【摘要】 本文提出用多极理论准解析法计算不满足多极理论展开条件的脊波导本征值问题 ,介绍计算二维 Helmholtz方程边值问题的多极理论准解析法计算规则。实例计算结果表明 :多极理论准解析法具有较高的计算精度 ,是计算复杂截面波导本征值问题的一种有效方法 ,可以很方便地应用于复杂截面波导工程问题的设计与计算更多还原

【Abstract】 A novel quasi analytical method, the multipole theory (MT) method, is described for calculating 2D Helmholtz equation boundary value problems with the complicated field domain. The quasi analytical computational laws of the MT method are also introduced. By calculating the cutoff wavenumbers of a ridged waveguide family,it shows that the MT method is an effective approach for computation of the cutoff wavenumbers in waveguides of the complicated cross section, it is reliable and may be used to calculate engineering waveguide problems.更多还原