Study of a W-Band second-harmonic gyro-TWT amplifier

The design of a W-Band gyro-TWT amplifier operating in the circular TE 02 mode at the second cyclotron harmonic is presented. The interaction circuit in the design consisted of an two stage distributed-loss structure. Nonlinear analysis show that the amplifier can generate a saturated peak power of...

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Bibliographic Details
Published in2011 IEEE International Vacuum Electronics Conference (IVEC) pp. 335 - 336
Main Authors Zhiliang Li, Jinjun Feng, Efeng Wang, Bentian Liu
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.02.2011
Subjects
Bandwidth
Frequency conversion
Gyro-TWT
Gyrotrons
Harmonic analysis
Mode converter
Power amplifiers
Power generation
Second-harmonic
W-band
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Summary:The design of a W-Band gyro-TWT amplifier operating in the circular TE 02 mode at the second cyclotron harmonic is presented. The interaction circuit in the design consisted of an two stage distributed-loss structure. Nonlinear analysis show that the amplifier can generate a saturated peak power of 465kW with a gain of 49dB at 91GHz when utilized a 100kV, 20A, v 1 /v 2 =1.2 electron beam from a magnetron injection gun. Based on coupled mode theory, this paper discuss TE 02 -TE 01 mode converter within a tapered waveguide radius and obtain a bandwidth about 4.1GHz, the conversion efficiency can exceed 97%.
ISBN:9781424486625
1424486629
DOI:10.1109/IVEC.2011.5747012