A fast frequency-domain parameter extraction method using time-domain FEM

Weinong Fu, Xiu Zhang, Siu Lau Ho

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


In the design of electric devices, the designers are usually required to extract the equivalent circuit parameters of electromagnetic fields at different frequencies. A traditional method is to solve a frequency-domain problem of eddy-current fields using FEM and to calculate the parameters in postprocessing. To obtain the parameters at different frequencies, frequency-sweeping is required. However, it is time consuming and inefficient. In this paper, a novel method for impedance extraction is presented. The proposed method only needs to solve a time-domain problem using FEM a few times, then the impedances at all frequencies can be directly obtained. The numerical experiment, as reported in this paper, shows that it can reduce the computing time by about 95% when compared with traditional methods.
Original languageEnglish
Article number6749261
JournalIEEE Transactions on Magnetics
Issue number2
Publication statusPublished - 1 Feb 2014


  • Electromagnetic field
  • FEM
  • frequency domain
  • impedance
  • parameter extraction
  • time domain

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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