摘要
设计了基于人工表面等离子体激元(spoof surface plasmon polaritons,spoof SPPs)的带通滤波器,在介质基板上覆上一层超薄金属铜,并将金属表面刻为周期波纹状金属条,同时结合马赫曾德尔干涉仪(Mach–Zehnder interferometer,MZI),将金属条设计为MZI结构,并对MZI的干涉臂设计了两个取向相反的金属条结构,构成滤波器耦合部分,分析了耦合间距以及耦合单元个数对带通滤波器带宽的影响并进行了仿真。结果表明,该滤波器具有–3 d B从4.8 GHz到8.3 GHz的带宽。基于人工等离子体激元的带通滤波器的设计为今后人工表面等离子体在微波行业的应用提供了思路。
The bandpass filter based on spoof surface plasmon polaritons(spoof SPPs) was designed, which was composed of dielectric substrate and thin metal film. Thin metal film was carved periodically corrugated metallic strip, and designed to MZI structure combined with Mach-Zehnder interferometer(MZI). The interfering arms of MZI were designed with two oppositely oriented corrugated metal strips. It was found that strip gaps and number of coupling cells of coupling part had great effect on the bandwidth of the filter. Simulation results show that the –3 d B bandwidth of the filter is from 4.8 GHz to 8.3 GHz. The bandpass filter based on spoof SPPs provides an idea for spoof SPPs filters in microwave industry.
出处
《电子元件与材料》
CAS
CSCD
2016年第2期43-46,共4页
Electronic Components And Materials