高功率毫米波绕射辐射振荡器高频特性研究
Study on highfrequency characteristics of highpower millimeterwave diffraction radiation generator
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摘要: 讨论了高功率毫米波绕射辐射振荡器的高频特性。利用线性理论和PIC模拟相结合的方法对器件的高频特性进行了比较仔细的分析。分析结果表明,合理地选择电子注的参量(电流、电压)及高频结构的尺寸(波纹深度、半径、周期等)可以获得较高的输出功率并且具有较好的频谱纯度。Abstract: The highfrequency characteristics of highpower millimeterwave diffraction radiation generator are analyzed in detail using both linear theory and PIC method. This paper presents a method of mode selection. Results show that highpower millimeter wave with good frequency spectrum purity can be obtained by reasonably adjusting the operating parameters such as the electron beam's current, voltage and the highfrequency structure's depth, radius, period. Through analyses it can be found that the device with h=0.05cm can generate singlefrequency and highpower radiation of 8mm wave band. Studies indicate that diffraction radiation generator with simpler structure can also generate singlefrequency and highpower radiation of millimeterwave band.
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