提出了一种基于史密斯-帕赛尔效应的太赫兹振荡器，该器件由电子枪、调制腔、输出腔、收集极等部分构成。在器件调制腔中,电子注的速度调制通过史密斯-帕赛尔效应完成的,当群聚电子注通过输出腔时,群聚电子注会在输出腔的间隙处激励起高频电场,该高频电场会使电子注的一部分动能转换为高频能量,并完成太赫兹振荡.模拟发现：当金属光栅的空间周期为0.6 mm、电子注能量为100 keV时,利用史密斯-帕赛尔效应调制的太赫兹振荡器可以输出频率为349.017 GHz和346.324 GHz、功率谱密度接近4 kW/GHz、最大输出峰值功率超过2 kW的太赫兹波.

A terahertz oscillator based on Smith-Purcell effect was presented. The terahertz oscillator is composed of an electron gun, a modulation cavity, an output cavity and a collector. In the modulation cavity of the novel terahertz oscillator, electron beam was modulated by Smith-Purcell effect. As bunching electron beam passes through output cavity, high-frequency electric field is produced in the gap of output cavity. By the high-frequency electric field, part of the kinetic energy of electron beam can be transformed into the energy of high-frequency field, and the terahertz radiation can be emitted. The simulation results show that when the length of the grating period is 0.6 mm, and energy of electron beam is 100 keV, the terahertz radiation frequency at 349.017 GHz and 346.324 GHz , power spectral density approach 4 kW/GHz, and maximum output peak power over 2 kW can be generated in the terahertz oscillator based on Smith-Purcell effect.