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

作     者：Shi Zong-Jun Tang Xiao-Pin Yang Zi-Qiang Lan Feng Liang Zheng 史宗君;唐效频;杨梓强;兰峰;梁正

作者机构：Terahertz Research CentreSchool of Physical ElectronicsUniversity of Electronic Science and Technology of ChinaChengdu 610054China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2012年第21卷第1期

页      面：518-523页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

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

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

摘      要：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.