A novel slow wave structure (SWS), named staggered double corrugated waveguide (SDCW), is proposed for the development of wideband high-power terahertz (THz) traveling wave tubes (TWTs). The SDCW-SWS not only has the wideband characteristic of staggered double grating (SDG) but also has the high interaction impedance characteristic of symmetrical double grating. In addition, its tunnel width is independent of the lower cutoff frequency and can be further increased. Numerical Eigen mode calculations show that, under the same dispersion, the passband of SDCW-SWS is increased by more than 10 GHz compared with SDG-SWS, and the average interaction impedance at 195 GHz is increased by about 62%. A particle-in-cell simulation analysis confirms that the average output power, saturated gain, and electron efficiency of SDCW-TWT at 195 GHz are ~110 W, ~20.34 dB, and ~5.46%, respectively, when the operating voltage is 20 kV and the beam current is 100 mA. Therefore, SDCW is a promising slow wave circuit of wideband high-power THz traveling wave amplifier.

中文翻译：

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基于薄板梁和新型交错双波纹波导的0.2-THz行波管

一种新型慢波结构 (SWS)，称为交错双波纹波导 (SDCW)，被提议用于开发宽带高功率太赫兹 (THz) 行波管 (TWT)。SDCW-SWS不仅具有交错双光栅（SDG）的宽带特性，而且还具有对称双光栅的高交互阻抗特性。此外，它的隧道宽度与较低的截止频率无关，可以进一步增加。数值本征模式计算表明，在相同色散下，SDCW-SWS的通带比SDG-SWS提高了10 GHz以上，195 GHz的平均交互阻抗提高了约62%。电池内粒子模拟分析证实，SDCW-TWT 在 195 GHz 下的平均输出功率、饱和增益和电子效率为 ~110 W，~20。当工作电压为 20 kV 且束流为 100 mA 时，分别为 34 dB 和 ~5.46%。因此，SDCW是一种很有前途的宽带大功率太赫兹行波放大器慢波电路。