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A formally exact solution that can easily be put in a form suitable for accurate numerical calculation is presented for a hollow coaxially fed cylindrical monopole in a rectangular waveguide. The solution utilises a well known Fourier-transform technique in conjunction with a Cheby̅shev polynomial representation for the unknown function. The result is an almost diagonalised infinite matrix—a form eminently suitable for the purpose of numerical inversion.
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Williamson et al. (1973) studied this question.
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