Traveling-Wave Amplification in a Circuit With Nonuniform Grating

The results of both numerical simulations and experimental study of the traveling-wave amplification in the <inline-formula> <tex-math notation="LaTeX">{W} </tex-math></inline-formula>-band circuit with the nonuniform grating are presented and discussed. The circuit...

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Published inIEEE transactions on electron devices Vol. 68; no. 10; pp. 5232 - 5237
Main Authors Ponomarenko, S. S., Likhachev, A. A., Vlasenko, S. A., Kovshov, Yu. S., Stoyanova, V. V., Kishko, S. A., Khutoryan, E. M., Kuleshov, A. N., Lukin, K. A., Tatematsu, Y., Tani, M.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.10.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Amplifiers
Bandwidths
Circuits
Couplings
Dispersion
Electron beams
Electrons
Frequency ranges
Gain
Gratings
Harmonic analysis
Impedance
Nonuniform grating (NUG)
sheet electron beam
slow wave circuit
traveling-wave tube (TWT)
Wave amplification
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Summary:The results of both numerical simulations and experimental study of the traveling-wave amplification in the <inline-formula> <tex-math notation="LaTeX">{W} </tex-math></inline-formula>-band circuit with the nonuniform grating are presented and discussed. The circuit supports a wide sheet electron beam that is promising for a signal gain increase in terahertz (THz) amplifiers. The small-signal gain up to 30 dB is predicted by the simulations of the two-section amplifier in the frequency range from 94 to 99 GHz. The experimental tests of the 14.3-mm input section, powered by a 3.8 kV, 100-mA sheet electron beam, revealed the linear gain of 12 dB and instantaneous bandwidth of 2 GHz. The full bandwidth of 5 GHz has been experimentally observed by adjusting the beam voltage from 3.6 to 4.1 kV.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2021.3105951