To increase the radiation efficiency of the periodically-modulated plasmonic waveguide at the broadside, an asymmetrical plasmonic waveguide is further presented to reduce the reflections and realize continuous leaky-wave scanning. Both numerical simulations and experimental results show that the radiation efficiency can be improved greatly and the main beam of leaky-wave radiations can steer from the backward quadrant to the forward quadrant, passing through the broadside direction, which generally is difficult to be realized by the common leaky-wave antennas.