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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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