【摘要】 该文利用三维电磁仿真软件模拟计算了THz圆波导梳状慢波结构的负1次返波的色散和耦合阻抗。结果证实:在430-570GHz频带内,慢波结构内半径为0.175mm,约为中心频率波长的0.292倍;在760-940GHz的频带内,慢波结构内半径为0.1mm,是中心频率处波长的0.392倍。该结构较大的径向尺寸有利于提高电子注通过率。这种结构负1次返波的耦合阻抗较小,基本上小于1Ω,很好解释了现有THz返波管的电子效率小于0.01%的事实。更多还原

【Abstract】 3-D electromagnetic simulation software is used to calculate the dispersion and interaction impedance of circular comb Slow-Wave Structure(SWS) which works for Terahertz(THz) Backward-wave Oscillators(BWO).The results show that the inner radius of SWS is 0.175mm in the band of 430-570GHz,and the inner radius of SWS is 0.1mm in the band of 760-940GHz.The large radius of SWS is a great help for improving beam transmission.The interaction impedance of fundamental backward wave of the SWS is smaller than 1Ω is a good explain to the truth that the electronic efficiency of THz BWO is smaller than 0.01%.更多还原