FINITE-DIFFERENCE ANALYSIS OF CYLINDRICAL 2-CONDUCTOR MICROSTRIP TRANSMISSION-LINE WITH TRUNCATED DIELECTRICS

The characteristics of the quasi-static TEM mode of a cylindrical micr ostrip transmission line are investigated using the finite difference technique. The transmission line consists of two perfectly conducting strips located between two different layers of dielectric materials, a nd a dielectric notch embedded in the substrate between two strips. Th e dielectric overlay and substrate are truncated for practical purpose s. The formulation of the problem is based on the solution of Laplace' s equation subject to appropriate boundary conditions and the use of T aylor's expansion to approximate the first and second order derivative s in Laplace's equation. To truncate the finite difference mesh, two a rtificial boundaries have been considered. The goal of this research i s to study the effects of the parameters of the multi-layered cylindri cal transmission line on the odd and even mode phase velocities, and t o present several techniques to minimize the coupling and distortion b etween the two conductors. Copyright (C) 1996 Published by Elsevier Sc ience Ltd