Statistical model for a mode-stirred chamber

Kostas, J.; Boverie, B.

doi:10.1109/15.99120

Cited by 311 publications

(223 citation statements)

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“…Since the (overmoded) RC represents a rich scattering environment, it is usually assumed that the Cartesian field is complex Gaussian, i.e., the real and imaginary parts of the Cartesian field components are Gaussian distributed. Namely the amplitude of the Cartesian field in a RC is Rayleigh distributed [1]. On the other hand, there are studies showing that the Cartesian field in an undermoded RC follows the Weibull or Bessel K distribution [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…The Rayleigh distribution is probably the most common statistical model for an overmoded RC [1]. Its PDF can be expressed as (for notational convenience, the subscript j|θ is dropped hereafter)…”

Section: Candidate Distribution Setmentioning

confidence: 99%

“…It is well known that the Cartesian field in a well stirred (overmoded) RC follows complex Gaussian distribution [1]. Any distribution deviation represents a RC imperfection (i.e., an undermoded RC [3]).…”

Section: Introductionmentioning

confidence: 99%

“…The reverberation chamber (RC) has been used for electromagnetic compatibility (EMC) tests as well as over-the-air (OTA) measurements of wireless devices [1][2][3][4][5][6][7][8][9][10][11][12][13]. Due to the complicated and time-varying test conditions, various RC measurements are ubiquitously analyzed from the statistical point of view.…”

Section: Introductionmentioning

confidence: 99%

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Model Selection for Investigation of the Field Distribution in a Reverberation Chamber

Chen¹

2013

PIER M

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Abstract-In this work two model selection criteria, i.e., Akaike's information criterion (AIC) and minimum description length (MDL), are applied to measurements in a RC with Rayleigh, Rician, Nakagami, Bessel K, and Weibull distributions as the distribution candidate set. In spite of small differences of the AIC and MDL tests (due to their different penalty terms on distribution parameters), both criteria result in similar conclusions. Results show that the Rayleigh distribution provides the overall good fit to the Cartesian field amplitude, especially for an overmoded RC, and that the Weibull distribution provides good fit to the Cartesian field amplitude in an undermoded or loaded RC. In addition, it is found that both the Rician and Weibull distributions provide improved approximations of the Cartesian field amplitude in a loaded RC with non-negligible unstirred components and that the transition from undermoded RC to overmoded RC depends not only on the operating frequency and mode-stirrer efficiency (as it is commonly believed) but also on source stirring and RC loading.

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Section: Introductionmentioning

confidence: 99%

Section: Candidate Distribution Setmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Model Selection for Investigation of the Field Distribution in a Reverberation Chamber

Chen¹

2013

PIER M

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“…Statistical models are typically proposed to reproduce the behavior of the electromagnetic fields thus generated, e.g., by representing the fields as continuous stochastic processes [2], [3], [4], [5] or by representing the propagation through a superposition of contributions modulated by random coefficients [6], [7], [8], [9]. The rationale for approximating the fields as random variables is not only based on the complexity of the wave propagation, but also on the existence of further randomizing processes, such as the presence of moving scatterers or even in the case of a static medium where the sources are randomly positioned, e.g., in the case of channel fading [10].…”

Section: Introductionmentioning

confidence: 99%

Source Correlation in Randomly Excited Complex Media

Cozza

2012

Antennas Wirel. Propag. Lett.

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Abstract-When dealing with modal representations of the Green's function of a complex medium, the modal coefficients are often assimilated to random variables, where statistical independence is justified on heuristic arguments supported by the complexity of the propagation in multiple-scattering scenarios. This letter addresses this assumption when the randomness originates from an uncertain positioning of the sources, proving under what conditions the modal coefficients can be regarded as uncorrelated, showing that this special condition should not be taken for granted, even in complex media.

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Antenna Reverberation Chamber

Kouveliotis

Trakadas

Heretakis

et al. 2005

Encyclopedia of RF and Microwave Engineering

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The use of the reverberation chamber for performing electromagnetic compatibility (EMC) tests and antenna measurements is examined in this article. This kind of chamber exhibits a significant number of advantages compared to the other commonly used test sites. Its low cost, compact, and easily built structure simultaneously appears to host a very “convenient” electromagnetic environment inside the enclosure, with regard to the requirements that are posted by the standard that is followed during the EMC or any other type of test such as antenna measurements. More specifically, antenna radiation efficiency measurements prove to be satisfactorily performed through the use of a reverberating enclosure, as well as other antenna parameters (e.g., input impedance) tests. The basic characteristics of such a structure are presented with regard to the recently introduced IEC 61000‐4‐21 specification and studies available in the literature. The field uniformity requirements are being extensively described, as well as ways of improving the achieved uniformity. The field inside a reverberating enclosure is statistically characterized with the use of the models proposed in the literature, which are experimentally verified. The use of the reverberation chamber at relatively low frequencies is presented, together with its ability to store large amounts of energy. Finally, the different ways of operating a reverberation chamber are described with regard to which of its features is (are) needed for each instance. The whole presentation marks out the usefulness of the reverberation chamber for performing electromagnetic compatibility tests as well as antenna measurements.

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Statistical model for a mode-stirred chamber

Cited by 311 publications

References 1 publication

Model Selection for Investigation of the Field Distribution in a Reverberation Chamber

Model Selection for Investigation of the Field Distribution in a Reverberation Chamber

Source Correlation in Randomly Excited Complex Media

Antenna Reverberation Chamber

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