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Investigation of Reverberation Chamber Measurements Through High-Power Goodness-of-Fit Tests

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3 Author(s)
Lemoine, C. ; INSA of Rennes, Rennes ; Besnier, P. ; Drissi, M.

This paper aims to improve the analysis of distribution functions of a rectangular component of the electric field (ER) and the power received in an overmoded reverberation chamber. All data and analysis were achieved in the Institute of Electronics and Telecommunications of Rennes (IETR) mode-stirred chamber. For the power received on a large antenna, tests are consistent with the exponential probability density function assumption. However, high-power goodness-of-fit tests modify the determination of the lowest frequency from which the ideal underlying theoretical distributions can be associated with measurements. For the electric field in an overmoded regime, a Weibull distribution is proposed to model ER measurements, instead of the Rayleigh distribution hypothesis, which is rejected by statistical tests. Furthermore, Weibull distribution provides better agreement with standard deviation of samples. An additional experiment with a monopole-like antenna illustrates that the exponential distribution is rejected when the monopole is small with respect to the wavelength, but is accepted when the antenna length is roughly over lambda/4. Experimental results are provided by a large number of goodness-of-fit tests. The paper highlights that the use of adapted critical values is necessary for testing a distribution function whose parameters are estimated.

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Electromagnetic Compatibility, IEEE Transactions on  (Volume:49 ,  Issue: 4 )