太赫兹行波管级联倍频器

太赫兹行波管(TWT)级联倍频器基于行波管非线性互作用后电子注中的谐波电流，利用行波管和级联谐波系统组成的倍频器获得电磁波倍频放大。以 W 波段行波管二倍频器为例，对器件的正确性和可行性进行验证。利用微波管模拟器套装(MTSS)软件对设计的倍频器进行三维非线性互作用模拟，结果显示，级联了二次谐波系统的 W 波段行波管倍频器与其他工作在140 GHz~220 GHz 波段的小型太赫兹辐射源相比较，具有优越的性能：谐波输出功率在8 GHz 范围内大于2 W，转换增益大于37 dB。利用 CST公司的粒子工作室软件进行三维粒子注波互作用模拟，结果显示，太赫兹行波管级联倍频器作为潜在的太赫兹源具有高功率、宽频带和高实用化的特点。

Terahertz Traveling Wave Tube cascade multiplier

Terahertz Traveling Wave Tube(TWT) cascade multiplier is proposed for a compact source of high-power, wide-band THz radiation as a novel vacuum electronics device. For THz applications, the design and feasibility studies of a multiplier concept are presented by using a TWT with cascade harmonic system to satisfy the requirements of harmonic information in spent beam of TWT. Using Microwave Tube Simulator Suite(MTSS), the information of W-band TWT multiplier with cascade 2nd harmonic system indicates that this reasonable and practical device has good performance compared with other compact source operated in the frequency region from 140 GHz to 220 GHz. The harmonic power reaches above 2 W in 8 GHz with 37 dB conversion gain. 3-D PIC beam-wave interaction is simulated using CST Particle Studio which shows that THz TWT cascade multiplier bears good power and bandwidth performance and practicability as potential THz radiation source.