太赫兹多注级联折叠波导行波管放大器的研究

项目名称： 太赫兹多注级联折叠波导行波管放大器的研究

项目编号： No.11475182

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 薛谦忠

作者单位： 中国科学院电子学研究所

项目金额： 84万元

中文摘要： 随着微加工技术和高电流密度阴极技术的发展，应用于机载、星载平台的太赫兹放大器的研究已成为电真空技术领域的热点课题。多注级联折叠波导慢波电路采用多级放大，既提高了增益，又大大地缩短了电子束通道的长度，降低了电子束的截获，解决了太赫兹频段细长电子束通道加工和高电流密度电子束聚焦、传输这一具有共性且为瓶颈的技术问题。以微型级联多注折叠波导慢波电路为核心的行波管放大器具有高功率、高增益、宽频带、轻量紧凑的优点，有望成为THz成像雷达、太赫兹通信系统的相干功率源。 本项目拟开展级联折叠波导行波管放大器慢波电路注波互作用机理研究，建立放大器的设计理论；开展多注电子光学系统的设计研究，建立阴极发射、传输和收集的电子光学系统的实用化物理模型，解决实现产生电子束发射、高压缩比的电子枪结构，小型化有效引导、高效传输和收集电子束的磁场系统的关键问题；开展微加工工艺技术中瓶颈问题研究，建立可行技术途径。

中文关键词： 太赫兹；多注；折叠波导；行波管；放大器

英文摘要： With the development of micro machining technology and high current density cathode technology,the reseach of terahertz amplifier used in airbrone and spaceborne platforms has become one of the hot topics in vacuum electronic field.The cascaded multi-beam folded waveguide slow-wave circuit is used in multi-stage amplifier, which improves the gain, shortens the length of electron beam channel and lowers intercepted electron beam. The common and bottleneck problem in terahertz band, slender electron beam channel machining, high current electron beam focus and transmission, is also solved. Traveling wave tube amplifier with miniature cascaded multi-beam folded waveguide slow-wave circuit as the core part has great potential as the coherent power source of THz imaging radar and THz communication system for advantages of high-power capability, high gain, broadband, lighter weight and smaller volume. In this project, the transmission characteristic of cascaded folded waveguide high frequency slow-wave circuit and beam-wave interaction mechanism are studied; A practical physical model of the multi-beam electron optics system will be built, and the key problems of electron gun structure with electron beam emission ,high compression ratio, and magnetic system with electron efficient guide, effective transmission and collection will also be solved; And an available technical approach will be established to solve the bottleneck problem of micro machining technology.

英文关键词： teralertz;multipe-beam;folded waveguide;traveling-wave tube;amplifier