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This paper discusses electromagnetic surface waves that can exist in connection with a planar interface between two homogenous and isotropic half spaces, of which at least one is lossy. The idea is to unify and extend the classical Zenneck wave analysis into the region of negative permittivities. Several quantities that characterize the properties of the surface wave are discussed and analyzed.
Due to the broad spectrum and versatility of electromagnetics, progress and new discoveries in this field have not made a uniform history. The same and similar phenomena are reinvented by researchers whose interests center on different frequency ranges. Surface waves make an illustrating example. Starting from the works of Sommerfeld and Zenneck, the theory of radio waves over ground was developed...
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