Reciprocity, Spatial Mapping and Time Reversal in Electromagnetics by C. Altman & K. Suchy

Author:C. Altman & K. Suchy
Language: eng
Format: epub
Publisher: Springer Netherlands, Dordrecht

5.1.2 The plane-wave transverse-k spectrum of a current distribution in free space

We consider an electric current distribution, , in free space outside a plane-stratified medium. The z-axis is normal to the stratification. We propose initially to determine the free-space wave fields, E(r) and H(r), as integrals over s x and s y , the direction cosines of k t . All currents and fields, J(r),  E(r) and H(r), which are assumed to have exp(iωt) time dependence, with k 0 : = ω ∕ c, are Fourier analyzed in k-space, so that typically

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