Simulation on W-band sheet beam rectangular waveguide grating backward-wave oscillator
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摘要: 提出并研究了一种带状电子注矩形单栅返波振荡器。首先研究了矩形单栅慢波结构的色散特性和耦合阻抗特性，然后粒子模拟并优化设计了带状注矩形单栅高频结构，预群聚腔及输出一体化结构。研究结果表明：利用电压200 kV、电压2 kA、截面为24 mm0.5 mm的带状电子注，驱动该矩形单栅返波振荡器，能够产生42 MW的输出功率，工作频率86 GHz，效率为10.5%。Abstract: The vacuum electronic device with sheet beam driven rectangular waveguide gratings is a small size, high gain, easy to fabricated device. It has potential to produce high power terahertz radiation. This paper proposes a novel sheet beam high power device. The dispersion characteristics of the rectangular waveguide grating slow wave structure are analyzed. The coupling impedance is studied in detail. And a W-band sheet beam rectangular waveguide grating backward-wave oscillator(BWO) is simulated. The optimized BWO can produce 42 MW at frequency 86 GHz, driven by a 200 kV, 2kA, 24 mm0.5 mm sheet electron beam. The efficiency is 10.5%.
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