腔体形状对混响室内场均匀性的影响  

Effects of resonator shape on field uniformity in reverberation chamber excitated by HPM

作　　者：李爽[1] 王建国[1,2] 谢海燕[1] 陆希成[1] 

机构地区：[1]西北核技术研究所,陕西西安710024 [2]西安交通大学电子与信息工程学院,陕西西安710049

出　　处：《电波科学学报》2012年第3期598-603,636,共6页Chinese Journal of Radio Science

摘　　要：针对高功率微波(HPM)激励下的混响室,研究了不同腔体形状对混响室内电场分布的影响。根据理想封闭矩形腔体内电磁场表达式,分析了腔体形状对混响室内场特性的重要影响,并确立以时间窗为研究单元的统计计算方法描述混响室内的瞬态场特征。重点研究腔体形状对腔体内场均匀性的影响效果,主要对比电场的最大值、分布标准差以及各向同性等指标。研究结果表明:在矩形谐振腔中引入复杂结构能够降低场分布标准差,提高能流分布的均衡性,实现均匀的电磁场环境。The effects of resonator shape on the field uniformity in the reverberation chamber（RC）excited by high-power microwave（HPM）is studied.Firstly,the theoretical analysis of the electromagnetic modes in resonators shows that the re-sonator shape has important effects on the field uniformity.Then the statistical method named time-window is introduced to describe the characteristics of the tran-sient field.Finally,the influences of the shape on the field distribution is re-searched by comparison of the maximum of electric field,the standard deviation and the isotropy characteristics in three kinds of resonators.The simulation results show that the resonator with complex configurations can reduce the standard devia-tion and improve the field uniformity efficiently.Thus it is capable to realize of the uniform electromagnetic environment in complex cavity.

关 键 词：高功率微波 混响室 统计计算方法 场均匀性 

分 类 号：O441.4[理学—电磁学]