A solid circular cylindrical monopole fed through a perfectly conducting ground plane by a coaxial line is rigorously analyzed by applying full wave field theory using the conservation of complex power technique. The model of this analysis is the structure of a coaxial line feeding a larger coaxial waveguide terminated in a ground plane. As the outer radius of the coaxial waveguide is increased, the transverse electromagnetic (TEM) mode admittance of a cylindrical monopole radiating over a ground plane is estimated using a variable bound approach. Numerical results for a thin monopole are established and compared with R.W.P. King's (1971) results for the tubular one. Results for a thick monopole fed by its coaxial line having the dielectric constant epsilon /sub r/ are also given.>
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Do-Nhat et al. (1991) studied this question.
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