矩形波导中主模电磁波传播特性研究  

Propagation features of the dominant mode of the rectangular waveguide electromagnetic waves

作　　者：雷前召[1] 

机构地区：[1]渭南师范学院物理与电气工程学院,陕西渭南714000

出　　处：《电子设计工程》2011年第20期121-123,共3页Electronic Design Engineering

基　　金：陕西省自然科学基金项目(2011JM8020);渭南师范学院科研基金(11YKZ001)

摘　　要：矩形波导主模电磁波是波导传输中使用最多的模式。为了能深入了解其传播特征,从波导的截至波长入手,讨论了电磁波单模传播的条件,得出结论:主模传播需要电磁波波长和波导尺寸之间满足一定关系。推导出主模电磁波的场方程,利用该场方程,结合一定尺寸的矩形波导管,模拟出一定频率的主模电磁波分布图,进而总结了主模电磁波传播的主要特征。这些特征包括截至频率、波导管尺寸选择、波阻抗特征、波导相速、波导波长以及主模电磁波传输功率。掌握主模电磁波的这些特征,能够更有效利用和发挥其在实际应用中的价值。The dominant mode waveguide propagation is the most used one in the electromagnetic wave mode. In order to further understand its spread characteristics, starting from the waveguide cutoff wavelength, the conditions of single-mode transmission of electromagnetic waves were discussed, the conclusion： TE10 propagation needs that the electromagnetic wavelength and the waveguide dimensions meet certain relations. Then the electromagnetic waves equations of the dominant mode were derived; by using the equations, the distribution map for a certain frequency electromagnetic wave TE10 was simulated in a certain size rectangular waveguide; and then the main features of TE10 wave propagation were summarized. These features include that of the cutoff frequency, the selection of waveguide sizes, the impedance characteristic, the phase velocity and wavelength of a waveguide, and the transmission power of TE10 wave. Grasping these characteristics can make TE10 propagation playing a more effective role in its practical applications.

关 键 词：主模(TE10) 截至波长 波阻抗特征 波导相速 传输功率 

分 类 号：TN011[电子电信—物理电子学]