TLM Extension to Electromagnetic Field Analysis of Anisotropic and Dispersive Media: A Unified Field Equation

The transmission-line matrix (TLM) method, in time domain, is extended to account for the presence of anisotropic and dispersive media in electromagnetic structures or devices. The model is thoroughly constructed by using Maxwell's equations that make it a unified general TLM formulation. Numerical results are compared with experimental measurements; hence, in the case of ferrite-based structures, validating the model and showing the accuracy of the approach.

I. Introduction

Over the last few years, the rapid development of communication applications has generated a growing interest for miniaturization and cost reduction of microwave devices. The increase of operating frequencies and tunability are additional constraints that require more complex and accurate models for computer-aided design (CAD) of communication system components.