新型单脊矩形波导传输特性研究  

Research on transmission characteristics of a novel single-ridge rectangular waveguide

作　　者：陈小强[1] 逯迈[2] 薛德强[2] 

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070 [2]兰州交通大学光电技术与智能控制教育部重点实验室,甘肃兰州730070

出　　处：《光通信研究》2007年第5期67-69,共3页Study on Optical Communications

基　　金：甘肃省自然科学基金资助项目(3ZS042-B25-034);青蓝人才工程资助项目

摘　　要：文章利用亥姆霍兹方程的有限差分格式,研究了在新型单脊矩形波导中,脊在中心位置且几何尺寸变化时对传输特性的影响。计算了脊的尺寸变化时的截止波长cλ和单模带宽B(cλ/cλ1),并给出了TE10和TE11模式的场结构图以及变形对截止波长和单模带宽影响的相应曲线。通过与传统单脊矩形波导的对比,指出了新型单脊波导传输特性的优缺点。Using finite-difference method for the Helmholtz equation, this paper investigates the influence of the ridge in a novel single-ridge rectangular waveguide on the transmission characteristics of the waveguide when the ridge is in the central part and its dimensions vary. It calculates the cutoff wavelength λc and single-mode bandwidth B （λc/λc1 ） when the ridge dimensions vary and gives the field patterns of TE10 mode and TE11 mode and the curve corresponding to the relevant effects of the transfiguration. By comparing with the conventional waveguide, it points out the advantages and disadvantages of the new single-ridge rectangular waveguide.

关 键 词：亥姆霍兹方程 有限差分 传输特性 截止波长 单模带宽 场结构 

分 类 号：TN814[电子电信—信息与通信工程]