Js. Colburn et Y. Rahmatsamii, ELECTROMAGNETIC SCATTERING AND RADIATION INVOLVING DIELECTRIC OBJECTS, Journal of electromagnetic waves and applications, 9(10), 1995, pp. 1249-1277
The influence of dielectric objects on electromagnetic fields is an im
portant consideration in many engineering problems. In some applicatio
ns, the scattering from dielectric objects for a known incident field
is of interest. In other situations where dielectric objects interact
with radiators - such as biological tissue near a wireless transceiver
or a dielectric loaded antenna - the resulting input impedance, far-f
ield radiation and power absorption characteristics are important quan
tities to determine. In this work an integral equation approach is use
d to solve these problems for which the method of moments is applied t
o facilitate a numerical solution. A comprehensive computer program wa
s developed that handles both scattering and radiation problems. With
the computer program both dipole and superquadric loop antennas can be
modeled which have any arbitrary relative location and orientation to
dielectric bodies of interest. The implementation is verified by comp
arison with finite-difference time-domain results and available measur
ed data for both a scattering and radiation problem involving dielectr
ic objects. It is then used to study some diverse situations which wou
ld be difficult to handle with standard Cartesian grid finite-differen
ce time-domain, including: monostatic radar cross section of a dielect
ric slab with various conductivities; dipole and superquadric loop rad
iators printed on a dielectric substrate; and loop antennas in close p
roximity to a model of the human head.