2013
DOI: 10.1109/temc.2012.2213257
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Probability Distribution of the Quality Factor of a Mode-Stirred Reverberation Chamber

Abstract: Abstract-We derive a probability distribution, confidence intervals and statistics of the quality (Q) factor of an arbitrarily shaped mode-stirred reverberation chamber, based on ensemble distributions of the idealized random cavity field with assumed perfect stir efficiency. It is shown that Q exhibits a FisherSnedecor F-distribution whose degrees of freedom are governed by the number of simultaneously excited cavity modes per stir state. The most probable value of Q is between a fraction 2/9 and 1 of its mea… Show more

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Cited by 37 publications
(48 citation statements)
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“…In the isotropic field of an RC, many strong resonances occur and there are many modes with similarly high Q-factors, although even in a perfect chamber the distribution of the individual Q-factors is not uniform [21]. Most significant modes are affected by the present loss mechanism, which is generally distributed uniformly on the chamber walls.…”
Section: Quality Factormentioning
confidence: 99%
See 1 more Smart Citation
“…In the isotropic field of an RC, many strong resonances occur and there are many modes with similarly high Q-factors, although even in a perfect chamber the distribution of the individual Q-factors is not uniform [21]. Most significant modes are affected by the present loss mechanism, which is generally distributed uniformly on the chamber walls.…”
Section: Quality Factormentioning
confidence: 99%
“…Due to the multipath nature of this environment, there is no need to place the transmission lines in more than a single spatial configuration. The |S 21 | parameters have been recorded over the frequency range between 200 MHz and 3 GHz. The vector network analyzer had been calibrated between the transmitting antenna and the output port of the transmission line, therefore the results had to be compensated for the transmitting discone antenna mismatch.…”
Section: Random Fieldmentioning
confidence: 99%
“…In particular, the following samples have been considered: a common brick made with ancient roman techniques (Roman Brick), which has been subjected to sandblasting (then called S); a Roman Brick not subjected to sandblasting Table 1 reports the density of the materials under test. Material density, as sample geometry, is believed to have a significant impact on the average quality factor (Q) [20,21], and therefore on the average ACS. Also the chemical composition of the materials is relevant in the absorption of electromagnetic waves, hence an appropriate analysis of the chemical characteristics of the materials under test has been performed.…”
Section: Materials Under Testmentioning
confidence: 99%
“…Also, risk and reliability assessment metrics (e.g., mean time to failure, first-passage time) [18] require knowledge of the PDF. By extension, PDFs of the field allow for calculating PDFs of field-related instrumentation and EME parameters, e.g., antenna impedance [19] and cavity Q [20].…”
Section: Probability Distributions Of Field and Energymentioning
confidence: 99%