Reduction of Electromagnetic Emission from ICs Using Soft Flexible Ferrite Sheets

Bernd Deutschmann, Junaid Shakeel Khan, Gunter Winkler, Jorge Victoria

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review

Abstract

Soft ferrite sheets are widely used to reduce e.g. unwanted electromagnetic emissions from electronic systems. Based on standardized measurement procedures, the attenuation properties of different materials and thicknesses of such ferrite sheets can be investigated over a wide frequency range. The results of the measurements can be used to find the right ferrite plates for targeted reduction of electromagnetic interferences. In this paper, we characterize different ferrite sheets by measuring the coupling between two antennas according to a standardized measurement procedure as defined in IEC 62333. Furthermore, these ferrite sheets are applied to the surface of an IC package and various IC-level measurements are used to demonstrate the real electromagnetic emission reduction that can be achieved with such ferrite sheets. Thereby reduction of the near E- and H-field is measured with near-field probes. Additionally, the reduction of the emissions obtained with the TEM -cell and the IC stripline method are considered. Finally, we will also discuss the influence of ferrite sheets on the conducted emission of an IC.

Original languageEnglish
Title of host publication2021 13th International Workshop on the Electromagnetic Compatibility of Integrated Circuits, EMC Compo 2021
PublisherInstitute of Electrical and Electronics Engineers
Pages19-24
Number of pages6
ISBN (Electronic)9781665423809
DOIs
Publication statusPublished - 2021
Event13th International Workshop on the Electromagnetic Compatibility of Integrated Circuits: EMC Compo 2021 - Bruges, Virtuell, Belgium
Duration: 9 Mar 202211 Mar 2022

Conference

Conference13th International Workshop on the Electromagnetic Compatibility of Integrated Circuits
Abbreviated titleEMC Compo 2021
Country/TerritoryBelgium
CityVirtuell
Period9/03/2211/03/22

Keywords

  • electromagnetic emission
  • EMI reduction
  • IEC 61967
  • IEC 62333
  • soft ferrite sheets

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Electrical and Electronic Engineering
  • Radiation

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