W波段准光模式变换器的设计

doi:10.3969/j.issn.0372-2112.2015.12.003

电子学报 ›› 2015, Vol. 43 ›› Issue (12): 2360-2367.DOI: 10.3969/j.issn.0372-2112.2015.12.003

W波段准光模式变换器的设计

张天钟, 喻胜, 张颜颜, 牛新建, 李宏福

电子科技大学物理电子学院, 太赫兹科学技术研究中心, 四川成都 610054

收稿日期:2014-04-23 修回日期:2014-05-29 出版日期:2015-12-25
- 通讯作者:
- 张天钟
- 作者简介:
- 喻胜男,1970年12月出生于湖北省襄樊市.1991年毕业于国防科技大学光电子技术专业,1996年与2002年在电子科技大学获物理电子学硕士及博士学位,现任电子科技大学物理电子学院教授,博士生导师.多年来从事回旋脉塞器件及相关应用的研究,"九五"、"十五"、"十一五"期间主持或参加了多项国家、部委重大项目的科研工作.获得国防科技进步二、三等奖及教育部自然科学二等奖,发表论文数十篇,目前的主要研究领域是:相对论电子学,大功率毫米波技术,毫米波回旋振荡器及放大器的理论与技术,微波、毫米波传输及模式变换.E-mail:yush@uestc.edu.cn;张颜颜 女,1986年9月出生于山东省河泽市.主要从事于太赫兹回旋管的研究.E-mail:470121607@qq.com;牛新建 男,1969年10月生于河南省新密市,教授,博士后,1998年以来一直从事高功率微波技术及回旋器件的研制工作,参研和主持了国家863计划项目、预研项目及国家支撑计划项目.在国内外重要学术刊物上发表论文40余篇.E-mail:niuxinjian@sohu.com;李宏福 男,1936年11月生于四川开县,教授,博导,国务院政府特殊津贴专家,获国家、部、省级奖十余项,发表论文100余篇.主要从事相对论电子学、微波电子学、高功率微波等领域的研究工作.
- 基金资助:
- 中央高校基本科研业务费专项资金 (No.E022050205)

Design a Quasi-Optical Mode Converter for W Band Gyrotron

ZHANG Tian-zhong, YU Sheng, ZHANG Yan-yan, NIU Xin-jian, LI Hong-fu

Terahertz Science and Technology Research Center, University of Electronics Science and Technology of China, Chengdu, Sichuan 610054, China

Received:2014-04-23 Revised:2014-05-29 Online:2015-12-25 Published:2015-12-25

摘要/Abstract

摘要：

准光模式变换器是大功率输出回旋管的关键部件.采用高转换效率的准光模式变换器可以横向输出电磁波,增大收集极的尺寸,提高回旋管的输出功率,提高整管效率.该文设计的回旋管内置准光模式变换器由Denisov辐射器天线和四个反射镜组成,输入频率为94GHz,模式为TE_6,2模.采用耦合波理论分析和优化了Denisov辐射器内的场分布,并根据矢量绕射理论编制数值模拟程序计算了各个反射镜上的场分布,其输出功率转换效率达97.2%.利用三维全波仿真软件feko6.0进行对比分析,最后加工所设计的结构并内置于回旋振荡管进行热测实验,结果表明其输出场分布与理论计算结果基本一致.

关键词: 准光, 模式变换, TE_6,2模式, 高斯模式

Abstract:

Quasi-optical mode convertor is an important component for a high-power gyrotron.The transverse area of collector in gyrotron can be increased and the wave beam can be separated from the electron beam with a high conversion efficiency quasi optical mode convertor.To improve the conversion efficiency of the whole gyrotron,a quasi optical mode convertor with small size must be used to high-efficiently convert the cavity mode to fundamental Gaussian beam.This paper presents a quasi-optical mode convertor for TE_6,2 94GHz gyrotron.The converter consists of a dimpled-wall Denisov launcher,a quasi-elliptical mirror,two parabolic mirrors and a plane mirror.The coupled-mode theory is used to analyze the operation of the pre-bunching waveguide launcher.The code of the vector diffraction theory is used to calculate the radiate fields of the mirrors.The efficiency of more than 97.2% is achieved for converting the rotating TE_6,2 mode at 94GHz into a fundamental Gaussian beam.Simulations with feko 6.0 are done to compare with the calculation result.The structures is fabricated and placed in the 94GHz gyrotron.Experimental measurements show that close agreement with theoretical predictions is obtained.

Key words: quasi-optical, mode converter, TE_6,2 mode, Gaussian mode

中图分类号:

O441.4

张天钟, 喻胜, 张颜颜, 牛新建, 李宏福. W波段准光模式变换器的设计[J]. 电子学报, 2015, 43(12): 2360-2367.

ZHANG Tian-zhong, YU Sheng, ZHANG Yan-yan, NIU Xin-jian, LI Hong-fu. Design a Quasi-Optical Mode Converter for W Band Gyrotron[J]. Acta Electronica Sinica, 2015, 43(12): 2360-2367.

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W波段准光模式变换器的设计

Design a Quasi-Optical Mode Converter for W Band Gyrotron

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