简介：CalculationsoftheElectroMagnetic(EM)responseproducedbyalargehorizontalloopplacedoverlayeredmediumarerathercomplexbecauseitsintegralexpressioncontainstheproductoftwoBesselfunctionsandhasadivergentterm.Inthispaper,animprovedfastHankelandGaver-Stehfesttransformsareintroducedtosolvethestrong-oscillationandslow-decaypropertiesoftheintegrand,whereoneBesselfunctionintheproductissubstitutedbyacarefullychosenpolynomialofhighaccuracyandtheotherusedasthedigitalfiltercoefficientsintheconvolutionintegral.Comparisonsprovethevalidityandtheefficiencyoftheproposedmethod.
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