Correction of Beam Direction in Adaptive Parasitic Monopole Arrays Using a Truncated Cone Structure

The finite size of the ground plane in adaptive parasitic arrays employing monopole elements affects the radiation pattern, causing a shift of the main lobe from the azimuthal plane of the antenna. This is usually a nondesired behavior. In order to correct this shift, a truncated cone is placed on the top of the radiating structure. The cone works as a proper reflector deflecting the main beam and thus producing a pattern with a greater gain on the azimuthal plane.