Multiconductor microstrip line modelling using FDTD method

Abstract

Multiconductor microstrip lines (MML) are broadly used in various microwave devices. Signal propagation speed along each conductor of the infinite MML is the same and characteristic impedances of each conductor are the same also. However real MML are manufactured according to specified finite number of conductors, therefore these lines aren’t periodical in nature and their electrical characteristics in general case are different. Model of the MML based on finite difference time domain (FDTD) method is presented in this article, time and frequency domain characteristics of MML are considered here also.