Demonstration of a Pulsed G-Band 50-W Traveling Wave Tube
Demonstration of a Pulsed G-Band 50-W Traveling Wave Tube
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DOI：
10.1109/led.2020.3044450
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发表时间：
2021-02-01
影响因子：
4.9
通讯作者：
Feng, Jinjun
中科院分区：
文献类型：
--
作者：
Bian, Xingwang;Pan, Pan;Feng, Jinjun
介绍了G波段50 W脉冲笔形束行波管的研究进展。通过将工作点设置在截止频率附近、使用具有改进圆形弯曲（MCB）的折叠波导（FWG）慢波结构（SWS）以及采用相速度渐变（PVT）技术等三种方法相结合来提高管的工作性能。当束流电压为24.25 kV，束流电流为59 mA时，在占空比为5%的条件下，输出功率大于50 W，带宽为3.6 GHz。相应的电子效率和增益分别高于3.5%和35 dB。实验结果表明，这种结构紧凑的太赫兹放大器具有高功率、高电子效率和显著的带宽。
This letter presents the research progress of a pulsed G-band 50 W traveling wave tube (TWT) with pencil beam focused by periodic permanent magnet (PPM). Three approaches have been combined to improve the tube's operation performances including setting the operating point near the cutoff frequency, using the folded waveguide (FWG) slow wave structure (SWS) with modified circular bends (MCBs), and adopting phase velocity tapering (PVT) technique. The measured output power can be over 50 W at 5% duty cycle with a bandwidth of 3.6 GHz when the beam voltage is 24.25 kV and the beam current is 59 mA. Corresponding electronic efficiency and gain are higher than 3.5% and 35 dB, respectively. The results provide a demonstration of a compact terahertz amplifier with high power, high electronic efficiency and significant bandwidth.