Field Measurements within a Large Resonant Cavity Based on the Perturbation Theory

Abstract : ue to the sensitivity of the Øeld distribution within a resonant cavity to the presence of an object, conventional measurement techniques employing a probe suÆer from a limited accuracy. Therefore we propose a new measurement technique of the electric Øeld distribution that avoids the use of a probe. Based on the perturbation theory, it consists of a measure of the cavity resonant frequency variation while displacing a small perturbing object within the cavity. The choice of the perturbing object shape, dimension and material is discussed with the help of simulation and measurement results in a canonical case. The case of reverberation chamber equipped with a mode stirrer is also considered, as well as the insertion of a metallic box within the cavity. Our measurement setup is very low-cost, simple to set up and to use, and adapted to any cavity geometry.
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Submitted on : Tuesday, January 17, 2017 - 5:00:03 PM
Last modification on : Thursday, February 7, 2019 - 2:25:16 PM

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Mohamed M'Madi Nasserdine, Stéphanie Mengué, Christophe Bourcier, Elodie Richalot. Field Measurements within a Large Resonant Cavity Based on the Perturbation Theory. Progress In Electromagnetics Research B, EMW Publishing, 2013, 57, pp.1-20. ⟨http://www.jpier.org/PIERB/pier.php?paper=13100101⟩. ⟨10.2528/PIERB13100101⟩. ⟨hal-01438436⟩

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