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The electromagnetic field of a circular loop antenna of radius a, carrying a nonuniform current I(ϕ), in the presence of a conducting sphere of radius b<a located symmetrically is considered. The current distribution on the thin-wire circular loop driven by a delta-function generator is determined by a Fourier series expansion in terms of tesseral harmonics. Eigenfunction series solutions for the...
The field of a thin circular loop antenna symmetrically placed near a conducting spherical cap is computed. The total field is expressed in terms of three modal expansions in three different regions. Most of the unknown coefficients are obtained analytically. Some are solved numerically by using point matching. The same problem is also solved numerically by the Method of Moments, where the surface...
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