A 5.7-GHz, 100-kW microwave source based on the monotron concept

Author

Barroso, Joaquim J. ; Kostov, Konstantin G.

Author_Institution

Associated Plasma Lab., Nat. Inst. for Space Res., Sao Jose dos Campos, Brazil

Volume

27

Issue

2

fYear

1999

fDate

4/1/1999 12:00:00 AM

Firstpage

580

Lastpage

586

Abstract

A conceptual transit-electron tube based on the monotron effect is described. The device comprises a temperature-limited diode gun operating at 33-kV cathode voltage and 40-A beam current. As indicated by two-and-a-half-dimensional (2.5-D) particle-in-cell simulations, a 5.7-GHz single frequency radiation has been generated at the peak-power output level of 100 kW. The self-induced RF voltage across the diode gap produces a density modulation on the beam electrons which translates into a negative electronic admittance at proper applied dc voltages. Assuming a strictly monoenergetic beam, the transit-time effect-underlying the operation principle of the device-is examined by means of a small-signal analysis from which an analytic expression for the starting current is derived

Keywords

electron beams; electron guns; microwave generation; microwave tubes; 100 kW; 2.5D particle-in-cell simulations; 33 kV; 40 A; 5.7 GHz; applied; density modulation; diode gap; microwave source; monoenergetic beam; monotron concept; negative electronic admittance; peak-power output level; self-induced RF voltage; small-signal analysis; starting current; temperature-limited diode gun; transit-electron tube; transit-time effect; Diodes; Electromagnetic radiation; Electron beams; Electron tubes; Microwave devices; Optical modulation; Oscillators; Production; Radio frequency; Voltage;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.772289

Filename

772289