Simulations of a two-stream backward-wave oscillator with a slot-hole structure

doi:10.1088/1674-1056/21/1/018401

Abstract We study a two-stream backward-wave oscillator with a slot-hole structure at short millimeter waves with the help of a three-dimensional particle-in-cell simulation. In order to increase the interaction region of the electron beam, the efficiency and the output power, a slot-hole loaded rectangular waveguide structure used as the high-frequency system is proposed. Based on the mechanism of the backward-wave oscillator, a slow-wave oscillator with a frequency of 0.14 THz is designed. The simulations show that the output power and the efficiency of the oscillator can be enhanced due to the coupling between the two beams through the slot holes. The interaction efficiency is 5.18%, and the starting current density is below 5 A·cm^-2 for the two beams. These attractive results indicate that, based on the two-stream backward-wave oscillator, we can get short millimeter wave sources with high power and low current density.

Keywords: slot-hole structure short millimeter wave two-stream backward-wave oscillator

Received: 20 March 2011
Revised: 10 June 2011
Accepted manuscript online:

PACS:	84.40.Fe	(Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.))
	07.57.Hm	(Infrared, submillimeter wave, microwave, and radiowave sources)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11075032 and 10975031).

Cite this article:

Shi Zong-Jun(史宗君), Tang Xiao-Pin(唐效频), Yang Zi-Qiang(杨梓强), Lan Feng(兰峰), and Liang Zheng(梁正) Simulations of a two-stream backward-wave oscillator with a slot-hole structure 2012 Chin. Phys. B 21 018401

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Simulations of a two-stream backward-wave oscillator with a slot-hole structure

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