Analysis of dispersion characteristics in helically corrugated coaxial waveguides: a theoretical and comparative study
Helically corrugated waveguides are valuable for constructing high-performance gyrotron devices and high-power pulse compressors. This paper establishes a theoretical model to analyze the dispersion characteristics of helically corrugated coaxial waveguides, where the dispersion equations for solvin...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/adaa96 |
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| author | Ying Xin Lai An Yan Cheng Chen Wei Chao Kuang Shan Jin Wang |
| author_facet | Ying Xin Lai An Yan Cheng Chen Wei Chao Kuang Shan Jin Wang |
| author_sort | Ying Xin Lai |
| collection | DOAJ |
| description | Helically corrugated waveguides are valuable for constructing high-performance gyrotron devices and high-power pulse compressors. This paper establishes a theoretical model to analyze the dispersion characteristics of helically corrugated coaxial waveguides, where the dispersion equations for solving the propagation constants of coupled eigenmodes, as well as the detailed coupling coefficients for various mode combinations are provided. On this foundation, the dispersion characteristics of corrugated coaxial waveguides featuring single and dual helical surfaces were systematically analyzed and compared with those of helically corrugated cylindrical waveguides in the context of pulse compression application. The findings reveal that helically corrugated coaxial waveguides operating in TEM mode require fewer auxiliary components, exhibit a wider frequency range of monotonically decreasing group velocity, and have a larger dynamic range of group velocity changes; notably, the dispersion performance of the waveguides with dual corrugated conductors can even be manipulated by varying the initial phase difference between the inner and outer helical corrugations. These advantages contribute to a reduction in compressor’s length, an increase in compression ratio and energy efficiency, and an enhancement in applicability. |
| format | Article |
| id | doaj-art-1219abfe5ae34a419af585ee8ae3dc99 |
| institution | Kabale University |
| issn | 1367-2630 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj-art-1219abfe5ae34a419af585ee8ae3dc992025-01-24T13:56:29ZengIOP PublishingNew Journal of Physics1367-26302025-01-0127101301610.1088/1367-2630/adaa96Analysis of dispersion characteristics in helically corrugated coaxial waveguides: a theoretical and comparative studyYing Xin Lai0https://orcid.org/0000-0003-1369-2205An Yan1Cheng Chen2Wei Chao Kuang3https://orcid.org/0000-0003-4246-9280Shan Jin Wang4School of Electrical Engineering & Intelligentization, Dongguan University of Technology , Dongguan, Guangdong 523808, People’s Republic of ChinaSchool of Electrical Engineering & Intelligentization, Dongguan University of Technology , Dongguan, Guangdong 523808, People’s Republic of ChinaSchool of Electrical Engineering & Intelligentization, Dongguan University of Technology , Dongguan, Guangdong 523808, People’s Republic of ChinaSchool of Electrical Engineering & Intelligentization, Dongguan University of Technology , Dongguan, Guangdong 523808, People’s Republic of ChinaSchool of Electrical Engineering & Intelligentization, Dongguan University of Technology , Dongguan, Guangdong 523808, People’s Republic of ChinaHelically corrugated waveguides are valuable for constructing high-performance gyrotron devices and high-power pulse compressors. This paper establishes a theoretical model to analyze the dispersion characteristics of helically corrugated coaxial waveguides, where the dispersion equations for solving the propagation constants of coupled eigenmodes, as well as the detailed coupling coefficients for various mode combinations are provided. On this foundation, the dispersion characteristics of corrugated coaxial waveguides featuring single and dual helical surfaces were systematically analyzed and compared with those of helically corrugated cylindrical waveguides in the context of pulse compression application. The findings reveal that helically corrugated coaxial waveguides operating in TEM mode require fewer auxiliary components, exhibit a wider frequency range of monotonically decreasing group velocity, and have a larger dynamic range of group velocity changes; notably, the dispersion performance of the waveguides with dual corrugated conductors can even be manipulated by varying the initial phase difference between the inner and outer helical corrugations. These advantages contribute to a reduction in compressor’s length, an increase in compression ratio and energy efficiency, and an enhancement in applicability.https://doi.org/10.1088/1367-2630/adaa96corrugated coaxial waveguidehelical corrugationsdispersion structurecoupled-wave theorygroup velocity |
| spellingShingle | Ying Xin Lai An Yan Cheng Chen Wei Chao Kuang Shan Jin Wang Analysis of dispersion characteristics in helically corrugated coaxial waveguides: a theoretical and comparative study New Journal of Physics corrugated coaxial waveguide helical corrugations dispersion structure coupled-wave theory group velocity |
| title | Analysis of dispersion characteristics in helically corrugated coaxial waveguides: a theoretical and comparative study |
| title_full | Analysis of dispersion characteristics in helically corrugated coaxial waveguides: a theoretical and comparative study |
| title_fullStr | Analysis of dispersion characteristics in helically corrugated coaxial waveguides: a theoretical and comparative study |
| title_full_unstemmed | Analysis of dispersion characteristics in helically corrugated coaxial waveguides: a theoretical and comparative study |
| title_short | Analysis of dispersion characteristics in helically corrugated coaxial waveguides: a theoretical and comparative study |
| title_sort | analysis of dispersion characteristics in helically corrugated coaxial waveguides a theoretical and comparative study |
| topic | corrugated coaxial waveguide helical corrugations dispersion structure coupled-wave theory group velocity |
| url | https://doi.org/10.1088/1367-2630/adaa96 |
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