RE: Scattering from dielectric material

In referenece to K.Y. See's question about field equivalence principles:

Each field equivalence principles amount to replace a given source
situation with a different, and more useful one, but with "equivalent"
field. Equivalent usually means here that both field (the original and
the one due to the equivalent sources) are equal in the zone of interest.
The original sources can be impressed (the standard theorem concerning
surface equivalent currents) or polarization ones (the volume equivalent
theorem quoted in the question). In any case, the proof requires to show
that the original field is compatible with the new sources. Then, and
this is the key point, one shows that this field satisfies a suitable
uniqueness theorem and therefore is the field produced by the
equivalent currents.

In the proof of the theorem is not required that the incident field is a
plane wave, and moreover the proof is simpler if impressed currents,
external to the dielectric domain, are given.

The detailed proof of the volume equivalence theorem appeared some years
ago on the IEEE Antenna and Propagation Transaction, but I can't find
now the complete reference data.

I hope that this answer Mr. See's question

Giuseppe Mazzarella

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Prof. Giuseppe MAZZARELLA
Dip. Ing. El. Elettronica, Universita' di Cagliari
Piazza D'Armi, I-09123 CAGLIARI

E-mail MAZZARELLA_at_VAXCA3.UNICA.IT
Received on Thu Dec 21 1995 - 13:09:00 EST