In the dipole simplification, the person is represented by a point of
charge q, at a distance of h from the oppositely charged ground
image. For large distances d ;SPMgt;;SPMgt; h, the field falls off as #tex2html_wrap_inline1338#, as
with any dipole. In the near field, however, the field of the dipole
is better evaluated as the field of the two distinct charges. The
receiver is considered to be a distance d from the body, where d ;SPMlt;;SPMlt;
h. The two cases of the receiver being placed between the body an
the ground image (Equation #eqndipole1#307>) and perpendicular to the
dipole moment, near the body (Equation #eqndipole2#308> are shown.
#equation309#
#equation317#
In both cases, the receiver is optimally positioned as closely to the
body charge as possible.