Design of a high-efficiency, broadband, second harmonic, 250 kW, Ka-Band amplifier

Author

Arjona, Melany R. ; Lawson, Wes

Author_Institution

Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA

Volume

26

Issue

3

fYear

1998

fDate

6/1/1998 12:00:00 AM

Firstpage

461

Lastpage

467

Abstract

A theoretical design of a new broadband, Ka-band, microwave amplifier has been completed and is now presented. The device combines elements of traveling wave tubes and gyrotrons, producing a 5% instantaneous bandwidth and a 26-dB gain with a realistic beam. The amplifier is driven at the first harmonic near 17 GHz, and the output frequency is near 31 GHz. A linearly streaming angular beam (generated by a hollow Pierce-like electron gun) is bunched by a bells before being converted to a rotating beam in order to generate microwaves in a circular waveguide. Via this interaction, microwave energy is extracted with an efficiency above 42%. With an input beam voltage and current of 75 kV and 8 A, respectively, a peak power over 250 kW in the TE₀₂ mode is produced

Keywords

electron guns; gyrotrons; microwave power amplifiers; travelling wave amplifiers; wideband amplifiers; 17 GHz; 250 kW; 34 GHz; 75 kV; 8 A; TE₀₂ mode; circular waveguide; design; gyrotrons; high-efficiency broadband second harmonic Ka-Band amplifier; hollow Pierce-like electron gun; linearly streaming angular beam; microwave amplifier; realistic beam; traveling wave tubes; Bandwidth; Broadband amplifiers; Electron beams; Frequency; Gyrotrons; Hollow waveguides; Microwave amplifiers; Microwave devices; Microwave generation; Voltage;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.700778

Filename

700778