Efficient wideband electromagnetic scattering computation for frequency dependent lossy dielectrics using WCAWE
Bradley, Patrick and Brennan, Conor and Condon, Marissa (2009) Efficient wideband electromagnetic scattering computation for frequency dependent lossy dielectrics using WCAWE. IEEE Transactions on Antennas and Propagation, 57 (10). pp. 3274-3282. ISSN 0018-926X
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This paper presents a model order reduction algorithm for the volume electric field integral equation (EFIE) formulation, that achieves fast and accurate frequency sweep calculations of electromagnetic wave scattering. An inhomogeneous, two-dimensional, lossy dielectric object whose material is characterized by a complex permittivity which varies with frequency is considered. The variation in the dielectric properties of the ceramic BaxLa4Ti 2+xO 12+3x in the <1 GHz frequency range is investigated for various values of x in a frequency sweep analysis. We apply the well-conditioned asymptotic waveform evaluation (WCAWE) method to circumvent the computational complexity associated with the numerical solution of such formulations. A multipoint automatic WCAWE method is also demonstrated which can produce an accurate solution over a much broader bandwidth. Several numerical examples are given on order to illustrate the accuracy and robustness of the proposed methods.
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