Time Domain Mode Basis Method for a Waveguide with Transverse Inhomogeneous Multi-Сonnected Cross-Section. 2. Example of Numerical Implementation of the Method

Abstract

As an example, the impulse signal propagation in a parallel-plate waveguide with a longitudinal dielectric layer is considered. Such a waveguide is the simplest transverse inhomogeneous TEM-line. The results obtained with the mode basis method proposed coincide with the solution by the finite-difference time-domain method. Shown is fast convergence with the mode expansion truncation. The method considered can also be very effective in the analysis of transverse inhomogeneous waveguide dispersion curves in the frequency domain. It allows high computational efficiency in obtaining dispersion characteristics within a wide frequency range and also classification of guided-wave modes in the frequency range by their comparison with the introduced frequency-independent modes in the time domain.