摘要
脊波导的特性阻抗是脊波导的重要参数之一。文章采用有限元法研究了双脊波导电压电流比定义的特称阻抗,计算了窄边与宽边比为0.5,脊的尺寸变化时的特性阻抗数据。分析可知,脊间距离越小时,其特性阻抗值越小,脊间距离s/d增大为0.9时,特性阻抗接近同比例的矩形波导。这些数据将为波导在工程中的设计应用提供理论基础和参考数据。
Characteristic Impedance is an essential feature of any waveguide.The finite element method is adopted to research the voltage-current definition of impendance in double ridge waveguide.It caculates the characteristic impedance when the ratio of short side to Iongside is 0.5 and the ridge＇s dimensions vary. It is shown that the double ridge waveguide would gain a lower impedance when the distance of ridge decrease.When the distance of ridge （s/d） increase to 0.9, characteristic impedance is close to the rectangular waveguide.The numerical results will prodive theoretic basis and referrence for the design and application of waveguide.
出处
《电子质量》
2009年第9期4-5,17,共3页
Electronics Quality
关键词
脊波导
特性阻抗
有限元法
亥姆霍兹方程
ridge waveguide
characteristic impedance
FEM（fieite element method）
Helmholtz equation
