论文部分内容阅读
基于频率选择表面中方形环与槽,设计了单面半环半槽的新型太赫兹滤波器.运用等效电路法对滤波器的频率响应特性进行了理论分析并进行数值仿真.结果表明:该单面互补结构具有双频带阻的滤波特性,中心频率分别为0.4406THz、0.7942THz,透过率分别为0.549%、0.909%,带内抑制佳,最大衰减分别达到38.74dB、38.59dB,在入射角为±30°范围内具有稳定的频率响应特性,通过改变结构参数可以使双阻带中心频率独立可控.与单环或单槽结构相比,该滤波器单面互补结构能够产生更多谐振频带的特点,为多频带传感器,太赫兹通信技术提供了理论基础.
Based on the square rings and grooves in the frequency selective surface, a new type of THz filter with single half-ring half-slot is designed. The equivalent circuit method is used to analyze the frequency response characteristics of the filter and the numerical simulation results show that The single-sided complementary structure has the filtering characteristics of dual-band impedances. The center frequencies are 0.4406 THz and 0.7942 THz respectively. The transmittances are 0.549% and 0.909%, respectively. The in-band rejection is good and the maximum attenuation is 38.74 dB and 38.59 dB respectively. With a stable frequency response of ± 30 °, the double stopband center frequency can be controlled independently by changing the structure parameters. Compared with a single-ring or single-slot structure, the single-sided complementary structure of the filter can generate more The characteristics of the resonant frequency band provide the theoretical basis for multi-band sensor and terahertz communication technology.