In this article, angular plane wave expansion of the standing electric field within a reverberation chamber is studied. For this purpose, a high-resolution Root multiple signal classification based method was adapted to the context of the reverberation chamber by using a decorrelation procedure to estimate the angles of arrival and complex amplitudes of the planes waves. Using finite difference time domain simulations to get the standing electric field cartographies, it is demonstrated, at low frequencies, that directions of arrival are slightly affected by the stirrer rotation, whereas the wave amplitudes are strongly perturbed. This result indicates that the stirrer works as a plane wave powers tuner.
This work aims to present the impact of disturbing the stationary modes in a rectangular-shaped reverberation chamber by small-dimensioned stirrers. The study focuses on plane wave's modeling of the electric field inside a flat cavity using information theory criteria. The emphasis is on anisotropy of the number of plane-waves distribution in the cavity and a strong increase near stirrers. The distributions of the plane wave spectra are studied for a set of reverberation chamber configurations at frequencies close to and far superior to the lowest usable frequency.
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