Dyadic Green’s Function of a Conical Cavity With Impedance Spherical Cap

This paper presents the dyadic Green's function (DGF) of a conical cavity with impedance spherical cap, which is derived using the eigenfunction expansion method and the method of scattering superposition. The E-field inside the conical cavity from an arbitrarily oriented infinitesimal dipole and a λ/2 dipole antenna is obtained numerically by making use of the developed DGF. Then, the DGF results are compared with those obtained by CST microwave studio commercial software, which is in a good agreement. The effect of surface impedance value on the E-field is also investigated.