【摘要】 为了分析任意截面介质填充波导问题,建立了一种直线法分析模型,并得到了这种波导的特征方程.以介质条填充的矩形波导为例对该模型进行了验证,结果与相关文献一致.对介质条填充矩形波导的主模和次低模的色散特性和截止特性进行了数值计算,得到了一些有意义的结果.该方法对处理电磁场边值问题有一定借鉴意义.更多还原

【Abstract】 An analysis model based on straight line method was presented in order to analyze waveguides filled with arbitrarily shaped dielectric,and the characteristic equations are obtained for these waveguides.A rectangular guide filled with dielectric slab was selected as an example to testify whether the model is credible or not.The analysis showed that the result was agreeable to that in relevant references.Some useful results were obtained from the numerical calculation for this guide to analyze its dispersion characteristic and cut-off characteristic of the dominant mode and second-order mode.This analysis model has some reference value for dealing with the boundary-value problems of electromagnetic field.更多还原