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In this paper, we present an optimal design of TE0n nonuniform ripple-wall mode converter in circular waveguide. The research work is based on the general coupled wave theory and numerical optimization method. The results of numerical calculation are in good agreement with those of simulation by HFSS. Compared with traditional TE0n mode converter of periodic waveguide perturbations, the TE0n nonuniform ripple-wall mode converter can achieve a high mode conversion efficiency with less corrugated periods. The length of the converter is shortened nearly by a half and the operating bandwidth with over 95% mode conversion is increased by 150%. The research work provides an important theoretical reference and a physics model for designing high power gyrotron mode converter with small axial size, wide operating bandwidth and high conversion efficiency.
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Keywords:
- gyrotrons /
- mode converters /
- nonuniform ripple-wall /
- coupled wave equations
[1] Yan Y, Xia L C, Wu J Q, Wu F 2009 Journal of University of Electronic Science and Technology of China 38 372 (in Chinese) [鄢扬, 夏连城, 吴坚强, 吴峰 2009 电子科技大学学报 38 372]
[2] Li H F, Du P Z, Yang S W, Xie Z L, Zhou X L, Wan H R,Huang Y 2000 Acta Phys. Sin. 49 312(in Chinese) [李宏福, 杜品钟, 杨仕文, 谢仲怜, 周晓岚, 万洪蓉, 黄勇 2000 49 312]
[3] Yu S, Li H F, Xie Z L, Luo Y 2001 Acta Phys. Sin. 50 1979 (in Chinese) [喻胜, 李宏福, 谢仲怜, 罗勇 2001 50 1979]
[4] Luo Y, Li H F, Xie Z L, Yu S, Deng X, Zhao Q, Xu Y 2004 Acta Phys. Sin. 53 229 (in Chinese) [罗勇, 李宏福, 谢仲怜, 喻胜, 邓学, 赵青, 徐勇 2004 53 229]
[5] Dragone C 1977 The Bell System Technical Journal 56 835
[6] Thumm M, Erckmann V, Janzen G, Kasparek W, Muller G, Schuller P G, Wilhelm R 1985 Int. J. Infrared millim. Waves 6 459
[7] Levine J S 1984 Int. J. Infrared and Millim. Waves 5 937
[8] Thumm M 1986 Int. J. Electron. 6 1135
[9] Kumric H, Thumm M, Wilhelm R 1988 Int. J. Electron. 64 77
[10] Kovalev N F, Orlova I M, Petelin M I 1968 Radio Phys. Quant. Electron. 11 783
[11] Thumm M 1984 Int. J. Electron. 57 1225
[12] Buckley M J, Stein D A, Vernon R J 1991 IEEE Trans. MTT 39 1301
[13] Buckley M J, Ronald J V 1990 IEEE Trans. MTT 38 712
[14] Lawson W, Esteban M, Raghunathan H, Hogan B P, Bharathan K 2005 IEEE Trans. MTT 53 372
[15] Sun X, Zhao Q, Li H F 2008 Acta Phys. Sin. 57 2130 (in Chinese) [孙旭, 赵青, 李宏福 2008 57 2130]
[16] Tang S R, Yang Z Q, Lan F 2008 Journal of Microwaves 24 78 (in Chinese) [唐世荣, 杨梓强, 兰峰 2008 微波学报 24 78]
[17] Niu X J, Gu L, Yu X H, Li H F 2011 Acta Electron. Sin. 39 1947 (in Chinese) [牛新建, 顾玲, 与新华, 李宏福 2011 电子学报 39 1947]
[18] 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]
[19] Chen L W, Niu X J, Li X Y, Sun M 2004 Journal of Infrared and Millimeter Waves 23 51 (in Chinese) [陈立伟, 牛新建, 李晓燕, 孙敏 2004 红外与毫米波学报 23 51]
[20] Li H F, Thumn M 1991 Int. J. Electron. 71 827
[21] Li H F, Thumn M 1991 Int. J. Electron. 71 333
[22] Niu X J, Li H F, Yu S, Xie Z L 2002 High Power Laser and Particle Beams 14 911 (in Chinese) [牛新建, 李宏福, 喻胜, 谢仲怜 2002 强激光与粒子束 14 911]
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[1] Yan Y, Xia L C, Wu J Q, Wu F 2009 Journal of University of Electronic Science and Technology of China 38 372 (in Chinese) [鄢扬, 夏连城, 吴坚强, 吴峰 2009 电子科技大学学报 38 372]
[2] Li H F, Du P Z, Yang S W, Xie Z L, Zhou X L, Wan H R,Huang Y 2000 Acta Phys. Sin. 49 312(in Chinese) [李宏福, 杜品钟, 杨仕文, 谢仲怜, 周晓岚, 万洪蓉, 黄勇 2000 49 312]
[3] Yu S, Li H F, Xie Z L, Luo Y 2001 Acta Phys. Sin. 50 1979 (in Chinese) [喻胜, 李宏福, 谢仲怜, 罗勇 2001 50 1979]
[4] Luo Y, Li H F, Xie Z L, Yu S, Deng X, Zhao Q, Xu Y 2004 Acta Phys. Sin. 53 229 (in Chinese) [罗勇, 李宏福, 谢仲怜, 喻胜, 邓学, 赵青, 徐勇 2004 53 229]
[5] Dragone C 1977 The Bell System Technical Journal 56 835
[6] Thumm M, Erckmann V, Janzen G, Kasparek W, Muller G, Schuller P G, Wilhelm R 1985 Int. J. Infrared millim. Waves 6 459
[7] Levine J S 1984 Int. J. Infrared and Millim. Waves 5 937
[8] Thumm M 1986 Int. J. Electron. 6 1135
[9] Kumric H, Thumm M, Wilhelm R 1988 Int. J. Electron. 64 77
[10] Kovalev N F, Orlova I M, Petelin M I 1968 Radio Phys. Quant. Electron. 11 783
[11] Thumm M 1984 Int. J. Electron. 57 1225
[12] Buckley M J, Stein D A, Vernon R J 1991 IEEE Trans. MTT 39 1301
[13] Buckley M J, Ronald J V 1990 IEEE Trans. MTT 38 712
[14] Lawson W, Esteban M, Raghunathan H, Hogan B P, Bharathan K 2005 IEEE Trans. MTT 53 372
[15] Sun X, Zhao Q, Li H F 2008 Acta Phys. Sin. 57 2130 (in Chinese) [孙旭, 赵青, 李宏福 2008 57 2130]
[16] Tang S R, Yang Z Q, Lan F 2008 Journal of Microwaves 24 78 (in Chinese) [唐世荣, 杨梓强, 兰峰 2008 微波学报 24 78]
[17] Niu X J, Gu L, Yu X H, Li H F 2011 Acta Electron. Sin. 39 1947 (in Chinese) [牛新建, 顾玲, 与新华, 李宏福 2011 电子学报 39 1947]
[18] 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]
[19] Chen L W, Niu X J, Li X Y, Sun M 2004 Journal of Infrared and Millimeter Waves 23 51 (in Chinese) [陈立伟, 牛新建, 李晓燕, 孙敏 2004 红外与毫米波学报 23 51]
[20] Li H F, Thumn M 1991 Int. J. Electron. 71 827
[21] Li H F, Thumn M 1991 Int. J. Electron. 71 333
[22] Niu X J, Li H F, Yu S, Xie Z L 2002 High Power Laser and Particle Beams 14 911 (in Chinese) [牛新建, 李宏福, 喻胜, 谢仲怜 2002 强激光与粒子束 14 911]
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