Patent ID: 8643546

Claim:
A uniplanar radiation pattern insulator, comprising: a dielectric substrate, allocated between a plurality of antennae, wherein the dielectric substrate comprises a top surface and a bottom surface, and a normal direction of the dielectric substrate is substantially perpendicular to propagation directions of a plurality of electromagnetic waves radiated from the antennae; and a plurality of uniplanar radiation pattern insulation elements, allocated on the top surface or the bottom surface of the dielectric substrate, wherein the uniplanar radiation pattern insulation elements are located in one plane and are not grounded and are arranged in at least three columns; wherein the at least three columns comprises two side columns and at least one inner column; and wherein a number of the uniplanar radiation pattern insulation elements arranged in each of at least one inner column is less than a number of the uniplanar radiation pattern elements arranged in each of the two side columns.