A Significance Test for Reverberation-Chamber Measurement Uncertainty in Total Radiated Power of Wireless Devices

Remley, Kate A.; Wang, Chih-Ming Jack; Williams, Dylan F.; Toorn, Johannes J. aan den; Holloway, Christopher L.

doi:10.1109/temc.2015.2481891

Cited by 53 publications

(51 citation statements)

References 24 publications

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“…In order to determine the power radiated by the DUT, it is necessary to determine the chamber's reference power transfer function REF ,, N M F G , averaged over F frequencies, N stirrer orientations, and M antenna positions, as measured by a measurement antenna whose efficiency (eMEAS) is known. As in [12], we define average received power as:…”

Section: Estimating Measurement Uncertainty Of Total Radiated Powmentioning

confidence: 99%

“…, [12]. The chamber's reference power transfer function may then be estimated from S-parameter measurements and written as: Note that the received power at the receiver assembly in (4) is pre-corrected for known receiver effective efficiency (ηRX) and reflection coefficient (ΓRX) [28]:…”

Section: Estimating Measurement Uncertainty Of Total Radiated Powmentioning

confidence: 99%

“…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%

“…Much of the prior work on uncertainty in reverberation chamber measurements can be found in [10]- [12], [19]- [21]. In the uncertainty study in [10] an empirical model for the uncertainty of the "over-the-air" (OTA) measurements was proposed.…”

mentioning

confidence: 99%

“…In this paper, we perform a significance test [12], [27] to compare two different components of uncertainty: (1) the uncertainty due to the finite number of mode-stirred measurement samples, which originates within a given modestirring sequence, and (2) the uncertainty due to the lack of spatial uniformity of the averaged fields in the chamber, which originates between different antenna locations in the chamber. By applying the significance test, we show that the uncertainty due to the finite number of mode-stirred measurement samples is dominant, as expected because spatial uniformity is high in our unloaded chamber.…”

mentioning

confidence: 99%

See 4 more Smart Citations

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%

Section: Estimating Measurement Uncertainty Of Total Radiated Powmentioning

confidence: 99%

Section: Estimating Measurement Uncertainty Of Total Radiated Powmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

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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Measurement Uncertainty in the Reverberation Chamber

Chen

Ren

Zhang

2018

Anechoic and Reverberation Chambers

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NB-IoT devices in reverberation chambers: a comprehensive uncertainty analysis

Hubrechsen

Remley

Jones

et al. 2021

Int. J. Microw. Wireless Technol.

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New protocols related to Internet-of-things applications may introduce previously unnoticed measurement effects in reverberation chambers (RCs) due to the narrowband nature of these protocols. Such technologies also require less loading to meet the coherence-bandwidth conditions, which may lead to higher variations, hence uncertainties, across the channel. In this work, we extend a previous study of uncertainty in NB-IoT and CAT-M1 device measurements in RCs by providing, for the first time, a comprehensive uncertainty analysis of the components related to the reference and DUT measurements. By use of a significance test, we show that certain components of uncertainty become more dominant for such narrowband protocols, and cannot be considered as negligible, as in current standardized test methods. We show that the uncertainty, if not accounted for by using the extended formulation, will be greatly overestimated and could lead to non-compliance to standards.

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A Significance Test for Reverberation-Chamber Measurement Uncertainty in Total Radiated Power of Wireless Devices

Cited by 53 publications

References 24 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

Measurement Uncertainty in the Reverberation Chamber

NB-IoT devices in reverberation chambers: a comprehensive uncertainty analysis

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