Simulation of 650 GHz sine waveguide backward wave oscillator
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摘要: 提出了一种利用正弦波导慢波结构设计的太赫兹频段大功率返波管的新方案。3维粒子模拟研究结果显示:在20 kV的工作电压和5 mA的驱动电流下，该返波管在645.9 GHz频率处将具有1.55 W的峰值功率输出，互作用效率为1.55%，频谱纯净，输出模式为TE10模。通过在15～25 kV之间进行电压调谐，可获得80 GHz的调谐带宽，且峰值输出功率都在1 W以上。Abstract: A 650 GHz watt-class backward wave oscillator has been proposed by using a sine waveguide slow-wave structure which possesses low loss and low reflection. In this letter, the three-dimensional particle-in-cell method is applied to predict the output performance of the backward wave oscillator. The investigation results show that, the backward wave oscillator can produce 1.55 W peak power output at 645.9 GHz under 20 kV operating voltage and 5 mA beam current. Its output mode is the TE10 mode. By tuning the operating voltage from 15 kV to 25 kV, the backward wave oscillator has over 1 W peak power output with a tuning bandwidth of 80 GHz.
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Key words:
- terahertz /
- backward wave oscillator /
- sine waveguide /
- slow wave structure
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