The Effect of Peripheral Equipment Loading on Reverberation-Chamber Metrics

Published

September 1, 2019

Author(s)

Anouk Hubrechsen, Laurens A. Bronckers, Kate Remley, Rob Jones, Rob Horansky, Ad Reniers, Anne Roc'h, Bart Smolders

Abstract

Measuring wireless devices in a reverberation chamber often requires ancillary equipment to be present in the chamber. This paper illustrates the effect of their presence on metrics that are important in wireless device tests, such as chamber decay time, coherence bandwidth, and antenna efficiency calculations. The results show decreases in chamber decay time of approximately 20 % when power supplies and power cords are present in the NIST chamber. For the chamber studied, the effect is approximately 10 % with a regular power cord, demonstrated to be mostly caused by the copper conductors through measurements and a model of the cord insulation. The effect on antenna efficiency by using a predetermined time constant is shown to be between 5 % and 10 % for different setups. Results from two reverberation chambers are presented and compared, showing lower percentages for a chamber with higher losses.

Proceedings Title

EMC Europe 2019

Conference Dates

September 2-6, 2019

Conference Location

Barcelona, ES

Pub Type

Conferences

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DOI Link

Keywords

absorption cross section, antenna efficiency, chamber decay time, coherence bandwidth, reverberation chamber, wireless system

Citation

Hubrechsen, A. , Bronckers, L. , Remley, K. , Jones, R. , Horansky, R. , Reniers, A. , Roc'h, A. and Smolders, B. (2019), The Effect of Peripheral Equipment Loading on Reverberation-Chamber Metrics, EMC Europe 2019, Barcelona, ES, [online], https://doi.org/10.1109/EMCEurope.2019.8871515 (Accessed October 30, 2025)