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Numerical instabilities of the moment method in waveguide calculations

Numerical instabilities of the moment method in waveguide calculations

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© The Institution of Electrical Engineers
Published

Unstable results were obtained when utilising the moment method in parallel-plate-waveguide problems. The cause of the instability is determined. The introduction of a missing boundary condition leads to very satisfactory numerical results.

Inspec keywords: numerical analysis; waveguide theory

Other keywords: boundary condition; numerical instability; parallel plate waveguide; moment method; waveguide

Subjects: Waveguide and cavity theory

References

    1. 1)
      • S.C. Wu , Y.L. Chow . An application of the moment method to waveguide scattering problems. IEEE Trans. , 744 - 749
    2. 2)
      • Decréton, M.C.: `Numerical resolution for the radiating field of an open ended waveguide with different mouth shapes', Proceedings of the international colloquium on field simulation, 1974, London, p. 671–676.
    3. 3)
      • M.C. Decreton . Open ended waveguides: theoretical analysis and application to small distance and complex permittivity measurements. AGEN-Mitteilungen , 57 - 64
    4. 4)
      • A.L. Weinstein . (1969) , The theory of diffraction and the factorization method.
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