Uncertainty From Choice of Mode-Stirring Technique in Reverberation-Chamber Measurements

Remley, Kate A.; Pirkl, Ryan J.; Shah, H. A.; Wang, Chih–Ming

doi:10.1109/temc.2013.2246570

Cited by 30 publications

(35 citation statements)

References 28 publications

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“…For uncorrelated measurements (i.e., negligible correlation between frequencies, paddle orientations, and antenna positions), the uncertainty due to the finite number of modestirred samples (given in (A.1) of the Appendix) for the received power measurements at a single antenna location (mj) may be approximated by ( [12], see (17) in [11]):…”

Section: Estimating Measurement Uncertainty Of Total Radiated Powmentioning

confidence: 99%

“…Also, knowledge of the K factor can help refine the estimation of uncertainty for realistic chamber set-ups [11], [12], [24].…”

Section: Determining Measurement Parameters For Uncertainty Calcumentioning

confidence: 99%

“…The first term in (11) introduces an almost negligible change for large N. However, the 1/N represents a significant term for proper estimation of small K factors. In order to measure such small K factor values, a large number of uncorrelated measurement points should be available.…”

Section: B K Factormentioning

confidence: 99%

“…The parameters necessary for evaluating these expressions were given in Section IV. The uncertainty observed in the actual measurements (7) will now be compared to the values predicted by the theoretical model (6) [11] where we used corrected K factor, KC, given by (11). The model proves to be accurate and highly useful for providing an estimation of the real measurement uncertainty for low-K environments.…”

Section: Evaluation Of Measurement Uncertaintymentioning

confidence: 99%

“…The model was based on the average K factor and was said to be valid for any value of K factor. A somewhat different approach proposed in [11] was based on a components-of-variance in model. The model utilized in this paper, focuses on a setup with a very low K factor in order to achieve very low uncertainty.…”

mentioning

confidence: 99%

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Estimating and Reducing Uncertainty in Reverberation-Chamber Characterization at Millimeter-Wave Frequencies

Senić

Remley

Wang

et al. 2016

IEEE Trans. Antennas Propagat.

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This contribution provides techniques for accurately characterizing uncertainty when measuring total radiated power at millimeter-wave frequencies. The setup is based on the reverberation chamber as a well-known measurement environment capable of performing total radiated power measurements of wireless devices. We show that by applying various stirring techniques, we can reduce the random component of measurement uncertainty to around 2%. We use a model for estimating the uncertainty for total radiated power measurements based on the K factor which is compared to uncertainties calculated from relative power measurements and we show excellent agreement. We perform a significance test to confirm that the uncertainty due to the limited number of mode-stirred samples dominates over the uncertainty due to the lack of spatial uniformity. The observed uncertainty is also compared to an ideal chamber situation and shows good agreement.Index Terms-Measurement uncertainty, millimeter wave, reverberation chamber, total radiated power, wireless systems.

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Section: Estimating Measurement Uncertainty Of Total Radiated Powmentioning

confidence: 99%

“…Also, knowledge of the K factor can help refine the estimation of uncertainty for realistic chamber set-ups [11], [12], [24].…”

Section: Determining Measurement Parameters For Uncertainty Calcumentioning

confidence: 99%

Section: B K Factormentioning

confidence: 99%

Section: Evaluation Of Measurement Uncertaintymentioning

confidence: 99%

mentioning

confidence: 99%

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Estimating and Reducing Uncertainty in Reverberation-Chamber Characterization at Millimeter-Wave Frequencies

Senić

Remley

Wang

et al. 2016

IEEE Trans. Antennas Propagat.

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Investigation of field uniformity and uncertainties in reverberation chamber using nonequidistant tuner position

Song

Wang²,

Guo

2017

Micro & Optical Tech Letters

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This paper investigates the field uniformity and uncertainties in a mode-tuned reverberation chamber when nonequidistant tuner position is used. Both simulation and actual measurements have been carried out to compare the field uniformity and sample correlation Figure 7 Simulated and measured results of the proposed balanced BPF. [Color figure can be viewed at wileyonlinelibrary.com]between the conventional equidistant tuner position and nonequidistant tuner position. Results show that the standard deviation of the electric field is superior with the latter scheme and mean time the sample correlation has also been improved.

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Measurement uncertainty of RC and its reduction techniques for OTA tests: a review

Chen

2019

IET Microwaves, Antennas & Propagation

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The emerging machine‐to‐machine (M2M) communications and Internet‐of‐things techniques bring new challenges in over‐the‐air (OTA) tests. The inexpensive M2M device usually aims at low‐cost and low‐power consumption rather than high data rate and, therefore, is usually equipped with a single antenna. Testing such M2M device in massive production requires efficient and cost‐effective OTA techniques. The reverberation chamber (RC) is a suitable solution for such tests of M2M (especially large‐form‐factor) devices. Since RC measurements are in essence stochastic measurements (with repeatable results), uncertainty analyses are of primary importance. This study gives an overview of the start‐of‐the‐art research on measurement uncertainty for both conventional and M2M OTA applications. In addition, new results about mode stirrers and diffusers (for uncertainty reduction) are provided.

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Uncertainty From Choice of Mode-Stirring Technique in Reverberation-Chamber Measurements

Cited by 30 publications

References 28 publications

Estimating and Reducing Uncertainty in Reverberation-Chamber Characterization at Millimeter-Wave Frequencies

Estimating and Reducing Uncertainty in Reverberation-Chamber Characterization at Millimeter-Wave Frequencies

Investigation of field uniformity and uncertainties in reverberation chamber using nonequidistant tuner position

Measurement uncertainty of RC and its reduction techniques for OTA tests: a review

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