** Next:** 6.1.1 Problem Formulation
**Up:** 6. Differential Method
** Previous:** 6. Differential Method

#

6.1 Fundamentals

This section is held on an introductory level. Firstly, the mathematical
formulation of the problem is derived. Here we start with the most basic,
generally valid form of the Maxwell equations. Restriction to an isotropic,
inhomogeneous, time-invariant, linear medium as well as to time-harmonic EM
fields yields the *partial differential equation (PDE)* set we have to
solve. Secondly, a brief overview of the strategy behind the differential method
is given, which shall act as a guideline for the following thorough derivations.

*Heinrich Kirchauer, Institute for Microelectronics, TU Vienna *

1998-04-17