Title :
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
fDate :
4/1/1999 12:00:00 AM
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;
Journal_Title :
Plasma Science, IEEE Transactions on
