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摘要: 微带行波管（TWTs）因其在通信、国防及各类工业领域的广阔应用前景而备受关注。报道了一种基于U形悬置微带线慢波结构（SWS）的W波段小型化双通道行波管，详细论述了慢波结构的高频特性，并通过结构调整优化了其传输特性。采用18.8 kV、0.1 A的电子注进行粒子模拟（PIC）计算表明，该双通道行波管可实现18 W的输出功率，对应增益14 dB。最后，采用三种基底材料（Rogers
5880 、石英和金刚石）开展加工和S参数测试，测试表明，石英基底，光刻加工方法的结果与仿真吻合度最高。Abstract: Microstrip Traveling Wave Tubes (TWTs) have garnered significant attention due to their potential applications in communication, defense, and industrial systems. This paper presents a compact W-band dual-channel TWT, utilizing a U-shaped microstrip meander line slow wave structure (SWS). High-frequency characteristics are analyzed through simulation and cold tests. The results demonstrate that adjusting structural parameters effectively optimizes the S-parameters. Particle-in-cell (PIC) simulations with an 18.8 kV, 0.1 A electron beam predict an output power of 18 W with a gain of 14 dB. Experimental measurements of S-parameters are conducted using three substrate materials: Rogers5880 , quartz, and diamond. The quartz substrate exhibits the closest agreement with simulation results. The results advance the development of the microstrip TWTs for high-data-rate communication systems.-
Key words:
- TWT /
- mm wave /
- meander line /
- multi-channel amplifier
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Table 1. The PIC parameters
voltage of the electron
beam, U/kVcurrent of the electron
beam, I/Aradius of circle
beam, Rbeam/mmmagnetic field,
Bz/Tinput power,
Pin/mW18.8 0.1 0.17 0.5 720 
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