为了满足微波传输系统性能的某些需求,各种结构形状的新型波导应运而生。采用有限差分法,利用MATLAB计算了脊槽波导中脊和槽的几何尺寸在中间位置连续变化时的主模截止波长,并对计算结果进行了对比分析,得出了主模截止波长随着脊的高度、宽度、槽的宽度等变化而变化的一些相关结论,为设计脊波导器件提供了参数。 In order to meet certain requirements of the performance of the microwave transmission system, a variety of structural shapes of the new wave guide came into being. The finite-difference method is used to calculate the cut-off wavelength of the main mode when the geometrical dimensions of the ridge and groove are continuously changed in the middle of the groove-groove waveguide by using MATLAB. The calculated results are compared and analyzed. The height, the width, the groove width and so on the change some related conclusions, has provided the parameter for designing the ridge waveguide device.