Accurate and Efficient Evaluation of Characteristic Modes

Research output: Contribution to journalArticle


A new method to improve the accuracy and efficiency of characteristic mode (CM) decomposition for perfectly conducting bodies is presented. The method uses the expansion of the Green dyadic in spherical vector waves. This expansion is utilized in the method of moments (MoM) solution of the electric field integral equation (EFIE) to factorize the real part of the impedance matrix. The factorization is then employed in the computation of CMs, which improves the accuracy as well as the computational speed. An additional benefit is a rapid computation of far fields. The method can easily be integrated into existing MoM solvers. Several structures are investigated illustrating the improved accuracy and performance of the new method.


External organisations
  • Czech Technical University in Prague
  • University of Coimbra
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Other Electrical Engineering, Electronic Engineering, Information Engineering


  • Antenna theory, convergence of numerical methods, eigenvalues and eigenfunctions, electromagnetic theory, numerical analysis
Original languageEnglish
JournalIEEE Transactions on Antennas and Propagation
StateE-pub ahead of print - 2018 Sep 8
Publication categoryResearch

Related research output

Doruk Tayli, Capek, M., Akrou, L., Losenicky, V., Jelinek, L. & Mats Gustafsson, 2017, Electromagnetic Theory Department of Electrical and Information Technology Lund University Sweden. (TEAT)

Research output: Book/ReportReport

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