Sheet beam vacuum electron tubes are an attractive solution for high-power sources or amplifiers at millimeter-wave and terahertz range. In this article, a high-order coalesced TM ₁₁ -like mode operation for 220 GHz sheet beam traveling-wave tube is proposed. The feasibility of coalesced TM ₁₁ -like mode operation is investigated. The utilization of high-order mode expands the RF circuit power capacity, increases the beam current and reduces the cathode emission density. The self-consistent nonlinear code and three-dimensional particle-in-cell simulations are used to verify the 6.7% beam-wave interaction at 220 GHz without phase matching optimization. The maximum output power reaches 370 W. The results demonstrate this methodology is a good solution to build a high-power device for a wide region of terahertz.

中文翻译：

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适用于220 GHz片束行波管的高阶Coalsced TM ₁₁样模式操作

对于大功率源或毫米波和太赫兹范围的放大器，薄板真空电子管是一种有吸引力的解决方案。在本文中，提出了 针对220 GHz薄板束行波管的高阶合并TM ₁₁类模式操作。合并TM ₁₁的可行性 类模式操作进行了调查。高阶模式的使用扩展了RF电路的功率容量，增加了电子束电流，并降低了阴极发射密度。自洽非线性代码和三维单元格粒子仿真用于验证在不进行相位匹配优化的情况下在220 GHz下6.7％的束波相互作用。最大输出功率达到370W。结果表明，该方法是构建适用于宽太赫兹区域的高功率器件的良好解决方案。