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Various estimations of composite Q-factor with antennas in a reverberation chamber

Abstract : This paper deals with the estimation of the composite Q-factor in a reverberation chamber using one or two antennas (possibly a set of them). Most of Q-factor estimations provided in literature are based on the estimation of the ensemble average of the electric power captured at the terminal of a receiving antenna, the EM field being produced with another one. We first highlight that using two antennas and a vector network analyzer, three different estimations are possible and they are found experimentally to be almost equivalent. Second, removing one antenna the Q-factor may change mainly in the frequency range for which the Q-coefficient of an antenna is no more negligible. Furthermore a post-processing of these two types of measurements allows to extract an estimation of this Q-coefficient alone. This estimation is quite favorably compared to its theoretical estimation based on ideal random field hypothesis.
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https://hal.archives-ouvertes.fr/hal-01250739
Contributor : Philippe Besnier <>
Submitted on : Tuesday, January 5, 2016 - 11:33:14 AM
Last modification on : Wednesday, October 14, 2020 - 3:53:50 AM

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Philippe Besnier, Christophe Lemoine, Jérôme Sol. Various estimations of composite Q-factor with antennas in a reverberation chamber . Electromagnetic Compatibility (EMC), 2015 IEEE International Symposium on, Aug 2015, Dresden, Germany. ⟨10.1109/ISEMC.2015.7256344⟩. ⟨hal-01250739⟩

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