Linear and nonlinear analyses of a wideband gyro-TWT

Author

Cheo, Bernard R. ; Rekiouak, Abdelkrim

Author_Institution

Dept. of Electr. Eng., Polytechnic Univ., New York, NY, USA

Volume

36

Issue

4

fYear

1989

fDate

4/1/1989 12:00:00 AM

Firstpage

802

Lastpage

810

Abstract

Linear and nonlinear analyses on a gyrotron amplifier with a periodically disk-loaded cylindrical waveguide circuit are performed. The dispersion relation of the circuit allows for wideband interaction with a relativistic beam of moderate power (V_b=60 kV, I_b=5 A). Linear analysis of the interaction with the fundamental mode shows a gain of the order of 50-60 dB/m over a bandwidth larger than 22% and a linear phase versus frequency characteristic. Nonlinear analysis predicts 48-kW saturated output power at 5.3 GHz with 18% efficiency. The saturation length for a 20-dB tube is about 37 cm

Keywords

dispersion (wave); electron beams; gyrotrons; microwave amplifiers; travelling-wave-tubes; wideband amplifiers; 18 percent; 20 dB; 37 cm; 48 kW; 5 A; 5.3 GHz; 60 kV; SHF; cylindrical waveguide circuit; dispersion relation; fundamental mode; gyro-TWT; gyrotron amplifier; linear analysis; microwave tubes; nonlinear analysis; periodically disk-loaded; phase/frequency characteristic; relativistic beam; saturated output power; saturation length; wideband interaction; Bandwidth; Circuits; Dispersion; Electron beams; Frequency; Gyrotrons; Oscillators; Performance analysis; Power generation; Wideband;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.22490

Filename

22490