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Design and Measurement of a Novel Overmoded $TE_{01}$ Mode Converter for a Rectangular Gyro-TWT
| Content Provider | MDPI |
|---|---|
| Author | Lu, Chao Xuan Jiang, Wei Wu, Zewei Liu, Guo Wang, Jianxun Pu, Youlei Luo, Yong |
| Copyright Year | 2022 |
| Description | The rectangular gyrotron traveling wave tube (gyro-TWT) with a large aspect ratio (α) has the potential to achieve megawatt-class output power. As an essential component of gyro-TWT, a novel overmoded Ka-band mode converter with an α of 6.19 is designed, analyzed, and cold tested in this paper. Based on the magnetic dipole moment theory, the rectangular overmoded $TE_{01}$ mode is excited via the rectangular fundamental $TE_{10}$ mode. The cutoff waveguide is applied to prevent electromagnetic wave transport to the magnetron injection gun (MIG) region and also guarantee higher power electron beam transportation. Simulations predict an operation bandwidth higher than 4 GHz and greater than 99.8% mode purity between 33–37 GHz. To verify this design, the mode converter is manufactured and cold tested. The back-to-back measurement results exhibit a good agreement with the simulation. With similar topologies, the rectangular overmoded $TE_{01}$ mode can be excited in a different α. |
| Starting Page | 1111 |
| e-ISSN | 2072666X |
| DOI | 10.3390/mi13071111 |
| Journal | Micromachines |
| Issue Number | 7 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-07-15 |
| Access Restriction | Open |
| Subject Keyword | Micromachines Industrial Engineering Gyro-twt Rectangular Overmoded Te01 Mode Mode Converter |
| Content Type | Text |
| Resource Type | Article |
