Presentation of the numerical model

The numerical model of reverberation chamber that we propose here is based on image theory. This model allows a description of the E-field in both the time domain and the frequency domain.

The parameters of the model are the following:

• the dimensions of the cavity

• the losses in the cavity

• the position of the emitter

The model consists of two programs, the first program ImageCreator.m computes the positions and the orientation of the images. The second program ExampleTD.m computes the electric field at a given position in the cavity. The stirring process can be simulated by using source stirring. Basically it means that the statistic of the E-field is retrieved by choosing randomly N positions of the receivers in the test volume of the chamber instead of choosing N stirrer positions.
We propose an harmonic version of this model ExampleFD.m. Please note that this harmonic version is very slow. The only advantage of the harmonic version over the time domain version is the ability to simulate frequency dependent losses.

The model is very simple to understand, but one should read the Model Companion in order to use it properly. Losses estimation and convergence issues are certainly the most important elements to consider before using the model.

So far, the model is written in Matlab, a Python version is being developed.

We plan to add various sample programs using this model in order to show its capacities.