基于人工电磁媒质的小型化高功率微波辐射源

项目名称： 基于人工电磁媒质的小型化高功率微波辐射源

项目编号： No.61471091

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 段兆云

作者单位： 电子科技大学

项目金额： 87万元

中文摘要： 小型化高功率微波辐射源在军用和民用方面都具有极其重要的应用价值。为了实现器件的小型化同时提高其输出功率和电子效率，本项目基于反向切伦科夫辐射机理，提出一种适合真空电子器件的亚波长、全金属、具有对称特性的单介电常数人工电磁媒质，利用该人工电磁媒质构建一种全新的慢波结构。用有效媒质理论研究人工电磁媒质的谐振特性和电磁参数等基本材料特性；用电磁理论研究其色散特性、耦合阻抗和衰减常数等高频特性；建立一维的电子注圆盘物理模型，用非线性理论研究注-波互作用效应。提出产生相干辐射的起振条件和提高输出功率和电子效率的有效方法。通过对该项目的深入研究，为发展新型的小型化高功率微波辐射源奠定坚实的理论和技术基础。

中文关键词： 真空微波源；高功率微波源；真空器件；人工电磁媒质

英文摘要： Miniaturized, high power microwave radiation sources have very important applications in the military and civil fields.In order to realize the miniaturization and to improve the high power and electron efficiency,we propose a sub-wavelength, symmetrical, all-metal metamaterial with the single negative permittivity,which is suitable for the vacuum electron devices, and make use of this metamaterial to build a novel slow wave structure based on the reversed Cherenkov radiation.We use the effective medium theory to study the basic material properties such as resonance and materal parameters, adopt the electromagnetic theory to analyze the high-frequency characterizations such as dispersion,interaction impedence and attenuation constant, and set up one dimensional electron beam disk model and then use the nonlinear theory to study the beam-wave interation effect.Thus, we propose the oscillating condition for the coherent radiation and also a new approach to improving the output power and electron efficiency. This research can establish solid theoretical and technological foundations for the miniaturized, high power microwave radiation sources.

英文关键词： Vacuum Microwave Sources;High Power Microwave Sources;Vacuum Electron Devices;Metamaterial