Jing-Yu GUO, Ning-Jie SHI, He-Xin WANG, Yang DONG, Zhan-Liang WANG, Zhi-Gang LU, Zhao-Yun DUAN, Hua-Rong GONG, Yu-Bin GONG, Shao-Meng WANG. 340 GHz folded diamond shaped waveguide slow-wave structure[J]. Journal of Infrared and Millimeter Waves, 2021, 40(4): 483
- Journal of Infrared and Millimeter Waves
- Vol. 40, Issue 4, 483 (2021)
Fig. 1. Comparison between FDSWG and FWG （a） models， and （b） electric fields.
Fig. 2. Dispersion curve of structures with different flare angle
Fig. 3. Comparison of FWG and FDSWG （a） dispersion characteristics， （b） interaction impedance Note： 1-FDSWG， 2-FWG with the same dimensions， 3-FWG with the same frequency band
Fig. 4. The rounded corners of FDSWG
Fig. 5. High frequency characteristics with different value of d （a） dispersion， and （b） interaction impedance.
Fig. 6. （a） Input-output couplers， and （b） electric field distribution on cross-sectional faces.
Fig. 7. S parameters of the input-output coupler
Fig. 8. Sketch of sever and attenuator.
Fig. 9. High frequency characteristics with different value of h （a） dispersion， and （b） interaction impedance
Fig. 10. Phase-velocity of slow wave versus axial distance
Fig. 11. 3-D model of folded diamond shaped waveguide SWS.
Fig. 12. S parameters for the complete SWS.
Fig. 13. Output （a） signal， and （b） frequency spectrum
Fig. 14. （a）Electron bunching， and （b）power versus axial distance
Fig. 15. Electron kinetic energy at 20 ns.
Fig. 16. Comparation of output between two structures （a） output power， and （b） gain Note： 1-with phase-velocity tapering， 2-without phase-velocity tapering
Fig. 17. Comparison of operating frequency and bandwidth
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Table 1. Structure dimensions /μm
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