Far Field Directivity Enhancement using Modified Artificial Magnetic Conductor

In this paper we provide experimental and numerical simulation verification of the far field radiation properties of a slot excited artificial magnetic conductor. The form of excitation is provided via a coaxial conductor positioned between a slot etched in a PEC ground plane, with the upper conductor textured. Electromagnetic simulations show that the current distributed across the surface has an affect on far field radiation pattern. Further we demonstrate that the strategic placement of surface mounted resistors connecting adjacent patches can control confinement of surface currents, and as a result produce a more directive radiation pattern.