Metallic Planar Lens for Increased Directivity of Standard Horn Antennas

In this paper, the design of a circular metallic lens for a standard rectangular horn antenna working at 1.3 GHz is proposed. The design procedure, based on the lens characteristic mode analysis, is detailed. Simulation results show that the lens provides a 3 dB increment in directivity of standard horn antennas. The resulting geometry is easy to manufacture and does not add additional complexity to the initial structure.