脊的变化对对称双脊波导主模截止波长的影响

Dependence of Ridge Position on the Cutoff Wavelength of the Dominant Mode in Symmetrical Double-Ridge Waveguides

关于双脊波导的研究报道很多,但对双脊波导的研究都集中于脊中心对称情况,对于脊偏离中心位置的情况则没有涉及。采用对亥姆霍兹方程有限元方法分析了脊的变化对双脊波导主模截止波长的影响,数值结果与文献结果对比,计算方法精确有效,从而可以通过改变脊尺寸和位置调节截止波长。

There are numbers of disquisition for double-ridge waveguide,but they have not discussed and reported the ridge off center double-ridge waveguide.The influence of the ridge position on the cutoff wavelength of the dominant mode in a double-ridge waveguide is analyzed by the finite-element method.Transfer cutoff wavelength is given in different ridge position,Numerical results demonstrated that the method is correct and efficient.So the cutoff wavelength can be adjusted by changing the ridge dimensions as well as by adjusting its position