Modeling of Anechoic Chambers with Equivalent Materials and Equivalent Sources

Numerical simulation of anechoic chambers is an important topic nowadays, since it can provide useful data about the performance of an electromagnetic compatibility site. However, the mathematical nature of the problem, the physical dimensions of the simulated sites, and the frequency ranges pose nontrivial challenges to the numerical simulation. Computational requirements, in particular, will quickly become unmanageable if adequate techniques are not employed. In this paper, we describe a novel approach, based on equivalent elements, that enables the simulation of large chambers with modest computational resources. The method is then validated against 558 real measurement results.