Modeling of Resonating Closed Impedance Bodies with Surface Integral Equation Methods

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Abstract

Numerical solutions of various surface integral equation formulations in modeling resonating (lossless) closed impedance bodies are investigated. It is demonstrated that for certain values of purely imaginary surface impedances very strongly resonating field solutions can appear. Some of the considered formulations that are known to work well outside these resonances, e.g., for lossy surfaces, can lead to very poor accuracy or even diverging solutions at these resonances. Among the considered formulations only the combined source integral equations, discretized with a mixed scheme, both avoid the nonphysical spurious internal resonances and work reasonably well at the physical (impedance) resonances.

Details

Original languageEnglish
Pages (from-to)361 - 368
JournalIEEE Transactions on Antennas and Propagation
Volume67
Issue number1
Publication statusPublished - Jan 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • combined field integral equation, combined source integral equation, Electric field integral equation, impedance boundary condition, impedance integral equation, resonance, self-dual formulation, spurious solution

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