A novel broadband terahertz filter for photonic crystal
A novel broadband terahertz filter for photonic crystal
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DOI：
10.1080/09500340.2016.1167978
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发表时间：
2016-03
影响因子：
1.3
通讯作者：
Yuan Luo;Yanyan Li;Zhangfang Hu;Jinlan Liu
中科院分区：
文献类型：
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作者：
Yuan Luo;Yanyan Li;Zhangfang Hu;Jinlan Liu
研究了线波导中点缺陷柱、散射介质柱、两侧介质柱半径的变化对S参数的影响。根据微腔与波导的谐振耦合原理，设计了一种新型宽带太赫兹滤波器。该滤波器是在谐振微腔中引入散射介质柱，点缺陷柱由碲化汞材料构成，并通过调整线波导两侧介质柱的半径来实现的。结果表明，该天线的3dB带宽达到74.2GHz，回波损耗小于-12.02dB，带内最大插入损耗为0.35dB，降频效率达到96.79%。这种新型太赫兹滤波器具有通带平坦、带外抑制尖锐的特点，其中心频率为0.338THz。良好的性能表明，它可以满足太赫兹大气通信I窗口高速、宽带的要求。
Abstract The influence of the change of the radius of point defect cylinders, scattering dielectric cylinders, dielectric cylinders on both sides of line waveguide on S parameter is studied. According to the resonant coupling principle between micro-cavity and waveguide, a novel broadband terahertz filter is designed. The novel filter is formed by introducing scattering dielectric cylinders into the resonant microcavity, and the point defect cylinders are composed of HgTe material and adjusting the radius of dielectric cylinders on both sides of line waveguide. Results show that the 3 dB bandwidth reaches 74.2 GHz, the return loss is less than −12.02 dB, the maximum insertion loss in-band reaches 0.35 dB and its drop efficiency is up to 96.79%. The novel terahertz filter has flat passband, sharp rejections at out-bands and its central frequency is 0.338THz. The good performances show that it can meet the requirements of high speed and broadband in terahertz atmosphere communication I window.