Absorber loading study in FOI 36.7 m&lt;sup&gt;3&lt;/sup&gt; mode stirred reverberation chamber for pulsed power measurements

Lunden, O.; Bäckström, Mikael

doi:10.1109/isemc.2008.4652090

Cited by 10 publications

(8 citation statements)

References 1 publication

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“…3 for each loading configuration) show the increase of the correlation of the EM field when the amount of loading increases (leading to lower number of uncorrelated samples obtained over one stirrer revolution). These results are in full agreement with the results previously presented in [13]- [15]. However, it is worth noting that for weak loading (until 12 PA for instance), the increase of the correlation is really lowsensitive.…”

Section: Obtained Resultssupporting

confidence: 94%

“…Finally, the influence of the insertion of losses on the number of uncorrelated samples obtained over one stirrer revolution has been studied in recent papers [13]- [15] demonstrating from measurement results that this number is lowered when introducing absorbers in comparison to the case of an empty MSRC.…”

Section: B State-of-the-art About the Loading Effect In A Msrcmentioning

confidence: 97%

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Determination of the “Quasi-Ideal Reverberation Chamber Minimal Frequency” according to loading

Adardour

Andrieu

Reineix

2013

2013 IEEE International Symposium on Electromagnetic Compatibility

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An original method allowing to define from measurements a specific frequency called "Quasi-Ideal Reverberation Chamber Minimal Frequency" (QIRCMF) is presented. The QIRCMF corresponds to the frequency where a mode stirred reverberation chamber is considered as working in a "quasi-ideal regime". After a definition of what means "quasiideal" reverberation chamber, the method is presented. The method is based on 1) the assessment of the electromagnetic field distributions obtained in the working volume (in comparison with the distributions obtained in the ideal model defined in [1]) and 2) the assessment of the correlation of the electromagnetic field over one mode stirrer revolution. Experimental results clearly show that the QIRCMF can be highly reduced by introducing in the mode stirred reverberation chamber but far from the working volume a little amount of loading.

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Section: Obtained Resultssupporting

confidence: 94%

Section: B State-of-the-art About the Loading Effect In A Msrcmentioning

confidence: 97%

Determination of the “Quasi-Ideal Reverberation Chamber Minimal Frequency” according to loading

Adardour

Andrieu

Reineix

2013

2013 IEEE International Symposium on Electromagnetic Compatibility

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“…As opposed to the case of a perturbative effect, it has been highlighted how a strong increase in losses has a negative impact on field statistics, as in [21]. It is noteworthy that in that study the quality factor was reduced by a factor up to ten, thus strongly modifying the reverberation chamber behaviour, whose relationship with the unloaded configuration should be questioned.…”

mentioning

confidence: 87%

The Role of Losses in the Definition of the Overmoded Condition for Reverberation Chambers and Their Statistics

Cozza

2011

IEEE Trans. Electromagn. Compat.

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“…The lowest value of is 12.7 ns, when the cavity is loaded with 12 units of RAM; therefore, , and so it is reasonable to say . The effect of loading not only has an effect on the time constant, it also potentially effects the number of modes, with greater loading leading to fewer modes [25] and, therefore, a greater LUF. It has also, however, been reported that the opposite effect may happen; for example, Arnaut shows that the LUF is proportional to the third root of the -factor (and, hence, time constant) [26].…”

Section: Investigating the E-field Uniformity In Vehicle Cavitiesmentioning

confidence: 99%

On the Analogy Between Vehicle and Vehicle-Like Cavities With Reverberation Chambers

Herbert

Loh

Wassell

et al. 2014

IEEE Trans. Antennas Propagat.

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Deploying wireless systems in vehicles is an area of current interest. Often, it is implicitly assumed that the electromagnetic environment in vehicle cavities is analogous to that in reverberation chambers, it is therefore important to assess to what extent this analogy is valid. Specifically, the cavity time constant, electromagnetic isolation and electric field uniformity are investigated for typical vehicle and vehicle-like cavities. It is found that the time constant is a global property of the cavity (i.e., it is the same for all links). This is important, as it means that the root-mean-square delay spread for any link is also a property of the cavity, and thus so is the coherence bandwidth. These properties could be exploited by wireless systems deployed in vehicles. It is also found that the field distribution is not homogeneous (and is therefore not uniform), but can be isotropic. For situations where the field distribution is isotropic, the spatial coherence is well defined, and therefore multiple-input-multiple-output antenna arrays can be used to improve performance of wireless systems. For situations where the field distribution is not isotropic, the angular spread is not uniform, and therefore beamforming can be used to improve performance of wireless systems.

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Absorber loading study in FOI 36.7 m<sup>3</sup> mode stirred reverberation chamber for pulsed power measurements

Cited by 10 publications

References 1 publication

Determination of the “Quasi-Ideal Reverberation Chamber Minimal Frequency” according to loading

Determination of the “Quasi-Ideal Reverberation Chamber Minimal Frequency” according to loading

The Role of Losses in the Definition of the Overmoded Condition for Reverberation Chambers and Their Statistics

On the Analogy Between Vehicle and Vehicle-Like Cavities With Reverberation Chambers

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Absorber loading study in FOI 36.7 m<sup>3</sup> mode stirred reverberation chamber for pulsed power measurements

Cited by 10 publications

References 1 publication

Determination of the &#x201C;Quasi-Ideal Reverberation Chamber Minimal Frequency&#x201D; according to loading

Determination of the &#x201C;Quasi-Ideal Reverberation Chamber Minimal Frequency&#x201D; according to loading

The Role of Losses in the Definition of the Overmoded Condition for Reverberation Chambers and Their Statistics

On the Analogy Between Vehicle and Vehicle-Like Cavities With Reverberation Chambers

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Determination of the “Quasi-Ideal Reverberation Chamber Minimal Frequency” according to loading

Determination of the “Quasi-Ideal Reverberation Chamber Minimal Frequency” according to loading