DocumentCode :
2773089
Title :
Evaluation of frequency and mechanical stirring efficiency in a reverberation chamber
Author :
Lemoine, Christophe ; Besnier, Philippe ; Drissi, M´hamed
Author_Institution :
INSA of Rennes, Inst. of Electron. & Telecommun. of Rennes, Rennes
fYear :
2008
fDate :
8-12 Sept. 2008
Firstpage :
1
Lastpage :
6
Abstract :
Measurements in reverberation chambers are usually performed by changing the electromagnetic environment using either mechanical or frequency stirring. Independent stirrer positions or independent frequencies provide uncorrelated fields in the cavity and thereby uncorrelated power levels. The independence of samples is necessary to make a statistical analysis of the data and provides a better accuracy of the measured parameters. The normative method has been proved to be inefficient to evaluate the number of uncorrelated samples because it uses a unique criterion which does not depend on the size of samples. This paper presents experimental results using a new method based on autoregressive models for estimating frequency and mechanical stirring efficiency. Also, we provide an experimental verification of the central limit theorem for both stirring processes, highlighting that uncorrelation does not necessarily implies independence.
Keywords :
autoregressive processes; frequency estimation; reverberation chambers; autoregressive models; electromagnetic environment; frequency estimation; frequency evaluation; independent stirrer positions; mechanical stirring efficiency; normative method; reverberation chamber; uncorrelated power level; Antenna measurements; Boundary conditions; Calibration; Electromagnetic compatibility; Electromagnetic fields; Electromagnetic measurements; Frequency estimation; Immunity testing; Performance evaluation; Reverberation chamber; correlation; effective sample size; frequency stirring; independence; mechanical stirring; reverberation chamber;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electromagnetic Compatibility - EMC Europe, 2008 International Symposium on
Conference_Location :
Hamburg
Print_ISBN :
978-1-4244-2737-6
Electronic_ISBN :
978-1-4244-2737-6
Type :
conf
DOI :
10.1109/EMCEUROPE.2008.4786809
Filename :
4786809
Link To Document :
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