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ID:37500587
大小:2.62 MB
页数:107页
时间:2019-05-24
《高功率微波传输线及模式变换研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、电子科技大学博士学位论文高功率微波传输线及模式变换研究姓名:牛新建申请学位级别:博士专业:物理电子学指导教师:李宏福2003.4.1中文摘要4.针对半径渐变微扰波导模式变换器进行了详细的数值模拟和设计。采用相应的相位重匹配技术,可设计出高效、宽带、紧凑的过模波导TEoi—TE0l、TM0n—TM01以及采用中间过度模式的TMol—TEll模式转换器。同时为“十·五”军事预研项目设计出高性能TEol~TEll模式转换器。5.首次详细数值研究了回旋放大器件的新型电子枪端微波输入结构,采用准光模式变换对电子枪阳极进行了优化设计,使电子枪和模式传输与转换的作用融为一
2、体。同时考虑了阳极对电子注的影响。准光模式变换器主要采用矢量绕射理论和几何光学理论,并结合两种理论设计复杂反射曲面。应用分小块的方法,调整入射波束的相位和方向,提高输出波束的质量和准光模式转换的效率。关键词:高功率毫米波回旋管过模波导耦合波方程模式变换器相位重匹配数值计算电子枪准光模式变换器电子科技大学博士论文AbstractGyro—devicesarenewimportanttypeofmillimeterwavedevicewiththecharacteristicsofhighpeakpower,highaveragepower,highgain,h
3、ighefficiencyandsuitabilitybandwidthandsoon.It’sverysuitforthepowersourceofmillimeterwavehigheapabilityradar,phasearrayradar.millimeterwavecommunication,electroniccounterandothersystems.Microwavetransmissionandmodetransformersisimportantpartofgyrotron.Theenergyofgyrotroncanbetransm
4、issionandradiatewithrequisitemethods.Underthisbackground,supportedbythe。95Plan”pre—studyitemand‘115Plan”pre—studyitem“863Plan’’themicrowavetransmissionandmodeconverterofhighpowermicrowavedeviceandgyrotronarestudiedwithcompletetheoryindepthandnumericalsimulation.Themodeconverterwith
5、designandmachiningapplyintheexperimentofinstituteofnorthwestnucleustechn0109ysuccessfully.Theworkandcontributeofthispaperisthefol】ow:1·Modecouplingwiththebentofaxisinacircularwaveguideandgradualradiuschangesofthewaveguideinovermodedwaveguideisstudied.0nthebaseofcouplingwavetheory,o
6、utspreadtheoryofperpendicularfunctionisappiiedtounwrapthewaveguideinnerfieldwiththeseriesformofelectricwaveandmagnetismwave·Thecouplingwaveequationsandcurrentlyexpressionofcouplingcoefficjentjseduced2·Theinfluenceofallkindsofdistortionsofwaveguideinhighpowermicrowavesystemisstudied
7、,andtherealizationconditionofenergycompleteconversionisanalysisindetail,Optimalarithmeticandthemethodtos01vecouplingwaveequationwithnumericalvalueisdiscussedinthedifferentconditionTheMathematicmodelsandthenumericalsimulationmethodshavebeenprovedoutdirectlyorindirect.3·Theoptimalana
8、lysisofconstantcurvaturean
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