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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Simulation of a G-band sheet beam backward wave oscillator with double staggered metallic rod array
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Simulation of a G-band sheet beam backward wave oscillator with double staggered metallic rod array

机译：具有双交错金属杆阵列的G波段片状束后向振荡器的仿真

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摘要

Backward wave oscillators (BWO) are promising high-power portable radiation sources in the terahertz frequency range. A G-band (140-220 GHz) sheet beam BWO based on a double staggered metallic rod array as the slow wave structure (SWS) has been designed and presented in this paper. The novel SWS allowed extension of the interaction area for the sheet beam with a uniform electric field if the height of the rod array is properly chosen. This could alleviate beam instability problems in the sheet beam transportation and potential parasitic oscillations. Moreover, a relatively broad bandwidth can be achieved due to its special dispersive properties. Particle-in-cell simulation had predicted that the G-band sheet beam BWO with the improved non-uniform double staggered metallic rod array can achieve output power of over 110 W in a continuous frequency tuning range of 186.3-227.2 GHz (relative bandwidth 20%) with a maximum electronic efficiency of 2.8% by using a 200 mA sheet beam and adjusting the beam voltage from 20 to 40 kV.
机译：后向波振荡器（BWO）在太赫兹频率范围内有望成为大功率便携式辐射源。本文设计并提出了一种基于双交错金属棒阵列作为慢波结构（SWS）的G波段（140-220 GHz）薄板光束BWO。新颖SWS允许片材束与如果杆阵列的高度适当地选择一个均匀的电场的相互作用区域的扩展。这可以减轻片状光束传输中的光束不稳定性问题和潜在的寄生振荡。此外，由于其特殊的分散特性，可以实现相对较宽的带宽。单元中的粒子模拟预测，具有改进的非均匀双交错金属棒阵列的G带薄板光束BWO在186.3-227.2 GHz的连续频率调谐范围内（相对带宽20可以达到110 W以上的输出功率） ％），通过使用200 mA薄板束并将束电压从20 kV调节到40 kV，最大电子效率为2.8％。

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