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准光辐射器是回旋管内置准光模式变换器的重要组成部分. 采用几何光学理论分析了圆波导中高阶旋转模式电磁波的准光传输特性,分析了螺旋非规则光滑圆波导中电磁波的传输和模式耦合机理,推导任意扰动的圆波导内模式间的耦合波方程及其相关系数. 根据耦合波理论编制准光模式变换器的数值计算程序,分析了Denisov型辐射器内激励起的波导模式的功率分布规律和波导壁上的纵向磁场分布,以及辐射器螺旋切口的辐射场的分布和辐射波束的特征,并采用三维全波仿真软件进行对比模拟. 优化了工作频率为94 GHz,TE6,2模式的Denisov型辐射器,其输出功率效率高达98%;加工成实物并内置于回旋振荡内进行热测实验,在回旋管的输出窗处获得了高斯分布的烧斑图. 此结果表明测试结果与计算基本一致.The launcher is an important component of the gyrotron builded-in quasi optical convertor. The propagate characteristics of high order modes in volume waveguide are analyzed in this paper based on geometric optical theory. The waveguide coupling equations and the corresponding coupling coefficients of the modes in the perturbation waveguide are derived based on the mode coupling theory. The power distribution in the perturbation waveguide and the field on the wall are analyzed by the numerical calculation code which is written in MATLAB language. The 3D simulation software can be used to verity the numerical result. As an example, a Denisov launcher of 94 GHz, TE6,2 is designed, and the numerical simulation result shows that the conversion efficiency is more than 98%, The hot-test experimental results show that the profile of output field is well consistent with the numerical result.
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Keywords:
- quasi-optical /
- mode converter /
- Gauss mode /
- mode coupling theory
[1] Thumm M 2005 Infrar. Millim. Waves 26 483
[2] Thumm M 2011 State-of-the-Art of High Power Gyro-Devices and Free Electron Masers (Karlsruhe: Kit Scientific Report) pp16-29
[3] Ogawa I, Idehara T, Nagao K 2005 Conference Digest Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics Williamsburg, Virginia, September 19-23, 2005 p379
[4] Jin J B, Piosczyk B, Thumm M, Rzesnicki T, Zhang S 2006 IEEE Trans. Plasma Sci. 34 1508
[5] Xu S X, Wang B, Liu P K, Geng Z H 2010 The 11th International Vacuum Electronics Conference Monterey, California, April 24-26, 2010 p355
[6] Ragini J, Kartikeyana M V, Thumm M 2009 The 34th International Conference on Infrared, Millimeter, and Terahertz Waves Busan, Korea, September 21-25, 2009 pp21-25
[7] Thumm M, Yang X K, Arnold A, Guenter D, Georg M, Julius P, Dietmar W 2005 IEEE Trans. Electron Dev. 52 818
[8] Rzesnicki T, Jin J, Piosczyk B, Thumm M, Michel G, Wagner D 2005 Conference Digest Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics Williamsburg, Virginia, September 19-23, 2005 pp519-520
[9] Blank M, Kreischer M, Temkin K E 1994 Int. Electron Dev. p259
[10] Wang H, Shen W Y, Geng Z H, Xu S X, Wang B, Du C H, Liu P K 2013 Acta Phys. Sin. 62 238401 (in Chinese) [王虎, 沈文渊, 耿志辉, 徐寿喜, 王斌, 杜朝海, 刘濮鲲 2013 62 238401]
[11] Jin J, Thumm M, Piosczyk B, Kern S, Flamm J, Rzesnicki T 2009 IEEE Trans. Microw. Theo. Techniq. 57 1661
[12] Liu D W, Yuan X S, Yan Y 2009 Chin. Phys. B 18 3049
[13] Chen X L, Zhao Q, Liu J W 2012 Acta Phys. Sin. 61 074104 (in Chinese) [陈旭霖, 赵青, 刘建卫 2012 61 074104]
[14] Lei C J, Yu S, Li H F 2012 Acta Phys. Sin. 61 180202 (in Chinese) [雷朝军, 喻胜, 李宏福 2012 61 180202]
