Uncertainty in reverberation-chamber antenna-efficiency measurements in the presence of a phantom

L.A. (Sander) Bronckers (Corresponding author), Kate A. Remley, Ben Jamroz, Anne Roc'h, A.B. (Bart) Smolders

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The effect of a user's proximity on wireless device performance is critical to test the device under realistic conditions. In this article, we propose and demonstrate an improved uncertainty estimation method for antenna efficiency measurements in a reverberation chamber. The improved method separately computes uncertainties due to the effects of chamber loading by a phantom and the effects of antenna mismatch introduced by this phantom, illustrating the sensitivity of uncertainty to close-proximity user effects. We demonstrate that, while the impact of the phantom may be significant on antenna efficiency, and, it has some influence on the uncertainty in the measurement, its impact on overall uncertainty may be insignificant. This is demonstrated using the two-antenna method in the presence of a phantom close to the antenna under test. We illustrate the method by summarizing the antenna efficiencies with their uncertainties and the impact of the phantom for important communication bands. Due to the large effect of the user on antenna performance, this type of measurement and its uncertainty evaluation is a valuable way to characterize antenna efficiency including user effects.

Originele taal-2Engels
Artikelnummer8979295
Pagina's (van-tot)4904-4915
Aantal pagina's12
TijdschriftIEEE Transactions on Antennas and Propagation
Volume68
Nummer van het tijdschrift6
Vroegere onlinedatumjan 2020
DOI's
StatusGepubliceerd - jun 2020

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