A STUDY OF CHARACTERISTICS OF WAVEGUIDE WITH ARBITRARY CROSS-SECTION VIA NON-ORTHOGONAL FINITE-DIFFERENCE FREQUENCY-DOMAIN METHOD
任意截面波导特性的非正交频域有限差分研究

A finite-difference frequency-domain(FD-FD) method in non-orthogonal coordinate is presented for the eigenvalue problems of waveguide. The numerical discrete mesh of the algorithm can fit the arbitrary boundary well. In this paper the cut-off frequencies of modes of waveguides are calculated via given eigenvalue equation. The results show good agreement with those from other sources.