Research on Terahertz Band-stop Filter based on Circular Quasi-periodic Waveguide

Xinyu Zhao; Lanlan Xu; Hongwei Ding; She Li

doi:10.6919/ICJE.202605_12(5).0016

Authors

Xinyu Zhao
Lanlan Xu
Hongwei Ding
She Li

DOI:

https://doi.org/10.6919/ICJE.202605_12(5).0016

Keywords:

Terahertz; Band-stop Filter; Quasi-periodic; Waveguide.

Abstract

The terahertz filtering behavior of quasi-periodic waveguide based Fibonacci sequence is investigated by finite element research method. The long-range order of quasi-periodic waveguide has achieved the functions of band-stop and narrow band filter. The waveguide generation can directly influence the number of bandgaps. Periodic processing can enable low generation waveguides to have the band-stop filtering function, too. The length ratio can be used to regulate the number of forbidden bands, operating frequency and bandwidth. The maximum bandwidth of a single bandgap is 192 GHz. The total operating frequency of a single waveguide can reach up to 281 GHz. The 8th generation waveguide also realizes narrow band filtering function with a bandwidth of 14 GHz. Quasi-periodic waveguides can provide new ideas for the design of terahertz filters.

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