Use of Correlation Matrix to Assess the Stirring Performance of a Reverberation Chamber: a Comparative Study

TL;DR

This paper compares recent correlation matrix techniques to assess the stirring performance of reverberation chambers, utilizing full wave simulations to analyze inhomogeneities and anisotropies affecting uncorrelated positions.

Contribution

It introduces a comparative analysis of multivariate correlation methods for evaluating reverberation chamber performance using advanced simulation data.

Findings

Correlation matrix techniques effectively identify uncorrelated stirrer positions.

Full wave simulations capture complex inhomogeneous and anisotropic effects.

Revised threshold crossing concept improves chamber performance assessment.

Abstract

The use of correlation matrices to evaluate the number of uncorrelated stirrer positions of reverberation chamber has widespread applications in electromagnetic compatibility. We present a comparative study of recent techniques based on multivariate correlation functions aimed at relating space-frequency inhomogeneities/anisotropies to the reduction of uncorrelated positions. Full wave finite-difference time domain simulations of an actual reverberation chamber are performed through an in-house parallel code. The efficiency of this code enables for capturing extensive inhomogeneous/anisotropic spatial volumes (frequency ranges). The concept of threshold crossing is revised under the light of random field sampling, which is important to the performance of arbitrary reverberation chambers.