Strategies using time-domain measurements for radiated emissions testing in harsh environments

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Performing in-situ radiated emissions measurements, that is, in locations different from a standard test site, can be a challenging task because of the high electromagnetic noise levels in the ambient. A harsh electromagnetic environment characterizes such sites, and it usually results in difficulties when discerning between emissions from the equipment under test (EUT) and electromagnetic fields generated by surrounding devices. Moreover, communication signals from broadcasting services are generally significantly higher than the standard emission limits, making it even harder to determine compliance. In this article, we present different techniques leveraging the advantages of time-domain measurement systems to provide effective and practical solutions to mitigate ambient noise’s effect on radiated electromagnetic interference measurements. First, the test method used is described, and pragmatic considerations are given to ensure reliable and repeatable measurements. Multichannel time-domain measurement systems are introduced as the fundamental tool for the proposed strategies. Subsequently, different study cases are evaluated with real test examples, highlighting several criteria intended to reduce the impact of ambient noise on the actual emissions measures produced by the EUT. Finally, a real application of those strategies for measuring a photovoltaic system is described. Overall, the methods employed and the main advantages of using full-time-domain FFT-based receivers are reviewed. In addition, the possibility of incorporating this article’s outcomes into forthcoming electromagnetic standards about in-situ radiated emission measurements is also debated.
This work was supported in part by the European Partnership on Metrology, co-financed by the European Union’s Horizon Europe Research and Innovation Programme and by the Participating States under Project 21NRM06 EMC-STD, and in part by the “Ministerio de Ciencia e Innovación” through the Project DIN2021-012003 under Grant MCIN/AEI/10.13039/501100011033 and Grant PID2019-106120RBC31/AEI/10.13039/501100011033. The work of Jordi Solé-Lloveras was supported by the “Ministerio de Ciencia e Innovación” and financed by the European Union—NextGenerationEU, which has received funding from CDTI through the guidelines included in the “Plan de Recuperación, Transformación y Resiliencia” under Grant SNEO-20211223. The work of Marco A. Azpúrua was supported in part by the “Ministerio de Ciencia e Innovación” and financed by the European Union—NextGenerationEU, which has received funding from CDTI through the guidelines included in the “Plan de Recuperación, Transformación y Resiliencia” under Grant SNEO-20211223, and in part by the StandICT.eu 2023 Project, financed by the European Union’s Horizon Europe—Research and Innovation Programme—under Agreement 951972.
Peer Reviewed
Objectius de Desenvolupament Sostenible::9 - Indústria, Innovació i Infraestructura
Objectius de Desenvolupament Sostenible::11 - Ciutats i Comunitats Sostenibles
Objectius de Desenvolupament Sostenible::7 - Energia Assequible i No Contaminant
Postprint (published version)