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In this paper, a two-level asymptotic subtraction method is developed to remove all unbounded singularities that appear in the curl-type layered-medium Green's function (LMGF) for uniaxial media. This allows for a more robust and more accurate interpolation scheme for the efficient evaluation of the curl-type operators in the LMGF.
Four different methods are examined to evaluate the potential due to a half-line source in a homogeneous space. The derivatives of the potential, which are needed to calculate the fields, are also treated. All four methods are compared in terms of accuracy and computational cost in order to determine the most efficient among them for each region of space. The gradient of the potential is also examined.
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