A General Method for Determining the Independent Stirrer Positions in Reverberation Chambers: Adjusting the Correlation Threshold

Pfennig, Stephan

doi:10.1109/temc.2016.2567541

Cited by 20 publications

(16 citation statements)

References 8 publications

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“…Thus it is important to obtain an accurate estimate of N S and N SF from the measurements. The autocorrelation function (ACF) method with adjusted correlation threshold [20,21] is adopted and N S can be estimated as…”

Section: Measurements and Resultsmentioning

confidence: 99%

“…where η R and η M represent the efficiency of the reference and measurement antennas, Γ R and Γ M represent the reflection coefficient of the reference and measurement antennas, respectively. S 21 [14] in the reference measurement, respectively. ⟨ • ⟩ N represents the ensemble average of N samples.…”

Section: Statisticsmentioning

confidence: 99%

“…In addition to the usual uncertainty contributions when conducting an antenna measurement, the RC's stochastic property can contribute to the uncertainty as well. The measurement uncertainty of the RC has been extensively studied in the literature [13][14][15][16][17][18][19][20][21][22][23][24]. Nevertheless, most of these studies are confined to passive measurements, except for [22][23][24] where the TRPs of active wireless devices were measured.…”

Section: Introductionmentioning

confidence: 99%

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Statistical analysis of measurement uncertainty in total radiated power of wireless devices in reverberation chamber

Xue

Chen

et al. 2020

IET Microwaves, Antennas & Propagation

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Due to the explosive increase of wireless devices, efficient over‐the‐air testing of such devices is highly desirable. The reverberation chamber (RC) offers efficient and cost‐effective means to determine performance metrics of wireless devices, such as total radiated power (TRP). In this study, the distribution of the measured TRP in an RC is analytically derived, based on which the statistics (i.e. mean, variance) of the measured TRP are derived as well. RC measurements have been performed to verify the analytically derived statistics.

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Section: Measurements and Resultsmentioning

confidence: 99%

Section: Statisticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Statistical analysis of measurement uncertainty in total radiated power of wireless devices in reverberation chamber

Xue

Chen

et al. 2020

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

show abstract

Section: Approachmentioning

confidence: 99%

“…Various studies on correlation between the individual measurement series were performed, typically with the intention of estimating the uncertainty of RC measurements (e.g., Chen, 2013;Pirkl et al, 2012). In particular, commonly the number of individual samples is estimated by utilizing autocorrelation of a measurement sample sequence (e.g., Delangre et al, 2009;Pfennig, 2016). Spatial correlation and correlation between multiple ports of a multi-port antenna are important factors of influence for multiple-input multipleoutput (MIMO) wireless devices, and therefore they need to be evaluated for comparable performance analysis and test scenarios (e.g., Kildal and Rosengren, 2004;Amador et al, 2011;Chen et al, 2011;Janssen et al, 2013;Gradoni et al, 2013;Chen and Kildal, 2015;3GPP, 2017b).…”

Section: Approachmentioning

confidence: 99%

Employing correlation for wireless components and device characterization in reverberation chambers

Cammin¹,

Krush²,

Heynicke³

et al. 2019

J. Sens. Sens. Syst.

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Reverberation chambers are well-proven test environments for radio frequency (RF) measurements. Typically, mean values are taken from the measurements to characterize the equipment under test. In the novel approach presented in this paper, the correlation of measured sample sequences is utilized to detect deviations, in particular of the radiation characteristics, from reference equipment. This approach is exemplified by a measurement setup using several different antennas with the same housing. The complex correlation coefficient and the correlation coefficient with respect to the transferred power of two measured sample sequences are calculated and evaluated for a suitable frequency range to detect differences between the radiation characteristics.

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Investigation of automotive testing in a reverberation chamber

Xue

Chen

Zhang

2019

IET Microwaves, Antennas & Propagation

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Due to the increasing and urgent demands of automotive over‐the‐air (OTA) and electromagnetic compatibility (EMC) tests, it is necessary to evaluate the performance of a reverberation chamber (RC) loaded by a vehicle under test. Previous works mainly focus on qualitative analyses on the RC performance for a static vehicle. This article realises the idea of using rotated vehicles to improve field uniformity. Two methods are adopted to estimate the number of independent samples and to predict the uncertainty. In addition, the uncertainty is also estimated from many independent simulations. The estimated uncertainties show good agreements. It is shown that the uncertainty can be significantly improved by rotating the vehicle under test using a large turn‐table platform. Authors’ results show that the bigger the volume of the vehicle is, the better the improvement is. Besides, the authors find that the restriction of the volume of the vehicle under test can be relaxed in automotive tests by utilising the vehicle as a rotating mode stirrer. In addition, it is found that the Weibull distribution provides the best fit to the field of RC working near the lowest usable frequency (LUF) for all the cases.

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A General Method for Determining the Independent Stirrer Positions in Reverberation Chambers: Adjusting the Correlation Threshold

Cited by 20 publications

References 8 publications

Statistical analysis of measurement uncertainty in total radiated power of wireless devices in reverberation chamber

Statistical analysis of measurement uncertainty in total radiated power of wireless devices in reverberation chamber

Employing correlation for wireless components and device characterization in reverberation chambers

Investigation of automotive testing in a reverberation chamber

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