THE QUASI-STATIC FIELD OF AN ELECTRIC DIPOLE EMBEDDED IN A TWO-LAYER CONDUCTING HALF-SPACE

Solutions are derived for the quasi-static electromagnetic field produced by an electric dipole located in the upper layer of a two-layer conducting half-space. Two orientations of the dipole are considered, (i) normal to, and (ii) parallel to the plane surface of the conductor. The well-known solutions for the corresponding fields of a dipole in a uniform conducting half-space emerge as special cases. Numerical calculations of the amplitudes and phases of the field components are made for a dipole situated midway down an upper layer one "skin depth" thick. The results are presented in a dimensionless form and are dependent only on the ratio of the conductivities of the two layers.