GROS , Jean-Baptiste

Mode-stirred reverberation chambers (RC) are used in the industry to test the immunity or the susceptibility of on-board electronic systems (plane, automobile, smartphone) towards the electromagnetic waves present in their environment. Mode-stirred RCs have to comply with a number of statistical criteria fixed by international standards. The...

Electromagnetic reverberation chambers (RC) are nowadays commonly used for electromagnetic immunity testing applications. Thanks to the presence of a mechanical stirrer (generally a rotating metallic object), electronic devices under test are submitted to an isotropic, statistically uniform and depolarised electromagnetic field. The latter...

Electromagnetic reverberation chambers (RC) are nowadays commonly used for electromagnetic immunity testing applications. Thanks to the presence of a mechanical stirrer (generally a rotating metallic object), electronic devices under test are submitted to an isotropic, statistically uniform and depolarised electromagnetic field. The latter...

The effective Hamiltonian formalism is extended to vectorial electromagnetic waves in order to describe statistical properties of the field in reverberation chambers. The latter are commonly used in electromagnetic compatibility tests. As a first step, the distribution of wave intensities in chaotic systems with varying opening in the weak...

In this article, we present a numerical investigation of three-dimensional electromagnetic Sinai-like cavities. We computed around 600 eigenmodes for two different geometries: a parallelepipedic cavity with one half- sphere on one wall and a parallelepipedic cavity with one half-sphere and two spherical caps on three adjacent walls. We show...

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In this article, we present a numerical investigation of three-dimensional electromagnetic Sinai-like cavities. We computed around 600 eigenmodes for two different geometries: a parallelepipedic cavity with one half- sphere on one wall and a parallelepipedic cavity with one half-sphere and two spherical caps on three adjacent walls. We show...

This article presents a study of the intensity statistics of the electromagnetic response in a chaotic reverberation chamber (RC) in the presence of losses. Through an experimental investigation, intensity statistics of the response in a conventional mode-stirred RC are compared with those in a chaotic RC in the neighborhood of the Lowest...

Ce papier présente les résultats d'études concernant les statistiques de la réponse électromagnétique des chambres réverbérantes (CR) chaotiques en présence de pertes. Ces résultats découlent du caractère universel des statistiques spectrales et spatiales des modes de la cavité qu'on peut décrire à partir de la théorie des matrices aléatoires...

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Using the knowledge gained from the wave chaos theory, we present simple shapes of resonant cavities obtained by inserting metallic hemispheres or caps on the walls of a parallelepiped-shaped cavity. The presented simulation results show a significant improvement of the field statistical properties when the number of hemispheres or caps...

The change of resonance widths in an open system under a perturbation of its interior was recently introduced by Fyodorov and Savin [PRL 108, 184101 (2012)] as a sensitive indicator of the nonorthogonality of resonance states. We experimentally study universal statistics of this quantity in weakly open two-dimensional microwave cavities and...

Cet article présente une étude de la réponse électromagnétique d'une chambre réverbérante (CR) chaotique en présence de pertes. Au moyen de simulations et d'expériences, sont comparées les fluctuations des maxima du champ obtenus dans une CR à brassage de modes conventionnelle et dans une CR chaotique au voisinage de la fréquence minimum...

This paper aims to revisit the tolerance requirements for the calibration of chaotic reverberation chambers (RC). In recent years, some of the authors have established how chaotic reverberation chambers can ideally meet the requirement of statistically isotropic, uniform and depolarized response fields due to so-called ergodic modes which are...

Using the knowledge gained from the wave chaos theory, we present simple shapes of resonant cavities obtained by inserting metallic hemispheres or caps on the walls of a parallelepiped-shaped cavity. The presented simulation results show a significant improvement of the field statistical properties when the number of hemispheres or caps...

This article presents a study of the electromagnetic re- sponse of a chaotic reverberation chamber (RC) in the pres- ence of losses. By means of simulations and of experi- ments, the fluctuations in the maxima of the field obtained in a conventional mode-stirred RC are compared with those in a chaotic RC in the neighborhood of the Lowest...

Here we investigate how to characterize chaotic reverberation chambers on a spectral basis by experimentally investigating the distribution of resonance widths and comparing it with a theoretical prediction in the weak coupling limit of open chaotic cavities. Those predictions are deduced from the Random Matrix Theory and depend on two...

Any measurement opens a wave system. This coupling to the continuum drastically changes the system properties by converting discrete modes into decaying resonance states and induces currents that did not exist in the closed system. One possible description is the effective Hamiltonian formalism. As a consequence, typical quantities investigated...

Any measurement opens a wave system. This coupling to the continuum drastically changes the system properties by converting discrete modes into decaying resonance states and induces currents that did not exist in the closed system. One possible description is the effective Hamiltonian formalism. As a consequence, typical quantities investigated...

An alternative approach to the International Standard criteria used to assess the well-operating of a reverberation chamber (RC) is proposed. The considered indicators, inspired from studies on chaotic cavities, rely on the properties of the cavity resonant frequencies. The new proposed approach aims to reduce the measurement duration and...

The use of stochastic approaches for the electromagnetic characterization of complex systems is illustrated in two cases that are reverberation chambers and urban environment. Several stochastic approaches are adopted in both cases, from a perturbative approach to the determination of distributions; the indications they provide as well as the...