Investigation of angular log-periodic folded groove waveguide slow-wave structure for low voltage Ka-band TWT
In this paper, a novel angular log-periodic folded groove waveguide (ALFGW) slow-wave structure (SWS) has been investigated theoretically and experimentally for application in Ka-band traveling-wave tubes (TWTs). The dispersion relation for the ALFGW is derived analytically, and the dispersion chara...
| Main Authors: | , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/147323 |
| _version_ | 1811697247670239232 |
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| author | Wang, Hexin Wang, Shaomeng Wang, Zhanliang Li, Xinyi Xu, Duo He, Tenglong Tang, Tao Gong, Huarong Lu, Zhigang Duan, Zhaoyun Aditya, Sheel Gong, Yubin |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Wang, Hexin Wang, Shaomeng Wang, Zhanliang Li, Xinyi Xu, Duo He, Tenglong Tang, Tao Gong, Huarong Lu, Zhigang Duan, Zhaoyun Aditya, Sheel Gong, Yubin |
| author_sort | Wang, Hexin |
| collection | NTU |
| description | In this paper, a novel angular log-periodic folded groove waveguide (ALFGW) slow-wave structure (SWS) has been investigated theoretically and experimentally for application in Ka-band traveling-wave tubes (TWTs). The dispersion relation for the ALFGW is derived analytically, and the dispersion characteristics are calculated for a Ka-band design. The designed SWS is fabricated using oxygen-free-copper that is silver electroplated. The measured cold-test parameters show good agreement with the simulation results, with S varying from -2.7 dB to -4.8 dB and S better than -13.6 dB over the frequency range of 30-38 GHz. Simulations of beam-wave interactions using a 4850 V and 0.4 A sheet beam with a high aspect ratio of 28:1 indicate an output power of 128 W, corresponding to a maximum gain and electronic efficiency of 18.1 dB and 6.6%, respectively. Due to the log-periodic form, a higher output power, higher efficiency, wider bandwidth, and lower operating voltage are achieved as compared to a TWT based on the conventional folded groove waveguide (FGW) SWS. These results show that the proposed ALFGW SWS has good potential for application in relatively high-power wideband TWTs. |
| first_indexed | 2024-10-01T07:52:14Z |
| format | Journal Article |
| id | ntu-10356/147323 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:52:14Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1473232021-03-30T05:57:09Z Investigation of angular log-periodic folded groove waveguide slow-wave structure for low voltage Ka-band TWT Wang, Hexin Wang, Shaomeng Wang, Zhanliang Li, Xinyi Xu, Duo He, Tenglong Tang, Tao Gong, Huarong Lu, Zhigang Duan, Zhaoyun Aditya, Sheel Gong, Yubin School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Slow Wave Structure Traveling-wave Tube Amplifier In this paper, a novel angular log-periodic folded groove waveguide (ALFGW) slow-wave structure (SWS) has been investigated theoretically and experimentally for application in Ka-band traveling-wave tubes (TWTs). The dispersion relation for the ALFGW is derived analytically, and the dispersion characteristics are calculated for a Ka-band design. The designed SWS is fabricated using oxygen-free-copper that is silver electroplated. The measured cold-test parameters show good agreement with the simulation results, with S varying from -2.7 dB to -4.8 dB and S better than -13.6 dB over the frequency range of 30-38 GHz. Simulations of beam-wave interactions using a 4850 V and 0.4 A sheet beam with a high aspect ratio of 28:1 indicate an output power of 128 W, corresponding to a maximum gain and electronic efficiency of 18.1 dB and 6.6%, respectively. Due to the log-periodic form, a higher output power, higher efficiency, wider bandwidth, and lower operating voltage are achieved as compared to a TWT based on the conventional folded groove waveguide (FGW) SWS. These results show that the proposed ALFGW SWS has good potential for application in relatively high-power wideband TWTs. Published version 2021-03-30T05:57:09Z 2021-03-30T05:57:09Z 2020 Journal Article Wang, H., Wang, S., Wang, Z., Li, X., Xu, D., He, T., Tang, T., Gong, H., Lu, Z., Duan, Z., Aditya, S. & Gong, Y. (2020). Investigation of angular log-periodic folded groove waveguide slow-wave structure for low voltage Ka-band TWT. AIP Advances, 10(3). https://dx.doi.org/10.1063/1.5145346 2158-3226 0000-0001-7537-8380 0000-0002-2708-9418 0000-0001-7438-5845 0000-0002-6606-5283 0000-0002-0936-5861 0000-0001-8413-1048 0000-0002-2179-5223 0000-0002-0941-124X 0000-0003-3014-1309 https://hdl.handle.net/10356/147323 10.1063/1.5145346 2-s2.0-85082872396 3 10 en AIP Advances © 2020 All Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license(http://creativecommons.org/licenses/by/4.0/).https://doi.org/10.1063/1.5145346. application/pdf |
| spellingShingle | Engineering::Electrical and electronic engineering Slow Wave Structure Traveling-wave Tube Amplifier Wang, Hexin Wang, Shaomeng Wang, Zhanliang Li, Xinyi Xu, Duo He, Tenglong Tang, Tao Gong, Huarong Lu, Zhigang Duan, Zhaoyun Aditya, Sheel Gong, Yubin Investigation of angular log-periodic folded groove waveguide slow-wave structure for low voltage Ka-band TWT |
| title | Investigation of angular log-periodic folded groove waveguide slow-wave structure for low voltage Ka-band TWT |
| title_full | Investigation of angular log-periodic folded groove waveguide slow-wave structure for low voltage Ka-band TWT |
| title_fullStr | Investigation of angular log-periodic folded groove waveguide slow-wave structure for low voltage Ka-band TWT |
| title_full_unstemmed | Investigation of angular log-periodic folded groove waveguide slow-wave structure for low voltage Ka-band TWT |
| title_short | Investigation of angular log-periodic folded groove waveguide slow-wave structure for low voltage Ka-band TWT |
| title_sort | investigation of angular log periodic folded groove waveguide slow wave structure for low voltage ka band twt |
| topic | Engineering::Electrical and electronic engineering Slow Wave Structure Traveling-wave Tube Amplifier |
| url | https://hdl.handle.net/10356/147323 |
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