The effect of peripheral equipment loading on reverberation-chamber metrics

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

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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, showing lower percentages for a chamber with higher losses.
Original languageEnglish
Title of host publication2019 International Symposium on Electromagnetic Compatibility - EMC Europe
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages7-12
Number of pages6
ISBN (Electronic) 978-1-7281-0594-9
DOIs
Publication statusPublished - Sep 2019
Event2019 International Symposium on Electromagnetic Compatibility - EMC Europe (EMC2019) - Barcelona, Spain
Duration: 2 Sep 20196 Sep 2019
http://2019 International Symposium on Electromagnetic Compatibility - EMC Europe

Conference

Conference2019 International Symposium on Electromagnetic Compatibility - EMC Europe (EMC2019)
Abbreviated titleEMC2019
CountrySpain
CityBarcelona
Period2/09/196/09/19
Internet address

Keywords

  • absorption cross section (ACS)
  • antenna efficiency
  • chamber decay time
  • coherence bandwidth (CBW)
  • reverberation chamber (RC)

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