Total scattering cross section improvements from electromagnetic reverberation chambers modeling and stochastic formalism

This article is dedicated to deterministic and stochastic improvements for TSCS computations. Firstly, the Total Scattering Cross Section (TSCS) measurements are achieved in a numerical Reverberation Chamber (RC) for different targets. From a theoretical point of view, a free-space environment (for instance an anechoic chamber modeled numerically by absorbing boundary conditions) jointly with plane waves stimulations are needed to compute the TSCS. The developed method allows predicting the TSCS from few simulations in RC. Secondly, in this paper, a stochastic collocation technique is used to accurately and efficiently compute the TSCS statistical moments varying randomly given parameters. Thus, the presented foundations and numerical results demonstrate the ability of the method to integrate stochastic variations in TSCS computing. The agreement from stochastic (uncertainties around targets sizes) results is obtained considering the convergence of the collocation technique.