Experimental investigation of a broadband dielectric-loaded gyro-TWT amplifier

Author

Leou, K.C. ; McDermott, D.B. ; Chong, C.K. ; Luhmann, N.C., Jr.

Volume

43

Issue

6

fYear

1996

fDate

6/1/1996 12:00:00 AM

Firstpage

1016

Lastpage

1020

Abstract

The bandwidth of a gyrotron travelling wave amplifier has been broadened by incorporating a dielectric-loaded interaction waveguide to reduce the circuit´s dispersion. This proof-of-principle experiment was designed for the X-band frequency range and operates in the fundamental mode of a rectangular waveguide loaded with dielectric Macor. The amplifier is zero-drive stable and demonstrates a peak output power of 55 kW, 11% efficiency, 27 dB saturated gain with an unprecedented untapered gyro-TWT constant-drive bandwidth of 11% and a saturated bandwidth of 14%. Its performance can be further enhanced by reducing the beam´s axial velocity spread as shown by previous simulation studies

Keywords

dielectric-loaded waveguides; electron tube testing; gyrotrons; microwave power amplifiers; microwave tubes; rectangular waveguides; travelling wave amplifiers; travelling wave tubes; wideband amplifiers; 11 percent; 27 dB; 55 kW; Macor; SHF tube; X-band frequency range; beam axial velocity spread reduction; broadband gyro-TWT amplifier; dielectric-loaded interaction waveguide; fundamental mode; gyrotron travelling wave amplifier; rectangular waveguide; zero-drive stable; Bandwidth; Broadband amplifiers; Circuits; Dielectrics; Frequency; Gyrotrons; Loaded waveguides; Power amplifiers; Power generation; Rectangular waveguides;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.502138

Filename

502138