摘要
本文提出一种求解任意截面波导截止波长的新方法,基本思想是将外接正规波导位函数作为辅助位,然后利用Green第二恒等式得关于所求波导位的齐次积分方程,离散化后得广义本征值方程,本征根即截止波数。用该方法对方一圆过渡波导的计算结果表明,1项近似就可得与直线法相近的结果。
A new method is presented for calculating the cutoff wavelegth of a waveguide with arbitrary shaped cross-section. The potential functions of a regular waveguide such as rectangular waveguide act as the associate potential functions, thus a integral equation(f. E.) with respect to the potential of the original waveguide is deduced in terms of Green's 2nd identity. A system of linear algebric equations can be obtained by the discretion of the I. E. and the cutoff wavelengths are then calculated. Numerical results for a rectangular-to-circular waveguide are in good agreement with those by the method of lines.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1989年第3期94-96,共3页
Acta Electronica Sinica
