High frequency description of the field radiated by a strip array of printed dipoles

The formulation of Capolino, Albani, Maci and Felsen (see IEEE Trans. Antennas Propagat., vol.47, no.1, 2000) has been extended to the case of dipoles on a grounded dielectric slab, and applied to the case of a strip array. This configuration has been considered for the fact that the array Green´s function (AGF) is produced by only edge-diffracted rays. However, infinite strip arrays are reasonable approximations of very long arrays such as those employed in synthetic aperture radar (SAR) applications. The results of the present analysis can be applied directly to an actual array by multiplying the AGF for an element pattern of the patch antenna in an infinite array environment. This allows the estimation of the near field of the SAR antenna which can be used for calculating the inter-antenna coupling and pattern distortion when the antenna is mounted on an overcrowded platform.