期刊
IEEE TRANSACTIONS ON PLASMA SCIENCE
卷 48, 期 8, 页码 2939-2947出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPS.2020.3010423
关键词
Electron beams; Saturation magnetization; Gain; Integrated circuit modeling; Couplings; Magnetic circuits; Passband; Gain flatness; LIGA technology; operation voltage; phase velocity stepping interaction circuit; precision alignment technology; W-band folded waveguide traveling wave tube (FWTWT)
A W-band folded waveguide traveling wave tube (FWTWT) with lowered 19.4-kV operation voltage and improved gain flatness was investigated and developed. In this article, design methodology, fabrication, and test results were presented and discussed. Two kinds of slow-wave circuits with the positive and negative period stepping were chosen to carry out the contrastive study. A folded waveguide automatic measurement code was independently developed, and the FWTWT was fabricated by LIGA method. The test results showed that a saturated output power was greater than 87 W in the frequency range of 93-100 GHz and greater than 102 W in the frequency range of 95-98.3 GHz with the maximum output power of 123 W at 96.9 GHz. Within the frequency range of 93-100 GHz, saturated gains were higher than 30.05 dB, and gain fluctuation was 3.47 dB with the maximum gain of 33.52 dB at 96.9 GHz. The maximum electronic efficiency of 7.04% and the maximum total efficiency of 13.52% were obtained.
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