Abstract
A spectral formulation of the scattering problem relative to planar passive arrays in a stratified medium is presented. The solution is obtained in terms of generalized scattering matrix by means of the Galerkin version of the Moment Method technique. Further, an original approach to solve the multiple grid problem which allows to treat efficiently also cases of closely spaced arrays is presented. Comparisons with experimental results relative to crossed dipole arrays are presented.

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