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提出采用圆形电子注和双排矩形梳状慢波结构作为W波段宽频带行波管注波互作用回路.对该慢波回路的“冷”态特性、输入输出结构等方面进行了模拟仿真和分析,研究结果表明,该结构色散特性较好,带宽较宽;通过调整双排矩形梳状慢波结构之间的距离和电子注通道半径的尺寸,圆形电子注系统取得了和带状注系统相同的耦合阻抗;且该结构传输特性较好,优化后整管的驻波比能在较宽的频带内保持在2以下.此外,对该慢波系统的大信号理论计算和PIC粒子模拟结果一致.在50 mW驱动功率下,输出功率在10 GHz带宽内大于40 W,增益高于29 dB.
A circular electronic injection and a double-row rectangular comb-shaped slow wave structure are proposed as the W-band wideband traveling wave tube (MWWT) wave injection interaction circuit. The “cold” state characteristics, input and output structure, etc. of the slow- The simulation results show that the structure has better dispersion characteristics and wider bandwidth. By adjusting the distance between the double-row rectangular comb-type slow-wave structures and the radius of the electron injection channel, The same coupling impedance of the strip-like injection system, and the transmission characteristics of the structure are good, and the VSWR of the optimized pipe can be kept below 2 in a wider frequency band.In addition, the theoretical calculation of the large signal of the slow-wave system PIC particle simulation results are consistent at 50 mW drive power, the output power is greater than 40 W in the 10 GHz bandwidth, gain greater than 29 dB.