物理学报2012，Vol.61Issue(7)：83-88,6.
W波段损耗介质加载回旋返波振荡器中模式竞争的研究
Research on the mode competition in a w-band lossy ceramic-loaded gyrotron backward-wave oscillator
摘要
Abstract
Mode competition induces non-stationary oscillations during the operation of a gyrotron backward-wave oscillator（gyro-BWO）, which severely reduces its tunable bandwidth and output power.Self-consistent nonlinear theory is used to study the modes-competition mechanism of a W-band fundamental TE01 mode gyro-BWO.Tapered non-resonant interaction circuit structure and loading lossy ceramic are employed to suppress the competing modes,as a way of preventing non-stationary oscillation in the circuit.Systematically optimized interaction circuit is capable of suppressing all the competing modes and can stably operate in the fundamental axial mode of the TE_（01） mode.Calculation indicates that a peak power of 105 kW and a—3 dB tunable bandwidth of 5.4%are attainable.This is meaningful and provides a theoretical foundation for developing broadband millimeter gyro-BWOs in the applications of countermeasure system,non-destructive detection,plasma diagnosis,material processing,and so on.关键词
毫米波源/电子回旋脉塞/回旋返波振荡器/模式竞争Key words
millimeter-wave source/electron cyclotron maser/gyro-BWO/lossy dielectric分类
信息技术与安全科学引用本文复制引用
杜朝海,李铮迪,薛志浩,刘濮鲲,薛谦忠,张世昌,徐寿喜,耿志辉,顾伟,粟亦农,刘高峰..W波段损耗介质加载回旋返波振荡器中模式竞争的研究[J].物理学报,2012,61(7):83-88,6.基金项目
国家自然科学基金（批准号：61072024,61072026,60971072）资助的课题 （）
