The scattered power in a given scattering geometry depends in general on the incident polarization, and particular ones which yield the maximum or the minimum scattered powers at each field point in space are called optimal polarizations. The optimal polarizations for a scatterer, therefore, are point functions of the position in space. The theory of optimal polarization, however, includes in addition a set of incident polarizations for “cross-polarization nulls” and “co-polarization nulls” in backscatter. These terminologies will be defined later. Throughout the chapter, both the incident and scattered waves are assumed to be completely polarized.
KeywordsReceive Power Complex Vector Space Voltage Vector Output Terminal Incident Polarization
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