The method of lines (MOL) is extended for the analysis of different geometries that include both rectangular and cylindrical conductors. The method of analysis is valid for multilevel dielectric structures. The cylindrical conductors can have circular pads and rectangular microstrips that are attached to the pads or the main body of the cylindrical via (buried microstrips). The mixed structures can include many ground planes with circular openings through which the via passes. The results are compared with previous results.
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A. Papachristoforos (1999) studied this question.
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