脊位于窄边的四种加载介质波导传输特性的有限元计算  

Finite Element Computation of Four Types of Dielectric-Loaded Waveguides with Ridge on The Short Side

作　　者：孙海[1] SUN Hai(School of Mathematics and Informational Sciences,Leshan Normal University,Leshan 614000,CHN)

机构地区：[1]乐山师范学院数学与信息科学学院

出　　处：《半导体光电》2019年第6期796-801,共6页Semiconductor Optoelectronics

基　　金：四川省教育厅重点项目(16ZA0307);乐山师范学院博士启动项目(Z1326);乐山师范学院国家自然科学基金培育项目(Z1419)

摘　　要：运用矢量有限元方法对脊位于窄边的四种加载介质双脊波导的主模截止波长和单模带宽特性进行了计算和分析,四种波导分别为脊位于窄边的加载介质双脊矩形波导、加载介质双脊梯形波导、加载介质双脊V形波导以及加载介质双脊椭圆形波导。计算结果表明,脊位于窄边的四种加载介质双脊波导的两种传输特性总体相似,和脊位于宽边相比,脊位于窄边的主模归一化截止波长和单模带宽总体小很多,且脊位于宽边时的特性变化趋势比脊位于窄边时剧烈。这些计算结果将有助于微波器件及微波系统的设计。The edge-based finite element method was introduced to analyze the cutoff wavelength of the dominant mode and single-mode bandwidth of four types of dielectric-loaded double ridge waveguides with ridges on the short side.The four types of waveguides are double rectangle-ridge waveguides,double trapezoidal-ridge waveguides,double V-ridge waveguides and double elliptical-ridge waveguides.Simulation results show that the transmission characteristics of the four kinds of waveguides with ridges on the narrow side are generally similar,and their cutoff wavelength of the dominant mode and single-mode bandwidth are much smaller than those with ridges on the wide side,moreover,the change trend of transmission characteristics is more intense when ridges are on the wide side.These numerical results are considered to be helpful in the design of microwave components and subsystems.

关 键 词：脊位于窄边 介质加载 主模截止波长 单模带宽 矢量有限元法 

分 类 号：TN814[电子电信—信息与通信工程]