红外与毫米波学报, 2014, 33 (4): 430, 网络出版: 2014-09-01  

94GHzTE5,3准光辐射器

A quasi-optical mode launcher for 94 GHz, TE5,3 gyrotrons
作者单位
电子科技大学 物理电子学院,四川 成都610054
摘要
基于耦合波理论和相位匹配技术,对准光辐射器的传统设计方法进行了改进,使其适用于低阶模式的设计.通过调节耦合时模式间的相位,在切口处实现了具有高斯场分布的理想模式组合.利用这一方法,优化设计了一个94 GHz, TE5,3回旋管准光辐射器.数值模拟结果表明,设计的辐射器在切口处形成了一个良好的束斑,边馈电平达到-30 dB,口径场高斯含量高于98%.
Abstract
Based on the coupled-wave theory and the phase-matching technique, an improved method for low-order quasi-optical mode launcher is presented. Adjusting the phase difference between the working mode and its satellite modes, an ideal mixture mode with the features of Gaussian field distribution was obtained. Using the proposed method, a 94 GHz TE5,3 quasi-optical mode launcher was synthesized. The numerical calculation shows that the difference between the edge and peak values of field intensity reaches 30 dB. A well-focused field at the aperture with a Gaussian mode content of more than 98% can be obtained,which will reduce drastically the diffraction losses and reflection of power from the cuts.
参考文献

[1] Kumar N, Singh U, Singh T P, et al. A review on the applications of high power, high frequency microwave source: Gyrotron[J]. Journal of Fusion Energ, 2011, 30(4): 257-276.

[2] Thumm M K, Kasparek W. Passive high-power microwave components[J]. IEEE Transactions on Plasma Science, 2002, 30(3): 755-786.

[3] Manfred K A Thumm. Recent developments on high-power gyrotrons—introduction to this special issue[J]. Journal of Infrared, Millimeter, and Terahertz Wave, 2011,32(3):241-252.

[4] Vlasov S N, Orlova I M. Quasioptical transformer which transforms the waves in a waveguide having a circular cross section into a highly directional wave beam [J], Radiophysics and Quantum Electronics.1974, 11(7): 115-119.

[5] Denisov G G, Kuftin A N, Malygin V I, et al. 110 GHz gyrotron with built-in high efficiency converter[J]. International Journal of Electronics, 1992, 72(5): 1079–1091.

[6] Jin J B. Quasi-opticalmode converter for a coaxial cavity gyrotron[D]. Southwest jiaotong university, 2005.

[7] Chirkov A V, Denisov G G, Kulygin M L, et al . Use of Huygens' principle for analysis and synthesis of the fields in oversized waveguides[J], Radiophysics and Quantum Electronics, 2006, 49(5):344-353.

[8] Tomasz R, Jin J B, Bernard P, et al. 170 GHz, 2MW, coaxial cavity gyrotron: design and experimental verification of the RF output system[C].Proc. 6th International Vacuum Electronics Conference IVEC 2005, Noordwijk, Netherland, 2005:303-306.

[9] Minami R, Kariya T, Imal T, et al. Development of 28 GHz and 77 GHz, Mega-Watt gyrotrons for fusion devices[J]. Journal of Infrared, Millimeter and Terahertz Waves,2011, 32(3):295-310.

[10] LI Hao, WANG Hai-Yang, LI Tian-Ming, et al. W-band quasi-optical TE62-TEM00 mode converter[J], High Power Laser and Particle Beams(李浩,汪海洋, 李天明,等, W波段TE61-TEM准光模式变换器. 强激光与粒子束), 2011, 23(11): 3112-3116.

[11] WANG Bin, LIU Pu-Kun, GENG Zhi-Hui. Investigation on radiation from a vlasov mode converter for w-band whispering gallerymode gyrotron[J]. Journal of Infrared and Millimeter Waves (王 斌, 刘濮鲲,耿志辉. W波段边廊模回旋管Vlasov模式变换器的辐射. 红外与毫米波学报), 2010, 29(2): 100-113.

[12] NIU Xin-Jian, GU Ling, YU Xin-Hua, et al. A TE6,2 94 GHz inner quasi-optical mode converter[J]. Journal of Infrared and Millimeter Waves(牛新建, 顾玲, 于新华,等, 94 GHz TE6,2模内置准光模式变换器. 红外与毫米波学报), 2011, 30(5): 429-445.

[13] ZHANG Wei, Study of Denisov launcher and waveguide polarizer. Chengdou[D]. University of electronic science and technology of China (张伟.Denisov辐射器与波导圆极化器技术研究.成都:电子科技大学),2010.

[14] Bogdashov A A, Denisov G G. Asymptotic theory of high-efficiency converters of higher-order waveguide modes into eigenwaves of open mirror lines[J]. Radiophysics and Quantum Electronics, 2004, 47(4): 283-296.

[15] Thumm M. High power mode conversion for linearly polarized HE11 hybrid mode output[J]. Int. J. Electron., 1982, 61(6):1135-1153.

[16] http://www.feko.info/

吴泽威, 李浩, 徐建华, 李天明, 李家胤. 94GHzTE5,3准光辐射器[J]. 红外与毫米波学报, 2014, 33(4): 430. WU Ze-Wei, LI Hao, XU Jian-Hua, LI Tian-Ming, LI Jia-Yin. A quasi-optical mode launcher for 94 GHz, TE5,3 gyrotrons[J]. Journal of Infrared and Millimeter Waves, 2014, 33(4): 430.

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