A concentric arc meander line (CAML) slow wave structure (SWS) was proposed for applications on low voltage and high efficiency Ka -band traveling wave tube (TWT). Due to the CAML formed with a series of concentric arcs, the electric field in the radial direction may be more uniform, which may make the beam–wave interaction more sufficient and the electron efficiency improved. The metal shielding structure with symmetrical ridges was employed for impedance matching to obtain a wide bandwidth. Simulated results demonstrate that the proposed CAML-SWS TWT has a good transmission performance in Ka -band. When the initial beam voltage and current is set to 720 V and 0.2 A, respectively, the output power of the TWT can reach 44.15 W at 35 GHz with the gain and the electron efficiency of 18.6 dB and 30.66%, respectively. Furthermore, the 3-dB bandwidth can cover 24–42 GHz and the electron efficiency is over 23.2% in Ka -band.

中文翻译：

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同心弧曲线慢波结构在低压高效率上的应用 K a-波段TWT

提出了同心弧曲线（CAML）慢波结构（SWS）用于低电压和高效率的应用 K a 波段行波管（TWT）。由于CAML由一系列同心圆弧形成，因此径向方向上的电场可能更均匀，这可能使束波相互作用更加充分，并且电子效率得到改善。具有对称脊的金属屏蔽结构用于阻抗匹配以获得宽带宽。仿真结果表明，所提出的CAML-SWS TWT具有良好的传输性能。K a -乐队。当初始射束电压和电流分别设置为720 V和0.2 A时，TWT的输出功率在35 GHz下可以达到44.15 W，其增益和电子效率分别为18.6 dB和30.66％。此外，3-dB带宽可以覆盖24-42 GHz，并且电子效率超过23.2％。K a -乐队。