Tolerance requirements revisited for the calibration of chaotic reverberation chambers

International audienceThis 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 generic in chaotic cavities. In particular, it was shown that, below or close to the lowest useable frequency (LUF), a generally admitted criterion proposed by the International Standard IEC 61000-4-21 to evaluate the uniformity of the field distribution is valid in chaotic RCs while not in conventional regular RCs. Indeed, the EM field in chaotic RCs display universal statistical features which cannot be obtained in conventional RCs at low frequency. In chaotic RCs, we propose to use the universality of field statistics to evaluate a confidence interval based on the theoretical distribution of the electric field deduced from the sole knowledge of the modal overlap