Patent ID: 7423595

Claim:
An apparatus comprising: a dual microstrip feed line circuitry underneath a bottom dielectric substrate; a ground plane layer overlying the bottom dielectric substrate, the ground plane layer having coupling apertures etched to the ground plane layer; a middle dielectric substrate overlying the bottom dielectric substrate and the ground plane layer; a middle metallized patch layer stacked over the middle dielectric substrate; a top dielectric substrate over the middle dielectric substrate and the middle metallized patch layer; a top metallized patch layer stacked underneath the top dielectric substrate and above the middle metallized patch layer for generating two polarized beams with the middle metallized patch layer; and an air layer between the middle dielectric substrate and the top dielectric substrate separating the middle metallized patch layer and the top metallized patch layer, wherein the dual microstrip feed line circuitry is configured to utilize corner-feeding techniques to enable diagonal modes of the patch layers, and each of the coupling apertures of the ground plane layer are configured with a non-resonant bow-tie shape to enable aperture coupling between the microstrip feed line circuitry and the middle metallized patch layer and the top metallized patch layer.