Liao Ming-Liang et al 2009 Chinese Phys. Lett. 26 114207 doi:10.1088/0256-307X/26/11/114207
Analysis of a Novel Ka-band Folded Waveguide Amplifier for Traveling-Wave Tubes
Liao Ming-Liang1, Wei Yan-Yu1, He Jun1, Gong Yu-Bin1, Wang Wen-Xiang1 and Gun-sik Park2
Show affiliationsFUNDAMENTAL AREAS OF PHENOMENOLOGY (INCLUDING APPLICATIONS)
A novel Ka-band folded waveguide (FW) amplifier for traveling wave tubes (TWT) is investigated. The dispersion curve and interaction impedance are obtained and compared to the normal FW circuit by numerical simulation. The interaction impedance is higher than a normal circuit through the whole band. We also study the beam-wave interaction in this novel circuit, and the nonlinear large-signal performance is analyzed by a 3-D particle-in-cell code MAGIC3D. A much higher continuous-wave (CW) output power with a considerably shorter circuit compared to a normal circuit is predicted by our simulation. Moreover, the novel FW even has a broader 3-dB bandwidth. It therefore will be useful in designing a miniature but high-power and broadband millimeter-wave TWT.
- PACS
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84.40.Fe Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.)
- Subjects
- Dates
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Issue 11 (November 2009)
Received 10 July 2009
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Analysis of a Novel Ka-band Folded Waveguide Amplifier for Traveling-Wave Tubes
Liao Ming-Liang et al 2009 Chinese Phys. Lett. 26 114207
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