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所属单位：[1]Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Sichuan, Peoples R China

发表刊物：IEEE ELECTRON DEVICE LETTERS

关键字：Diffractive-wave feedback mechanism; rf circuits; confocal gyro-TWAs

摘要：In this letter, diffractive-wave feedback mechanism of confocal gyrotron travelling-wave amplifiers (gyro-TWAs) is presented and verified in cold-test experiments for the first time. The reason for this physical mechanism is that part of the diffractive wave re-enters the open circuit during outward radiation. The achieved circuit loss is less than the theoretical predictions without considering the feedback. This abnormal behavior will seriously deteriorate the stability of the amplifiers including potential near-cutoff instability and backward-wave oscillation, presenting as a main factor that greatly degrades the performance of confocal gyro-TWAs, especially in high-gain operation.

第一作者：Yelei Yao et al.

文献类型：Article

卷号：39

期号：3

页面范围：436-439

ISSN号：0741-3106

是否译文：否