A dual-beam planar slow wave structure (SWS), named dielectric supported ring-bar SWS is proposed in this paper. The planar SWS is supported by two dielectric rods at the side edges, making it fit for dual sheet beam operation. The high frequency and transmission characteristics of the proposed SWS are investigated. The backward-wave oscillation and higher harmonic waves are effectively suppressed by setting two cathodes in the same plane parallel to the SWS and negative phase-velocity jumping. The hot performance of the proposed SWS is carried out by using particle-in-cell (PIC) simulation, in which two sheet electron beams (9.7 kV, 0.2 A) are employed to provide direct current power. With an input power of 1W, the output power is 180 W at 38 GHz and the corresponding gain is 22.6 dB. Besides, after adding dielectric rods to the output part, the entire structure dissipates heat well by thermal analysis.

中文翻译：

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采用支撑平面环条慢波结构的Ka波段双片束行波管

本文提出了一种双波束平面慢波结构（SWS），称为介电支撑环条SWS。平面 SWS 由侧边缘的两个介电棒支撑，使其适合双板梁操作。研究了所提出的 SWS 的高频和传输特性。通过将两个阴极设置在平行于 SWS 的同一平面上和负相速度跳跃，有效地抑制了逆向波振荡和高次谐波。所提出的 SWS 的热性能是通过使用电池内粒子 (PIC) 模拟来实现的，其中采用两个片状电子束 (9.7 kV，0.2 A) 提供直流电源。输入功率为 1W 时，在 38 GHz 时输出功率为 180 W，相应的增益为 22.6 dB。此外，在输出部分增加介质棒后，