Estimating the radiated emissions from cables attached to a switching power supply in a MIL-STD 461 test

Guang Hua Li, Wei Qian, Andriy Radchenko, Gary Hess, Robert Hoeckele, Pete Jalbert, Thomas Van Doren, David Pommerenke, Daryl Beetner

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


Common-mode currents on cables attached to a switching power supply generate radiated emissions which may interfere with near-by components. A relatively simple equivalent circuit model is developed to predict the radiated emissions measured in a MIL-STD-461 or RTCA/DO-160 test. The intent of this model is to provide an estimate of emissions that allows the designer to better understand the mechanisms behind emissions issues and to rapidly predict the impact of changes to the system, like adding filtering, changing components, or modifying cable connections. The model represents cables connected to the power supply as transmission lines, represents coupling from the cables to the antenna using lumped capacitors, and represents the balun in the antenna using a transformer. The simulated results match the measured results well. This simple SPICE model allows EMI issues to be investigated early in the design of switched mode power supplies.

Original languageEnglish
Title of host publicationProceedings - 2013 IEEE International Symposium on Electromagnetic Compatibility, EMC 2013
Number of pages6
Publication statusPublished - 1 Dec 2013
Externally publishedYes
Event2013 IEEE International Symposium on Electromagnetic Compatibility: EMC 2013 - Denver, United States
Duration: 5 Aug 20139 Aug 2013

Publication series

NameIEEE International Symposium on Electromagnetic Compatibility
ISSN (Print)1077-4076
ISSN (Electronic)2158-1118


Conference2013 IEEE International Symposium on Electromagnetic Compatibility
Country/TerritoryUnited States


  • biconical antenna
  • EMI modelling
  • MIL-STD 461D
  • Radiated emissions
  • switched mode power supplies

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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