充等离子体圆柱波导中低频模式特性分析  

Characteristics of low-frequency modes in a cylindrical waveguide filled with plasma

作　　者：谢鸿全[1] 刘濮鲲[2] 

机构地区：[1]西南科技大学理学院,四川绵阳621010 [2]中国科学院电子学研究所,北京100080

出　　处：《哈尔滨工业大学学报》2006年第9期1590-1593,共4页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(10347009);四川省教育厅自然科学基金资助项目(2003B019)

摘　　要：利用等离子体流体模型和线性场理论,分别导出了等离子体均匀填充和无限薄环形填充两种条件下,圆柱波导中电磁波传播的色散方程,并分别数值计算了其等离子体低频模式所满足的色散关系.研究发现,在无限薄环形等离子体填充条件下,低频等离子体模式与均匀填充情况有很大差别,不再有无穷多条低频模式的色散曲线,而且其截止频率也不再受到等离子体频率的限制.A cylindrical waveguide filled with an infinitely thin annular plasma or uniform plasma is immersed in a strong longitudinal magnetic field. By means of fluid model and linear field theory, the dispersion equations of the electromagnetic wave propagation along the system in two different plasma - filling cases are derived, respectively. The dispersion characteristics of low- frequency modes in two cases are analyzed accordingly. It is found that the frequency of the low - frequency mode couldn＇ t be confined by plasma oscillation frequency and only a dispersion curve of low - frequency mode lies in the case of the infinitely thin annular plasma - filling

关 键 词：等离子体 圆柱波导 低频模式 色散关系 

分 类 号：TN128[电子电信—物理电子学] O539[理学—等离子体物理]