The General Numerical Method of Analysis of Waveguides of Arbitrary Cross Section With Perfect Conducting Wall by FDTD and Its Applications

Abstract

Abstract|A general Method of numerical analysis of the propagation characteristic of waveguide with arbitrary cross section by FDTD is presented which is based on the mode-orthogonality and the hybrid source exciting scheme. It gives the cuto¬ frequency of any existing mode, the curves of its propagation constants and the eld space distribution of the mode in cross section of the waveguide. The Method is validated against a rectangular waveguide with a known electric space distributions of main mode and rst high order mode in the cross-section of the waveguide. Two new waveguides are studied followed the method. One is a pentagon waveguide and other is a waveguide with double ridges. Curves of propagation constants and the eld distribution of Ey on the cross-section of both waveguides are presented 1 Introduction

The Numerical Analyses of the Planar Rectangular Waveguide Having Alterable Single Mode's Working Band Width

“…To obtain other field-component's transverse numerical distributions, one can follow the scheme in [13], where a band pass exciting source and numerical mode orthogonality are used.…”