回旋行波放大器输出端反射对其稳定性的影响

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Influence of reflections of output port on stability of gyrotron traveling wave amplifier

1.
College of Information Engineering,North China University of Technology,Beijing 100144,China;
2.
The No.29 Institute of China Electronic Technology Group Corporation,Chengdu 610036,China;
3.
Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China

摘要: 基于回旋行波放大器的线性理论和反射边界条件，建立了渐变输出端存在反射时回旋行波放大器模型，分析了TE01圆电模基波回旋行波放大器输出端反射对其增益、返波起振长度、返波起振电流和返波起振频率的影响。结果表明，随着反射增强，线性增益降低，返波起振长度和起振电流减小，返波起振频率的变化较小；反射增强将在一定程度内影响放大器的稳定性。
- 回旋行波放大器 /
- 回旋返波振荡 /
- 反射系数 /
- 注-波互作用 /
- 起振条件
Abstract: Based on the linear theory of gyrotron traveling wave amplifier (gyro-TWA) and the boundary condition, the model of the gyro-TWA with reflections at the output port is established. The influence of the reflections on the wave gain rate, the back wave starting length and the back wave starting current for a Ka band TE01 gyro-TWA at fundamental mode is analyzed. The simulating results show that, for the TE01 mode gyro-TWA, the linear growth rate decreases, the starting length and current of the gyro-backward wave oscillation decrease but the starting frequency varies little with the increase of the tapering angle, and the increased reflection may lower the amplifier’s stability to some extent.
- gyro-twa /
- gyro-backward wave oscillation /
- reflection coefficient /
- beam-wave interaction /
- starting conditions

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