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

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2 Author(s)
Barroso, J.J. ; Associated Plasma Lab., Nat. Inst. for Space Res., Sao Jose dos Campos, Brazil ; Kostov, K.G.

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

Published in:

Plasma Science, IEEE Transactions on  (Volume:27 ,  Issue: 2 )

Date of Publication:

Apr 1999

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