小型微波暗室的静区分析

静区性能是微波暗室综合性能的体现,也是暗室设计的关键。影响微波暗室静区性能的因素有暗室形状、吸波材料的布局及特性、天线辐射特性3个方面。利用几何光学方法,以电偶极子天线作为激励源,分析了矩形微波暗室静区电平分布规律。根据某厂家提供的4个频率(1gHz、2gHz、4gHz和8gHz)下吸波材料垂直入射反射率,对矩形暗室的静区电平分布进行了仿真计算。仿真结果表明,采用此方法能快速并准确的适用于矩形微波暗室静区的性能分析

等离子体隐身技术在航空领域的应用探索

阐述了研究等离子体隐身技术的重要意义和等离子体的基本概念以及等离子体隐身的基本原理和优点,并介绍了国内外等离子体隐身技术在飞行器等军事科技方面的研究现状和前景展望。福建省自然科学基金(1010014

Study on the Factors Influencing Efficiency of DBD Plasma

为提高真空下介质阻挡放电(dbd)的电源效率,考察其能效特性,利用正交设计法安排实验,研究了dbd放电等离子体激励电源的工作频率、占空比、放电环境气压和电极间隙对dbd放电能效的影响,通过方差分析寻找最优组合使电源效率最大化。研究结果表明,占空比是影响电源效率的主要因素,放电环境气压影响其次,加载电源频率和电极间隙大小对电源效率影响不显著。To improve the power efficiency used to generate the plasma by DBD(dielectric barrier discharge) technology in near vacuum condition,and to study power energy-efficiency characteristics,the influencing factors,such as the frequency and duty ratio of the plasma power,the air pressure in the DBD discharge container and the distance between electrodes,to the discharge efficiency has been researched through the orthogonal experiment method.The best combination of the factors may been found by variance analysis method to obtain maximize the power efficiency.The experiment results show that duty ratio is the primary factor affecting the power efficiency,the influence caused by air pressure is secondary,the frequency of the power and electrode distance have a little prominent effect to the power efficiency.福建省自然科学基金(A1010014)资