Electromagnetic analysis of large structures by using a hybrid early-time and low-frequency methodology

Wonwoo Lee, Mengtao Yuan, Tapan K. Sarkar

Research output: Contribution to journalArticlepeer-review


In this paper, we present an electromagnetic analysis for three-dimensional arbitrarily shaped large structures illuminated by a short pulse. The time domain electric field integral equation (EFIE) formulation is used to obtain the early time data with a central differencing scheme to evaluate the time derivatives of the potential functions. The solution method is based on the method of moments (MoM) and marching-on-in-lime (MOT) technique. Low frequency data is generated using a frequency domain integral equation method. The hybrid method is based on the singular value decomposition (SVD) of the frequency and the time domain data for a direct extrapolation of a causal signal. The detailed mathematical procedures are included along with representative numerical results from an aircraft model.

Original languageEnglish (US)
Pages (from-to)898-904
Number of pages7
JournalMicrowave and Optical Technology Letters
Issue number4
StatePublished - Apr 2007


  • Central difference
  • Early-time and low-frequency data
  • Electric field integral equation
  • Electromagnetic wave scattering
  • Hybrid method
  • Implicit method
  • Marching-on-in-time
  • Method of moments
  • Singular value decomposition
  • Time domain analysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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