NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
The Effect of Peripheral Equipment Loading on Reverberation-Chamber Metrics
Published
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.
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 8, 2025)