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.