[15] Xia M Z, Liu D G, Yan Y 2013 Acta Phys. Sin. 62 111301 (in Chinese) [夏蒙重, 刘大刚, 鄢扬 2013 62 111301]
[16] Du C H, Xue Q Z, Liu P K 2010 Chin. Phys B 19 048703
[17] Niu X J, Li H F, Yu S, Xie Z L, Yang S W 2002 Acta Phys. Sin. 51 2291 (in Chinese) [牛新建, 李宏福, 喻胜, 谢仲怜, 杨仕文 2002 51 2291]
[18] Du C H, Liu P K, Xue Q Z 2010 Chin. Phys. B 19 048703
[19] Zhang L, Fu X L, Lei M, Wang A T, Gu C, Rao R Z 2014 Chin. Phys. B 23 038101
[20] Jin J B 2005 Ph. D. Dissertation (Chengdu: Southwest Jiaotong University) (in Chinese) [金践波 2005 博士学位论文 (成都: 西南交通大学)]
[21] Bogdashov A A, Denisov G G 2004 Radiophys. Quantum Electron. 47 283
[22] Doane J L 1985 Infrar. Millim. Waves 13 123
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[1] Thumm M 2005 Infrar. Millim. Waves 26 483
[2] Thumm M 2011 State-of-the-Art of High Power Gyro-Devices and Free Electron Masers (Karlsruhe: Kit Scientific Report) pp16-29
[3] Ogawa I, Idehara T, Nagao K 2005 Conference Digest Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics Williamsburg, Virginia, September 19-23, 2005 p379
[4] Jin J B, Piosczyk B, Thumm M, Rzesnicki T, Zhang S 2006 IEEE Trans. Plasma Sci. 34 1508
[5] Xu S X, Wang B, Liu P K, Geng Z H 2010 The 11th International Vacuum Electronics Conference Monterey, California, April 24-26, 2010 p355
[6] Ragini J, Kartikeyana M V, Thumm M 2009 The 34th International Conference on Infrared, Millimeter, and Terahertz Waves Busan, Korea, September 21-25, 2009 pp21-25
[7] Thumm M, Yang X K, Arnold A, Guenter D, Georg M, Julius P, Dietmar W 2005 IEEE Trans. Electron Dev. 52 818
[8] Rzesnicki T, Jin J, Piosczyk B, Thumm M, Michel G, Wagner D 2005 Conference Digest Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics Williamsburg, Virginia, September 19-23, 2005 pp519-520
[9] Blank M, Kreischer M, Temkin K E 1994 Int. Electron Dev. p259
[10] Wang H, Shen W Y, Geng Z H, Xu S X, Wang B, Du C H, Liu P K 2013 Acta Phys. Sin. 62 238401 (in Chinese) [王虎, 沈文渊, 耿志辉, 徐寿喜, 王斌, 杜朝海, 刘濮鲲 2013 62 238401]
[11] Jin J, Thumm M, Piosczyk B, Kern S, Flamm J, Rzesnicki T 2009 IEEE Trans. Microw. Theo. Techniq. 57 1661
[12] Liu D W, Yuan X S, Yan Y 2009 Chin. Phys. B 18 3049
[13] Chen X L, Zhao Q, Liu J W 2012 Acta Phys. Sin. 61 074104 (in Chinese) [陈旭霖, 赵青, 刘建卫 2012 61 074104]
[14] Lei C J, Yu S, Li H F 2012 Acta Phys. Sin. 61 180202 (in Chinese) [雷朝军, 喻胜, 李宏福 2012 61 180202]
[15] Xia M Z, Liu D G, Yan Y 2013 Acta Phys. Sin. 62 111301 (in Chinese) [夏蒙重, 刘大刚, 鄢扬 2013 62 111301]
[16] Du C H, Xue Q Z, Liu P K 2010 Chin. Phys B 19 048703
[17] Niu X J, Li H F, Yu S, Xie Z L, Yang S W 2002 Acta Phys. Sin. 51 2291 (in Chinese) [牛新建, 李宏福, 喻胜, 谢仲怜, 杨仕文 2002 51 2291]
[18] Du C H, Liu P K, Xue Q Z 2010 Chin. Phys. B 19 048703
[19] Zhang L, Fu X L, Lei M, Wang A T, Gu C, Rao R Z 2014 Chin. Phys. B 23 038101
[20] Jin J B 2005 Ph. D. Dissertation (Chengdu: Southwest Jiaotong University) (in Chinese) [金践波 2005 博士学位论文 (成都: 西南交通大学)]
[21] Bogdashov A A, Denisov G G 2004 Radiophys. Quantum Electron. 47 283
[22] Doane J L 1985 Infrar. Millim. Waves 13 123
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