Zhi-Gang LU, Wei-Hua GE, Rui-Dong WEN, Zhi-Cheng SU, Mei-Ling ZHU, Ke-Sen DING, Zhan-Liang WANG, Tao TANG. Design and cold-test of sheet beam coupled cavity slow wave structure for W-Band TWT[J]. Journal of Infrared and Millimeter Waves, 2020, 39(2): 157
- Journal of Infrared and Millimeter Waves
- Vol. 39, Issue 2, 157 (2020)
Fig. 1. (a) Cut-away isometric view of a 3-D model of a full period (created by stacking two rotated unit cells), (b) the top view, (c) the left view, and (d) the front view of cutting-plane of the full period three-slot SWS
Fig. 2. Dispersion curves of the sheet beam CC-SWS (a) frequency varies with phase shift, (b) normalized phase velocity varies with frequency
Fig. 3. The distribution of interaction impedance on (a) the cross-section of beam tunnel, (b) the cross-section of sheet beam, and (c) average interaction impedance over the cross-section of sheet beam
Fig. 4. (a) The vacuum model, and (b) the transmission characteristics of the sheet beam CC-SWS
Fig. 5. The electron bunching phenomenon at 94 GHz
Fig. 6. Phase momentum of bunched electron beam at 94 GHz
Fig. 7. Input and output signals at 94 GHz
Fig. 8. Frequency spectrum of output signal at 94 GHz
Fig. 9. (a) The electron efficiency and saturated gain, and (b) the saturated output power versus the frequency
Fig. 10. (a) Coupled-cavity diaphragms, (b) transition waveguides, and (c) input & output window components
Fig. 11. (a) Clamping molds and the final test sample, (b) assembly drawing using UG software, and (c) assembly for testing
Fig. 12. Test site of the CC-TWT circuit
Fig. 13. S11 comparison between cold-test and simulation results
Fig. 14. VSWR comparison between test and simulation results
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Table 1. Parameters for simulated SWS
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