Design of 0.34 THz bandpass filter based on frequency selective surface
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摘要: 为满足太赫兹通信的需求,基于薄膜工艺和双层级联的结构,设计了一种0.34 THz频率选择表面带通滤波器。利用等效电路模型分析了该滤波器的频率特性,通过仿真研究了入射角对该结构频率特性的影响,显示水平极化条件下其在低于45入射角范围内具有较好的性能。最终按照所评估的误差容忍度加工了Jerusalem 十字单元的频率选择表面样片,并进行了频率传输特性的测试与分析,结果表明:该滤波器具有较好的滤波特性。Abstract: In order to meet the requirement of THz communication, a 0.34 THz bandpass filter was designed based on thinfilm processing and double screen frequency selective surface(FSS). The frequency characteristics of the FSS filter were analyzed by using the equivalent circuit model and the influence of incident angles on the frequency response characteristics of the designed FSS filter was investigated by simulation. The results show that a better frequency response can be obtained at all the angles below 45 with TE polarization. Finally, a sample of the FSS filter was produced, tested and analyzed. The results indicate that this FSS filter has a good performance.
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Key words:
- terahertz /
- frequency selective surface /
- bandpass filter
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