Normally, the conventional sheet beam extended interaction oscillator (SB-EIO) operates in a single mode and has a narrow tunable bandwidth. To broaden the tunable bandwidth, the concept of multiple-mode operation is proposed and a 0.3-THz ladder-shaped interaction circuit is designed as described in this article. The interaction circuit was manufactured by using the computer numerical control milling technique and cold tested by using a vector network analyzer. Measured and simulated results were in good agreement with each other. Beam-wave interaction simulations with the ohmic loss being taken into account verified the feasibility of the multiple-mode operation and demonstrated that the SB-EIO produced an output power of >91 W in the frequency range of 293.7-294.9 GHz. Compared with the single-mode SB-EIO, the tunable bandwidth of the multiple-mode SB-EIO has increased from 0.3 to 1.2 GHz.

中文翻译：

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具有多模式操作的 0.3-THz 片束扩展交互振荡器交互电路的设计和微加工


通常，传统的片束扩展相互作用振荡器（SB-EIO）以单模工作，并且具有窄的可调带宽。为了拓宽可调带宽，提出了多模式操作的概念，并设计了本文所述的 0.3-THz 梯形交互电路。采用计算机数控铣削技术制作交互电路，并使用矢量网络分析仪进行冷态测试。测量结果和模拟结果非常吻合。考虑欧姆损耗的束波相互作用仿真验证了多模操作的可行性，并证明SB-EIO在293.7-294.9 GHz频率范围内产生>91 W的输出功率。与单模SB-EIO相比，多模SB-EIO的可调带宽从0.3 GHz增加到1.2 GHz。