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本文用有限元法从求解非均匀介质填充波导本征值问题入手,计算了鱼鳍线的色散特性.由于计及了鱼鳍厚度对色散特性的影响,故可以修正用其他方法计算的结果.文中用统一的计算程序对鱼鳍线、双脊波导和条形介质加载矩形波导主模和高次模色散特性进行计算,获得了与用别的方法得到的相同的结果.实测的色散特性曲线与考虑了鳍厚的计算值相吻合,证实了所述方法的正确性.
In this paper, the finite element method is used to solve the eigenvalue problem of inhomogeneously filled waveguides, and the dispersion characteristics of the fins are calculated. The results calculated by other methods can be corrected by considering the influence of the fin thickness on the dispersion characteristics. In this paper, a uniform calculation program was used to calculate the main mode and the high-order mode dispersion characteristics of the rectangular waveguide loaded with fins, double-ridge waveguide and strip media. The same results obtained by other methods were obtained. The measured dispersion curve In agreement with the calculated thickness of the fin, the correctness of the method is confirmed.