Design and Experiment of an X -Band High-Efficiency Gyro-TWT Demonstrating 100-kW 1-Second Long-Pulse Radiations

• Published in: IEEE transactions on electron devices Vol. 70; no. 6; pp. 2712 - 2718
• Main Authors: Hu, Peng, Guo, Jun, Sun, Dimin, Hu, Linlin, Huang, Qili, Zhuo, Tingting, Yao, Xu, Jiang, Yi, Lei, Wenqiang, Zhang, Luqi, Song, Rui, Zeng, Zaojin, Ma, Guowu
• Format: Journal Article
• Language: English
• Published: New York The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 01.06.2023
• Subjects: Circuit design; Room temperature; Traveling wave tubes; Traveling waves
• ISSN: 0018-9383; 1557-9646
• DOI: 10.1109/TED.2022.3217114

In this article, the design and test results of an [Formula Omitted]-band high-efficiency long-pulse gyrotron traveling wave tube (gyro-TWT) based on a lossy ceramic-loaded high-frequency (HF) circuit with an operation mode of TE11 are presented. In the design, a pill-box input window, a magnetron injection gun (MIG), a room-temperature coil magnet, and a double-disk output window are adopted. A single-stage depressed collector (SSDC) is applied to enhance the efficiency of this amplifier and to reduce the dissipated beam power. In the hot test, with the beam parameter of 70 kV and 5 A, and the depressed voltage of 20 kV, this [Formula Omitted]-band gyro-TWT produces 104 kW, 1-s long-pulse radiations at 7.8 GHz, corresponding to a saturation gain of 32.2 dB and a maximum overall efficiency of 41.6%, the measured −3-dB power bandwidth exceeds 0.4 GHz.