摘要
本文选取本征函数作为权函数,由格林第二恒等式建立边界积分方程,并采用边界基形式得到线性齐次方程组。这种方法不仅降低了系数矩阵的维数,而且使其各项仍保持为简单一项,减少了计算量.本文提供了几种常见金属波导的例子,计算结果既收敛快、又足够准确。
Based on the second kind of Green's identity, a boundary integral equation for arbitrary cross-section waveguide is transformed to a system of linear homogeneous algebraic tquations by means of expansion of boundary bases and using the eigenfuncuons of a fictitious regular boundary as weighting functions, which corresponds to less algebraic equations than BEM and simpler coefficients than the modified BEM. The numerical results for some typical metallic waverguides are given by using the method of eigen-weighted bounlary integral equation, and they are exact enough with fast convergence.
基金
国家自然科学基金
关键词
波导传输
边界积分法
金属波导
Boundary integral method
Mi.'tallic waveguide
Eigenvalue problem
Cutoff wavenumber
