Comparing and visualising statistical shielding effectiveness for rectangular enclosures with different inner structures

Histograms of the electromagnetic field amplitudes inside rectangular enclosures with different inner structures are studied. We consider the variations of the histograms as the inner structure of the enclosure becomes more complex. Furthermore, we study differences of the field component histograms and introduce a shielding effectiveness histogram. We concentrate on enclosures, which are not overmoded on studied frequencies. Obtained results show the usability of histograms in examination of statistical shielding effectiveness and point out that it is not very sensitive against small changes of the inner structure of the enclosure.