Wideband Power Combining of Four Microfabricated W-Band Traveling-Wave Tubes
Wideband power combining of four W-band microfabricated traveling-wave tubes (TWTs) is presented. The proposed TWTs are based on a planar helix slow-wave structure (SWS) with straight-edge connections (PH-SEC) that can be microfabricated with stripline input-output feed. A novel 1:4 WR-10 waveguide-...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2018
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| Online Access: | https://hdl.handle.net/10356/88097 http://hdl.handle.net/10220/44521 |
| _version_ | 1811694159777497088 |
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| author | Wang, Shaomeng Aditya, Sheel |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Wang, Shaomeng Aditya, Sheel |
| author_sort | Wang, Shaomeng |
| collection | NTU |
| description | Wideband power combining of four W-band microfabricated traveling-wave tubes (TWTs) is presented. The proposed TWTs are based on a planar helix slow-wave structure (SWS) with straight-edge connections (PH-SEC) that can be microfabricated with stripline input-output feed. A novel 1:4 WR-10 waveguide-to-stripline power divider- combiner is designed that covers the frequency range of 92-104 GHz. The simulation results show that S11 is less than -20 dB and the magnitude and phase differences among the four output signals are less than 0.01 dB and 0.41°, respectively, indicating a power combining efficiency as high as 99.9%. The power divider, four PH-SEC SWSs, and the power combiner are assembled and the performance of the overall assembly is checked by simulation. The overall S11 is better than -15 dB in the frequency range of 91.7-100.7 GHz and S21 is better than -12.3 dB. Effects of power and phase variation of individual TWTs have also been considered. With four 5-kV and 10-mA sheet electron beams, particle-in-cell simulations show that the combined TWTs can give 25-W saturation peak power at 94 GHz with a gain of 18 dB. |
| first_indexed | 2024-10-01T07:03:09Z |
| format | Journal Article |
| id | ntu-10356/88097 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:03:09Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/880972020-03-07T13:57:28Z Wideband Power Combining of Four Microfabricated W-Band Traveling-Wave Tubes Wang, Shaomeng Aditya, Sheel School of Electrical and Electronic Engineering Power Combining Microfabrication Wideband power combining of four W-band microfabricated traveling-wave tubes (TWTs) is presented. The proposed TWTs are based on a planar helix slow-wave structure (SWS) with straight-edge connections (PH-SEC) that can be microfabricated with stripline input-output feed. A novel 1:4 WR-10 waveguide-to-stripline power divider- combiner is designed that covers the frequency range of 92-104 GHz. The simulation results show that S11 is less than -20 dB and the magnitude and phase differences among the four output signals are less than 0.01 dB and 0.41°, respectively, indicating a power combining efficiency as high as 99.9%. The power divider, four PH-SEC SWSs, and the power combiner are assembled and the performance of the overall assembly is checked by simulation. The overall S11 is better than -15 dB in the frequency range of 91.7-100.7 GHz and S21 is better than -12.3 dB. Effects of power and phase variation of individual TWTs have also been considered. With four 5-kV and 10-mA sheet electron beams, particle-in-cell simulations show that the combined TWTs can give 25-W saturation peak power at 94 GHz with a gain of 18 dB. Accepted version 2018-03-07T02:51:02Z 2019-12-06T16:55:55Z 2018-03-07T02:51:02Z 2019-12-06T16:55:55Z 2017 Journal Article Wang, S., & Aditya, S. (2017). Wideband Power Combining of Four Microfabricated W-Band Traveling-Wave Tubes. IEEE Transactions on Electron Devices, 64(9), 3849-3856. 0018-9383 https://hdl.handle.net/10356/88097 http://hdl.handle.net/10220/44521 10.1109/TED.2017.2720191 en IEEE Transactions on Electron Devices © 2017 Institute of Electrical and Electronics Engineers (IEEE). This is the author created version of a work that has been peer reviewed and accepted for publication by IEEE Transactions on Electron Devices, Institute of Electrical and Electronics Engineers (IEEE). It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1109/TED.2017.2720191]. 8 p. application/pdf |
| spellingShingle | Power Combining Microfabrication Wang, Shaomeng Aditya, Sheel Wideband Power Combining of Four Microfabricated W-Band Traveling-Wave Tubes |
| title | Wideband Power Combining of Four Microfabricated W-Band Traveling-Wave Tubes |
| title_full | Wideband Power Combining of Four Microfabricated W-Band Traveling-Wave Tubes |
| title_fullStr | Wideband Power Combining of Four Microfabricated W-Band Traveling-Wave Tubes |
| title_full_unstemmed | Wideband Power Combining of Four Microfabricated W-Band Traveling-Wave Tubes |
| title_short | Wideband Power Combining of Four Microfabricated W-Band Traveling-Wave Tubes |
| title_sort | wideband power combining of four microfabricated w band traveling wave tubes |
| topic | Power Combining Microfabrication |
| url | https://hdl.handle.net/10356/88097 http://hdl.handle.net/10220/44521 |
| work_keys_str_mv | AT wangshaomeng widebandpowercombiningoffourmicrofabricatedwbandtravelingwavetubes AT adityasheel widebandpowercombiningoffourmicrofabricatedwbandtravelingwavetubes |