Waveguide solutions by the finite-element method
作者:
S.Ahmed,
P.Daly,
期刊:
Radio and Electronic Engineer
(IET Available online 1969)
卷期:
Volume 38,
issue 4
页码: 217-223
年代: 1969
DOI:10.1049/ree.1969.0103
出版商: IERE
数据来源: IET
摘要:
A finite-element method based on a function minimization techinique is developed for analyzing homogeneous waveguide problems. The continuous eigen-value operator as in the Ritz finite-difference method is replaced by a matrix operator. The resulting equations are, however, matrix eigen-value equations. Relevant properties of the matrices are discussed. It is demonstrated that the method has advantages in dealing with awkward boundaries and singularities. A feature of the method is that the error in the eigen-value is a monotonically decreasing function of successive sub-divisions of the cross-section. Minimization of a variational expression assures rapid convergence to the correct eigen-value. Three waveguides are analysed in some detail.
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